CN1022414C

CN1022414C - Process for preparation of cyclobutane derivatives

Info

Publication number: CN1022414C
Application number: CN 89106995
Authority: CN
Inventors: 市川裕一郎; 成田文; 松尾薰; 青山惠子; 松村富美子; 西山幸广; 松原谦一; 长幡武光; 星野洪郎; 关淳一; 奈良坂纮一; 林雄二郎
Original assignee: Nippon Kayaku Co Ltd
Current assignee: Nippon Kayaku Co Ltd
Priority date: 1988-09-09
Filing date: 1989-09-08
Publication date: 1993-10-13
Anticipated expiration: 2004-09-08
Also published as: CN1040978A

Abstract

The present invention relates to cyclobutane derivatives represented by the general formula (wherein B represents a pyrimidine base or a purine base, R₄Represents a hydrogen atom), which is useful as an antiviralAn agent or an anticancer agent by reacting a compound of the general formula (V) (wherein R₄Represents a hydrogen atom or a protecting group, and X represents a leaving group) with a pyrimidine base or a purine base in a solvent to produce a compound of formula (IV), and if the compound thus obtained has a protecting group, removing the protecting group.

Description

Process for preparing cyclic buttane derivatives

The present invention relates to can be used as New cyclobutane derivative, be used to prepare the preparation method of intermediate and this derivative of this derivative as medicaments such as antiviral agent, carcinostatic agents.

Known many materials relevant with nucleic acid have antiviral or antitumour activity, and some of them are clinically as effectively drug use.For example, Yidarabine[M.privat de Garilhe and J.de Rubber, C.R.Acad.Soc.D(Paris) 259,2725(1964)], Aciclovir[G.B.Elion etc., the Proc.Natl.Acad.Sci. U.S., 74,5716(1977)] and Azidothymidine[H.Mitsuya etc., the Proc.Natl.Acad.Sci. U.S., 82,7096(1985)] be known antiviral agent, 5 FU 5 fluorouracil and cytosine arabinoside are known carcinostatic agents.

But because solvability, the oral absorption of above-mentioned antiviral agent are relatively poor and influential to metabolism, its range of application is restricted, and instructions of taking also is restricted.In addition, because side effect as bone marrow depression (bone marrow suppression) can take place, these antiviral agents can produce many problems such as being difficult to take for a long time.In addition, because malignant diseases toxicity disease such as acquired immunodeficiency syndrome (AIDS), adult T-cell leukemia (ATL) etc. have the trend of increase, need the new antiviral agent of development with excellent effect.

On the other hand, there are many open questions in above-mentioned carcinostatic agent equally at aspects such as suitability and side effects.

The present invention relates to by the New cyclobutane derivative shown in the following logical formula IV:

Wherein, B represents nucleic acid base, R ⁴Represent hydrogen atom or blocking group.

Nucleic acid base B in the logical formula IV can be pyrimidine bases and purine bases, and the example of pyrimidine bases comprises the group of following formula representative,

The example of purine bases comprises the group of following formula representative,

In above-mentioned formula, Y ¹Represent hydrogen atom or C _1-4Low alkyl group; Y ²Represent hydrogen atom, halogen atom or amino; Y ³Represent hydrogen atom or amino; Y ⁴Represent hydrogen atom or amino.

In the compound of logical formula IV representative, preferred those substituent sterie configurations wherein are that substituent B is that trans relation and methylol and another methylol adjacent with B are the compound of trans relation with the methylol that is adjacent, more preferably those sterie configurations are (1R, 2R, compound 3S).

Provide the specific examples of the compound of some logical formula IV representatives below.In this manual, represent the space configuration of compound by following mode, be about to the tetramethylene ring and regard a plane as that the substituting group of (on one side) is represented with α under the plane, the substituting group of (the other side) is represented with β on the plane.

1.(±)-9-[(1 α, 2 α, 3 β)-2,3-pair-(methylol) tetramethylene-1-yl]-VITAMIN B4

2.9-[(1S, 2R, 3S)-2,3-pair-(methylol) tetramethylene-1-yl]-VITAMIN B4

3.9-[(1R, 2R, 3R)-2,3-pair-(methylol) tetramethylene-1-yl]-VITAMIN B4

4.(±)-9-[(1 α, 2 α, 3 β)-2,3-pair-(methylol) tetramethylene-1-yl]-guanine

5.9-[(1S, 2R, 3S)-2,3-pair-(methylol) tetramethylene-1-yl]-guanine

6.9-[(1R, 2R, 3R)-2,3-pair-(methylol) tetramethylene-1-yl]-guanine

7.(±)-9-[(1 β, 2 α, 3 β)-2,3-pair-(methylol) tetramethylene-1-yl]-VITAMIN B4

8.9-[(1R, 2R, 3S)-2,3-pair-(methylol) tetramethylene-1-yl]-VITAMIN B4

9.9-[(1S, 2S, 3R)-2,3-pair-(methylol) tetramethylene-1-yl]-VITAMIN B4

10.(±)-9-[(1 β, 2 α, 3 β)-2,3-pair-(methylol) tetramethylene-1-yl]-guanine

11.9-[(1R, 2R, 3S)-2,3-pair-(methylol) tetramethylene-1-yl]-guanine

12.9-[(1S, 2S, 3R)-2,3-pair-(methylol) tetramethylene-1-yl]-guanine

13.(±)-2-amino-2-[(1 β, 2 α, 3 β)-2,3-pair-(methylol) tetramethylene-1-yl]-purine

14.2-amino-9-[(1R, 2R, 3S)-2,3-pair-(methylol) tetramethylene-1-yl]-purine

15.2-amino-9-[(1S, 2S, 3R)-2,3-pair-(methylol) tetramethylene-1-yl]-purine

16.(±)-2-amino-9-[(1 β, 2 α, 3 β)-2,3-pair-(methylol) tetramethylene-1-yl]-chloropurine

17.2-amino-9-[(1R, 2R, 3S)-2,3-pair-(methylol) tetramethylene-1-yl]-chloropurine

18.2-amino-9-[(1S, 2S, 3R)-2,3-pair-(methylol) tetramethylene-1-yl]-6-chloropurine

19.(±)-2,6-diamino-9-[(1 β, 2 α, 3 β)-2, two (methylol) tetramethylene of 3--1-yl]-purine

20.2,6-diamino-9-[(1R, 2R, 3S)-2,3-pair-(methylol) tetramethylene-1-yl]-purine

21.2,6-diamino-9-[(1S, 2S, 3R)-2,3-pair-(methylol) tetramethylene-1-yl]-purine

22.(±)-9-[(1 β, 2 α, 3 β)-2, two (methylol) tetramethylene of 3--1-yl]-xanthoglobulin

23.9-[(1R, 2R, 3S)-2,3-pair-(methylol) tetramethylene-1-yl]-xanthoglobulin

24.9-[(1S, 2S, 3R)-2,3-pair-(methylol) tetramethylene-1-yl]-xanthoglobulin

25.(±)-1-[(1 β, 2 α, 3 β)-2,3-pair-(methylol) tetramethylene-1-yl]-2,4-(1H, 3H)-pyrimidine dione

26.1-[(1R, 2R, 3S)-2,3-pair-(methylol) tetramethylene-1-yl]-2,4(1H, 3H)-pyrimidine dione

27.1-[(1S, 2S, 3R)-2,3-pair-(methylol) tetramethylene-1-yl]-2,4(1H, 3H)-pyrimidine dione

28.(±)-1-[(1 β, 2 α, 3 β)-2,3-pair-(methylol) tetramethylene-1-yl]-5-methyl-2,4-(1H, 3H)-pyrimidine dione

29.1-[(1R, 2R, 3S)-2,3-pair-(methylol) tetramethylene-1-yl]-5-methyl-2,4-(1H, 3H)-pyrimidine dione

30.1-[(1S, 2S, 3R)-2,3-pair-(methylol) tetramethylene-1-yl]-5-methyl-2,4(1H, 3H)-pyrimidine dione

31.(±)-4-amino-1-[(1 β, 2 α, 3 β)-2,3-pair-(methylol) tetramethylene-1-yl]-2(1H)-pyrimidone

32.4-amino-1-[(1R, 2R, 3S)-2,3-pair-(methylol) tetramethylene-1-yl]-2(1H)-pyrimidone

33.4-amino-1-[(1S, 2S, 3R)-2,3-pair-(methylol) tetramethylene-1-yl]-2(1H)-pyrimidone

34.(±)-2-amino-9-[(1 β, 2 α, 3 β)-2,3-pair-(acetoxy-methyl) tetramethylene-1-yl]-purine

35.2-amino-9-[(1R, 2R, 3S)-2,3-pair-(acetoxy-methyl) tetramethylene-1-yl]-purine

36.2-amino-9-[(1S, 2S, 3R)-2,3-pair-(acetoxy-methyl) tetramethylene-1-yl]-purine

In compound of the present invention, the compound of logical formula IV representative can prepare by following method: the compound that makes general formula (V) representative

(R ⁴Represent hydrogen atom or blocking group, X represents leavings group) with the nucleic acid alkali reaction, obtain the compound of following logical formula VI representative

(R ⁴Represent hydrogen atom or blocking group, B ¹Represent nucleic acid alkali), if on the logical formula VI compound protecting group is arranged, also need be with suitable protecting group cancellation reagent cancellation protecting group.

As for the protecting group R in general formula (V) and (VI) ⁴, can not add any any group that is often used as protecting group that restrictedly uses.Protecting group R ⁴Example comprise ester type protecting group such as acyl group (as ethanoyl, benzoyl etc.), formamyl (as formyl-dimethylamino, diphenyl amino formyl radical etc.); Ether type protecting group such as silyl (as t-butyldimethylsilyl, t-butyldiphenylsilyl etc.); (C ₁-C ₄) alkoxyl group-(C ₁-C ₄) alkyl (as methoxyl methyl etc.); THP trtrahydropyranyl, benzyl (as benzyl, 4-methoxy-benzyl, trityl etc.) etc.The example of leavings group X in the general formula (V) comprises sulfonyloxy such as mesyloxy, tolysulfonyl oxygen base, trifluoromethyl sulfonyloxy etc., and halogen atom such as chlorine, bromine, iodine etc.

The example of nucleic acid alkali comprises pyrimidine base such as uridylic, thymus pyrimidine, cytosine(Cyt), 5 FU 5 fluorouracil etc., and purine bases such as VITAMIN B4, xanthoglobulin, guanine, 2-amino-6-chloropurine, 2-aminopurine, 2,6-diaminopurine etc.These compounds can have protecting group.For example, following formula (XII)-(X VII) compound:

[in above-mentioned formula, R ⁴Definition same as described above; R ⁵Represent C ₁-C ₅Low alkyl group such as benzyl, butyl etc., (C ₁-C ₅Alkoxyl group)-(C ₁-C ₅Alkyl) group such as methoxyethyl etc., or represent R ⁴; R ⁶Represent hydrogen atom, halogen atom or NHR ⁴; R ⁷Represent hydrogen atom or NHR ⁴; Y ¹Represent hydrogen atom, halogen atom or C ₁-C ₅Low alkyl group].

In the reaction of the compound of general formula (V) representative and nucleic acid alkali [for example above-mentioned general formula (XII)-(X VII) compound], the ratio of the general formula of recommendation (V) compound and general formula (XII)-(X VII) compound be per 1 equivalent the former with the latter of about 0.5-10 equivalent (is better with about 1-5 equivalent).This reaction can be carried out in the presence of alkaline catalysts, also can not have catalyzer in the presence of carry out, salt of wormwood, lithium hydride, sodium hydride etc. can be used as alkaline catalysts.This is reflected at solvent such as N, dinethylformamide ((DMF), dimethyl sulfoxide (DMSO) (DMSO), 1, under the existence of 3-dimethyl-2-imidazolone, hexamethylphosphoramide (HMPA) etc., under 0 ℃ of reflux temperature (preferably room temperature to about 170 ℃), carry out to solvent, amount in general formula (XII)-(X VII) compound is a benchmark, the usage quantity of the alkaline catalysts of recommending is the 0-2 equivalent, be preferably the 0.5-1.5 equivalent, best is about 0.8-1.2 equivalent.

Can select suitable blocking group cancellation reagent and blocking group elimination method cancellation blocking group (comprising alkyl) from logical formula VI compound according to the kind of blocking group.For instance, alkali such as sodium hydroxide, sodium methylate, ammonia etc., sour example hydrochloric acid, sulfuric acid etc., fluorizating agent such as tetrabutylammonium fluoride etc. can be used as blocking group cancellation reagent.At least the blocking group elimination method can adopt for example method such as hydrogenolysis.

In the The compounds of this invention of logical formula IV representative, wherein B be 2,6-diaminopurine base, 2-aminopurine base or 2-amino-6-halogen purine radicals compound also can by following general formula (the IV a) compound of representative prepares:

In this reaction formula, R ⁴Definition same as described above; X represents leavings group; Y ²Represent hydrogen atom, halogen atom or amino.

For instance; as react shown in the formula I; (get up by the IV a) hydroxyl protection of the guanine derivatives of representative with general formula for compound by preparation general formula (XX) representative; make general formula (XX) compound and halogenating agent such as phosphoryl chloride etc. or sulphonyl agent as 1 then; 3, reactions such as 5-trimethylbenzene chloride, the compound of synthetic general formula (X XI) representative; the compound (X XI) that obtains is thus heated with ammonia-methyl alcohol in ampoule, obtain wherein Y ²General formula (IV b) compound for amino.If use palladium carbon catalyst with this compound for catalysis reduction and cancellation blocking group subsequently, just can obtain wherein Y ²General formula (IV b) compound for hydrogen atom.Perhaps, by being cancellation blocking group general formula (X XI) compound of halogen atom from X wherein, obtain wherein Y ²General formula (IV b) compound for halogen atom.

Wherein B is that the The compounds of this invention of the logical formula IV representative of xanthoglobulin base also can prepare by the compound of following general formula (IV c) representative:

Shown in reaction formula (2), for instance, by handle the adenine derivative diazotization with general formula (IV c) representative with nitrous acid, hydrolysis or with processing such as lytic enzyme such as adenosine deaminases then obtains the compound that general formula (IV d) is represented thus.

In addition, can synthesize logical formula IV compound as follows.Shown in following reaction formula (3):

(in this reaction formula, R ⁴Represent hydrogen atom or blocking group, X represents leavings group, and B represents nucleic acid alkali, B ²Representative can be converted into the group of B by a step or the reaction of a few step) handle general formula (V) compound with azido cpd such as sodiumazide etc., then with the sulfonamide derivatives of ordinary method reduction with synthetic general formula (X XII) representative, again according to known method [R.Vince etc., J.Med.Chem., 27,1358, (1984); R.Vince etc., J.Med.Chem., 30,2026(1987); Y.F.Shealy and C.A.O ' Dell, J.Heterocyclic Chem., 13,1015, (1976); Y.F.Shealy etc., J.Heterocyclic Chem., 18,383(1981) etc.] intermediate by general formula (XX III) representative is converted into logical formula IV compound with general formula (X XII) compound.

In addition, find that also logical formula III compound is very useful in general formula (V) compound or the preparation by the The compounds of this invention that leads to the formula IV representative.Since logical formula III compound can optically active form form obtain, also can obtain the logical formula IV compound that exists with the optically active form form.

Therefore, shown in following reaction formula (4):

(in this reaction formula, R ¹Representative has the alkyl or the aralkyl of 1-5 carbon atom, perhaps two R respectively ¹The representative that links together has the ring alkylidene group of 2-3 carbon atom; R ²Represent hydrogen atom, have the alkyl of 1-5 carbon atom, the hydroxyalkyl of protection or the carboxyl of protection; R ³Represent hydrogen atom, have the low alkyl group of 1-5 carbon atom, lower alkoxy or aralkoxy with 1-5 carbon atom; The A representative has the straight or branched alkylidene group of 2-5 carbon atom; Y represention oxygen atom or sulphur atom; That Z representative replaces or unsubstituted methylene radical, Sauerstoffatom or sulphur atom) logical formula I compound and logical formula II compound react in the presence of condensation catalyst, obtain the tetramethylene compound of logical formula III representative with high yield, according to the kind of catalyzer, this product is racemic or has optically active.As for the condensation catalyst that is used for this reaction, for instance, can be the mixture of Lewis acid and Lewis acid and equivalent or excessive ligand, described lewis acidic example comprises titanium compound such as titanium tetrachloride, dichloro diisopropoxy titanium etc.; Tin compound such as tin protochloride, tin tetrachloride, trifluoromethane sulfonic acid tin etc.; And aluminum compound such as chlorodimethylalumiu, diethylaluminum chloride etc.As for above-mentioned ligand, preferably select glycol for use with complicated three-dimensional arrangement.The example of above-mentioned ligand comprises having ring that is not less than 5 Yuans rings (being preferably 5-8 person's ring) and the compound that 2 hydroxyl group are all arranged in the both sides of ring in those molecules, and for example (2S, 3S)-2,3-O-(1-phenyl ethylidene)-1,1,4,4-tetraphenyl-1,2,3,4-butantetraol (compd A), (2R, 3R)-2,3-O-(1-phenyl ethylidene)-1,1,4,4-tetraphenyl-1,2,3,4-butantetraol (compd B), (2S, 3S)-2,3-O-benzylidene-1,1,4,4-tetraphenyl-1,2,3,4-butantetraol (Compound C), (2R, 3R)-2,3-O-benzylidene-1,1,4,4-tetraphenyl-1,2,3,4-butantetraol (Compound D), (2S, 3S)-2,3-O-(1-phenyl ethylidene)-1,1,4,4-four (4-methoxyphenyl)-1,2,3,4-butantetraol (compd E), (2R, 3R)-2,3-O-(1-phenyl ethylidene)-1,1,4,4-four (4-methoxyphenyl)-1,2,3,4-butantetraol (compound F 17-hydroxy-corticosterone), the racemic modification of above-claimed cpd etc.The logical formula I compound that adopts and the ratio of logical formula II compound are the logical formula II compound that per 1 equivalent compound (I) uses 0.1-5 equivalent (preferred 0.5-2 equivalent).The consumption of condensation catalyst is that the logical formula I compound of per 1 equivalent uses 0.001-2 equivalent (preferred 0.01-1.2 equivalent) catalyzer.Sometimes can this reaction more effectively be carried out by in reaction system, adding dewatering agent such as molecular sieve 4A etc.The example that is applicable to the solvent of this reaction comprises hydrocarbon solvent such as pentane, hexane, heptane, sherwood oil, benzene, toluene, ethylbenzene, trimethylbenzene, tri-isopropyl benzene etc.; Halogenated hydrocarbon solvent such as Flon etc.Ether solvents such as ether, tetrahydrofuran (THF) etc.; Acetonitrile; And the mixture of above-mentioned solvent.The temperature of reaction of recommending be the freezing point of solvent to its boiling point, be preferably in-50 ℃ to about 30 ℃ scopes.For example, by making 1 equivalent lead to formula I compound (R wherein ²For methoxycarbonyl, A are CH ₂CH ₂, Y is that Sauerstoffatom and Z are Sauerstoffatom) with the logical formula II compound of 1.25 equivalents (R wherein ¹Be methyl and R ³Be hydrogen atom) at condensation catalyst [0.05 equivalent dichloro diisopropoxy titanium and 0.055 equivalent (2S, 3S)-2,3-O-(1-phenyl ethylidene)-1,1,4,4-tetraphenyl-1,2,3, the mixture of 4-butantetraol (compd A)] and the existence of molecular sieve 4A under, in the solvent mixture of forming by hexane and toluene, under 0 ℃ of temperature of reaction, react, can high chemical yield and high optically-active productive rate obtain (2S, 3S)-and 3-methoxycarbonyl-1,1-pair-(methylthio group)-2-(oxazolidine-2-ketone-3-yl)-the carbonyl tetramethylene.If this is reflected at by dichloro diisopropoxy titanium and (2R, 3R)-2,3-O-(1-phenyl ethylidene)-1,1,4,4-tetraphenyl-1,2,3, carry out under the existence of the mixed catalyst that 4-butantetraol (compd B) is formed, can obtain (2R, 3R)-3-methoxycarbonyl-1,1-pair-(methylthio group)-2-(oxazolidine-2-ketone-3-yl)-the carbonyl tetramethylene, in addition, if this is reflected at racemize 2,3,-O-(1-phenyl ethylidene)-1,1,4,4-tetraphenyl-1,2,3, carry out under the existence of 4-butantetraol, obtain (±)-(2 α, 3 β)-and 3-methoxycarbonyl-1,1-pair-(methylthio group)-2-oxazolidine-2-ketone-3-yl)-the carbonyl tetramethylene.

In compound of the present invention, by R ¹, R ²And R ³The example of the alkyl with 1-5 carbon atom of representative comprises methyl, ethyl, butyl etc.; The example of aralkyl comprises alkyl such as benzyl, the 4-methoxybenzyl etc. that replaced by aromatic ring; The example of the hydroxyalkyl of protection comprises benzyloxymethyl, ethoxymethyl, tert-butyl diphenyl silicomethane oxygen methyl etc.; The example of the carboxyl of protection comprises carbalkoxy such as methoxycarbonyl, ethoxycarbonyl etc. and aralkoxycarbonyl such as carbobenzoxy-(Cbz) etc.; Example with alkoxyl group of 1-5 carbon atom comprises methoxyl group, allyloxy etc.; The example of aralkoxy comprises benzyloxy, 4-methoxy benzyloxy, tert-butyl diphenyl siloxy-etc.

In the present invention, the examples for compounds of logical formula III representative comprises wherein R ¹, R ², R ³, A, Y and the logical formula III compound of Z shown in following table 1.(table is seen the literary composition back)

Wherein, two R in the logical formula II compound ¹Group can be identical or different.

Can be according to the described method of following reaction formula (5), for example with the compound of logical formula III representative (R wherein ²Carboxyl and R for protection ³Be hydrogen atom) prepare the compound of general formula (V) representative:

[in reaction formula (5), R ¹Identical with the definition in the logical formula II, R ¹⁰And R ¹¹Represent hydrogen atom respectively, have the alkyl or the aralkyl of 1-5 carbon atom, R ⁴Represent hydrogen atom or blocking group, but X representative cancellation group].

Therefore, in the first step, the compound of logical formula III representative (R wherein ²Carboxyl and R for protection ³Be hydrogen atom) in alcoholic solvent (as methyl alcohol, ethanol etc.), in the presence of respective metal alkoxide (as magnesium methylate, sodium ethylate etc.), in-78 ℃ of temperature (temperature preferably is no more than room temperature) scope internal reaction to the boiling point of solvent, or in alcoholic solvent (as methyl alcohol, ethanol etc.), solvolysis in the presence of acid (example hydrochloric acid, tosic acid etc.) or alkali (as triethylamine, sodium hydroxide etc.) obtains the corresponding ester (R wherein of general formula (VII) representative thus ¹⁰And R ¹¹Represent hydrogen atom, have the alkyl or the aralkyl of 1-5 carbon atom).Perhaps,, or make logical formula III compound hydrolysis under the existence of alkali (as sodium hydroxide, salt of wormwood etc.), obtain wherein R thus in acid (example hydrochloric acid, tosic acid etc.) ¹⁰And R ¹¹Represent general formula (VII) carboxylic acid of hydrogen atom.By the compound of general formula (VII) representative that obtains with metal hydride (as lithium aluminum hydride, hydrogenation two (isobutyl-) aluminium, sodium borohydride, diborane etc.) reduction, can obtain the alcohol of general formula (VIII) representative here.Then; protect the hydroxyl of general formula (VIII) compound by preparation general formula (IX) compound; again in the presence of the mixture of halogenating agent (as iodine, N-bromo-succinimide, N-neoprene imide, iodoxy chlorine etc.) or heavy metal compound (as Silver Nitrate, silver suboxide, silver perchlorate, mercury chloride, cupric chloride, cupric oxide etc.) or these compounds with two thioketals part hydrolysis in water-containing solvent of general formula (IX) compound, obtain the ketone compound of general formula (X) representative.

With the metal-hydrogen title complex (as lithium aluminum hydride, hydrogenation three (tert.-butoxy) aluminium lithium, sodium borohydride, hydrogenation three (sec-butyl) boron lithium, lithium borohydride etc.) or metal hydride (as hydrogenation (diisobutyl) aluminium, diborane etc.) make reductive agent, at solvent such as hydrocarbon type solvent (as pentane, hexane, heptane, sherwood oil, benzene, toluene, ethylbenzene etc.), the halogenated hydrocarbon type solvent is (as methylene dichloride, chloroform etc.), ether type solvent is (as ether, tetrahydrofuran (THF) etc.), alcohol type solvent is (as methyl alcohol, ethanol etc.), in the mixture of water or above-mentioned solvent, under-100 ℃ to 50 ℃ temperature (being preferably-80 ℃ to 30 ℃),, obtain the compound of general formula (XI) representative with the compound reduction of general formula (X) representative.In this reaction, can preferentially obtain a kind of steric isomer by the kind and the reaction conditions of selective reduction agent, for example, if with sterically hindered less reductive agent by following reaction formula (6) reduce general formula (X a) represent 2, the trans cyclobutanone of 3-:

(in this reaction formula, R ⁴Represent hydrogen atom or blocking group), selectivity generates 1 of general formula (XI b) representative, the trans alcohol of 2-.But, if reduce with sterically hindered big reductive agent, preferentially generate general formula (XI a) representative 1, the 2-cis-alcohol.For example, if with hydrogenation three (tert.-butoxy) aluminium lithium or sodium borohydride (the sterically hindered of these two kinds of reductive agents is not very big) reduction (2S, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-1-cyclobutanone, selectivity generates (1R, 2S, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-cyclobutanol (isolation yield is respectively 88% and 80%), if with hydrogenation three (sec-butyl) boron lithium or hydrogenation two (isobutyl-) aluminium (these two kinds of reductive agents sterically hindered all very big) reduction above-claimed cpd, preferential (the 1S that generates, 2S, 3S)-2,3-pair-(tert-butyl diphenyl silyloxy methyl)-cyclobutanol (isolation yield is respectively 75% and 82%).With the table 2 that the results are shown in that obtains.(table is seen the literary composition back)

Here the steric isomer that obtains, be that (XI is compound and general formula (XI b) compound a) for general formula, behind segregation, can easily transform mutually, for example, available oxygenant commonly used and method for oxidation (for example burning agent such as chromic acid/acetic acid, chromic acid/pyridine etc., or methyl-sulphoxide (DMSO) oxidation style such as DMSO-acetic anhydride/acetate, DMSO-oxalyl chloride-triethylamine/methylene dichloride etc.) (XI a) compound or (XI b) compound oxidation becomes general formula (X is the ketone of representative a) with general formula, and then with oxidation products (X is selective reduction a), in addition, for instance, can (XI is the steric configuration conversion of the 1-carbon atom that links to each other with hydroxyl in compound or general formula (XI b) compound a) with general formula by Mitsunobu reaction.Now, reaction makes an explanation to the Mitsunobu in the aforesaid method.General formula (XI a) or the compound of (XI b) representative at solvent such as hydrocarbon type solvent (as pentane, hexane, heptane, sherwood oil, benzene, toluene, ethylbenzene etc.,), halogenated hydrocarbon solvent is (as methylene dichloride, chloroform etc.), ether type solvent is (as ether, tetrahydrofuran (THF) etc.) or in the mixture of above-mentioned solvent, following and trivalent phosphorous compound and triphenyl phosphine in-100 ℃ to 50 ℃ temperature of reaction (being preferably-50 ℃ to 30 ℃), trimethyl phosphite, triethyl-phosphite etc., carboxylic acid such as acetate, phenylformic acid etc., and reactions such as azodiformate such as diethyl azodiformate generate ester.Then, with alkali such as salt of wormwood, sodium hydroxide, sodium methylate, ammonia etc. or sour example hydrochloric acid, sulfuric acid etc. with above-mentioned ester hydrolysis, or above-mentioned ester is reduced with metal-hydrogen title complex such as lithium aluminum hydride, hydrogenation three (sec-butyl) boron lithium, lithium borohydride etc. or metal hydride such as hydrogenation two (isobutyl-) aluminium, diborane etc., handle by this step, (XI is the compound of representative a) can to obtain the compound of general formula (XI b) representative or general formula.For example; if in benzene, make (1R; 2S; 3S)-2; 3-pair-(tert-butyl diphenyl siloxy-methyl)-cyclobutanol and triphenylphosphine, phenylformic acid and diethyl azodiformate reaction; generate (1S; 2S, 3S)-1-benzoyl-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-tetramethylene; in toluene, use hydrogenation two (isobutyl-) the aluminium reducing latter then; can the cancellation benzoyl, obtain (1S, 2S; 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-cyclobutanol.Be converted into leavings group by the secondary hydroxyl in general formula (XI) compound that will obtain thus, can obtain the compound of general formula (V) representative.

Following experimental example will illustrate that compound of the present invention has very strong, blanket antiviral activity and antitumour activity.

Experimental example 1

With the antiviral activity of following method check The compounds of this invention to herpes simplex 1 C-type virus C (HSV-I) and herpes simplex 2 C-type virus Cs (HSV-II) (these two kinds of viruses all belong to dna virus).

Method 1:

Use the 100-150PFU(PFUC) virus infection 6 hole porous plates on one deck Vero cell (obtaining) from the nephrocyte of cercopithecus aethiops.After 1 hour, cover the nutrient agar (the Eagle MEM substratum that contains 1.5% agar) that one deck contains the sample of various concentration in 37 ℃ of absorption, containing 5%(V/V in 37 ℃) cultivation 48 hours in the insulation can of carbonic acid gas.Measure the patch that forms, determine 50% amount of suppression (IC thus ₅₀).

Experimental example 2

With the antiviral activity of following method check The compounds of this invention to the human body cytomegalovirus (HCMV) that belongs to dna virus.

Method 2:

Measure anti-HCMV activity as follows, with the HCMV(A0169 strain of 100PFU) infect one deck human embryo inoblast on the 35mm ware.Adsorb after 1 hour, cover the substratum (0.5% agarose, 2% N of tire serum) that one deck contains the sample compound of various concentration, containing 5%(V/V in 37 ℃) cultivation 10 days in the insulation can of carbonic acid gas.Measure the patch that forms, determine 50% amount of suppression (IC thus ₅₀).

Experimental example 3

With the antiviral activity of following method check The compounds of this invention to the hepatitis B virus (HBV) that belongs to dna virus.

Method 3:

According to Dulbecco method (the Proc.Natl.Acad.Sci. U.S., 84,444(1987)), in the presence of 10% N of tire serum, 200 mcg/ml G418,100 mcg/ml penicillin and 100 mcg/ml Streptomycin sulphates, in 37 ℃ of temperature and 5%CO ₂Under the concentration, cultivation can produce and discharge the liver cell line HB611 through cultivating of active hepatitis B virus in the Eagle of modification substratum (GIBCO).Nutrient solution is inoculated on 6 orifice plates, and every hole (35mm) has 5 * 10 ⁴Individual cell.After 1-2 days, reach 50% and merge, add the sample compound of predetermined amount and continue cultivation.After this, continue to cultivate 15 days, wherein upgraded substratum with the fresh culture that contains same chemical ingredients every 3 days.Then, remove substratum, handle cell paste 1 hour with the molten born of the same parents' damping fluid of 0.5ml (10mM Tutofusin tris (Tris) HCl, pH7.8/5mM sodium ethylene diamine tetracetate, 1%SDS/0.1mg/ml PRONASE A K) and with its dissolving in 37 ℃.The DNA that obtains is thus purified by rnase processing, phenol-chloroform processing and ethanol sedimentation.

Then, 5 micrograms of DNA are carried out the Hind III handle, again according to the Southern method with ³²The hepatitis B virus DNA of P mark is a probe analyzing DNA model.

Experimental example 4

With the antiviral activity of following method check The compounds of this invention to the HIV (human immunodeficiency virus) (HIV) that belongs to dna virus.

Method 4:

On one 24 porose discs, introduce MT-4 cell (about 50,000 cells/ml), add the solution that about 100 micrograms contain the predetermined amount sample compound.Containing 5%(V/V in 37 ℃) cultivated 2 hours in the insulation can of carbonic acid gas.Then, add 10 ³-10 ⁴The HIV of infectious unit also cultivated 4 days, more a part of nutrient solution was placed on the slide glass, with acetone fixed and measure the growth of virus antigen with fluorescent antibody technique.

With AIDS VICTIMS's serum primary antibody as fluorescent antibody technique.With the different sulphur hydracid of FITC(fluorescein) the human body IgG(immunoglobulin G of mark) as secondary antibody.

Experimental example 5

Check The compounds of this invention to human body cervical cancer HeLa S with following method ₃The antitumour activity of the sick P388 cell of cell, mouse leukemia L1210 cell and human white blood.

Method 5:

With HeLa S ₃Cell is mixed with suspension (7.5 * 10 ³Cells/ml).This suspension is poured on (0.2 milliliter/hole) on-96 hole flat boards.After cultivating 24 hours in 37 ℃ of insulation cans that containing 5% carbonic acid gas, add 10 microlitre samples, cultivated again 72 hours.Then, from each aperture, take out nutrient solution, fix, add the solution of 0.05% methylenum coeruleum/10mA-Tris-HCl(pH=8.5), at room temperature dyeed 30 minutes with the amount in 0.1 milliliter/hole with methyl alcohol.Take out liquid after the dyeing with vent fan from each hole, with pure water washing three times, the amount with 0.2 milliliter/hole adds 3%HCl then, and the mixture that sealing obtains left standstill under room temperature about 24 hours, extracted pigment from cell.Measure of the photoabsorption of each hole with Dynatic Microplate Reader, according to the generation inhibiting rate (%) of following Equation for Calculating under various concentration at 660nm.The result who obtains is marked on the logarithmic coordinate paper, can determines 50% inhibition concentration (IC thus ₅₀, mcg/ml).

Growth inhibition ratio (%)=(1-A ₁/ A ₀) * 100

Wherein, A ₁=in the absorption of treatment group,

A ₀=in the absorption of control group.

Method 6:

P388 and L1210 cell are poured on 24 orifice plates, behind the adding sample, in the insulation can that contains 5% carbonic acid gas, cultivated 48 hours at 37 ℃.After the cultivation, measure the number of cell with coal tar counter.By the growth inhibition ratio (based on control group) of following Equation for Calculating treatment group, determine 50% inhibition concentration (IC thus ₅₀, mcg/ml).What obtain the results are shown in table 3.(table is seen the literary composition back)

Growth inhibition ratio (%)=[1-(N _T-N ₀)/Nc-No] * 100

Wherein, N _TThe cell count of=treatment group,

Cell count when No=begins to cultivate,

The cell count of Nc=control group.

Experimental example 6

The activity that (compound 11) anti-herpes simplex 2 C-type virus Cs of working sample in the mouse body (HSV-2) infect.In Balb/C mouse (6 ages in week, male) intraperitoneal inoculation HSV-2 strain 186, its amount is every mouse 4.8 * 10 ⁵PFU/0.2ml.Sample is mixed with salt solution, after infecting 6 hours, press predetermined dose oral (P.O.) or peritoneal injection (i.p.) every day once, amount to 10 days, mortality ratio was monitored with 20 days in the inoculation back, characterized the effect of sample with the prolongation of survival time and the number of surviving.With Aciclovir(ACV: the merchant sells antiviral agent) compare sample.

With the table 4 that the results are shown in that obtains.(table is seen the literary composition back)

Activity in vivo for appraisal compound 11 compares itself and ACV.No matter by which kind of administration, compound 11 can more effectively reduce the mortality ratio (seeing Table 4) with the HSV mice infected.The mice in control group mean survival time was 7.7 days, wide dosage compound 11(1.25-20mg/kg/ days) in the scope, record survival number in 20 day observation period.Also observe survival mice handling the back through ACV, still, use survival number that compound 11 obtains and effective dosage ranges all than big many of use ACV.

Owing to possess very strong antiviral activity, the The compounds of this invention of logical formula IV representative is effective to controlling some virus diseases, the example of these virus diseases such as herpes labialis, genital herpes, zoster, simplexvirus 1 and 2(HSV-I, II), varicella zoster virus (VZV), cytomegalovirus (CMV) and epstein-barr virus (EB) (EBV) simplex infection, viral hapatitis, viral respiratory illness, viral chylopoietic disease, AIDS, ATL etc.In addition, because The compounds of this invention has antitumour activity, their useful asticancer agents.

To do antiviral with the The compounds of this invention of method for preparing or during cancer therapy drug, to warm-blooded animal can be taken orally, intravenous administration or subcutaneous administration, although dosage changes with factors such as the age of symptom, warm-blooded animal and medications, but dosage is generally 0.1-500mg/kg/ days, The compounds of this invention can be taken after being prepared into composition with suitable mixed with excipients.At least the formulation of composition can be tablet, granule, pulvis, capsule, injection liquid, creme, suppository etc.

Specify the preparation method of The compounds of this invention below by following embodiment.

Embodiment 1

The preparation of (-)-(2S, 3S)-3-methoxycarbonyl-1,1-is two-(methylthio group)-2-(oxazolidine-2-ketone-3-yl)-carbonyl tetramethylene

Embodiment 1-1

Under argon atmospher, with 80ml 1,3; 5-trimethylbenzene (TMB) be added to dichloro diisopropoxy titanium (905mg, 3.8mmol) and (2S, 3S)-2; 3-O-(1-phenyl ethylidene)-1,1,4; 4-tetraphenyl-1,2,3; 4-butantetraol (compd A) (2.22g; 4.2mmol) in, at room temperature stirred the mixture 30 minutes, then; in the solution that obtains, add mealy molecular sieve 4A(3.2g); stir and moments later add 3-[(E)-the 3-(methoxycarbonyl)-acryl]-(3.98g 20mmol), is cooled to the suspension that obtains-15 ℃ to oxazolidine-2-ketone again; then; slowly adding is dissolved in 1 among the 20mlTMB, 1-pair-(methylthio group) ethene (3.61g, 30mmol) solution; under agitation; rise to 0 ℃ with 3 hours temperature, in reaction mixture, add saturated aqueous solution of sodium bicarbonate, with diatomite elimination inorganics whole mixture; use the ethyl acetate extraction organism; wash extraction liquid with saturated aqueous sodium chloride, use anhydrous sodium sulfate drying, remove solvent under reduced pressure.(ethyl acetate: hexane=1: 2, V/V) purification residue obtains (-)-(2S, 3S)-3-methoxycarbonyl-1,1-is two-(methylthio group)-2-(oxazolidine-2-ketone-3-yl)-carbonyl tetramethylene (3.94g, 62%) with silica gel column chromatography.The optical purity of this compound is that 86%ee(sees embodiment 8).

NMR（500MHzFT，CDCl ₃）δ：

2.01（3H，s），

2.10（3H，s）

2.54（1H，dd，J＝9.9，12.3Hz），

2.70（1H，dd，J＝7.9，12.3Hz），

3.86（1H，dt，Jd＝9.9Hz，Jt＝7.9Hz），

3.71（3H，s），

4.02（1H，ddd，J＝6.4，8.9，11.0Hz），

4.12（1H，ddd，J＝7.6，9.3，11.0Hz），

4.29-4.47（2H，m），

5.01（1H，d，J＝7.9Hz）。

IR(is pure) cm ^-1: 1780,1730,1690.

Embodiment 1-2

Press and embodiment 1-1 similar methods; make 3-[(E)-the 3-(methoxycarbonyl)-acryl]-oxazolidines-2-ketone (3.98g; 20mmol); 1; 1-pair-(methylthio group) ethene (3.61g; 30mmol); dichloro diisopropoxy titanium (474mg, 2.0mmol); (2S, 3S)-2; 3-O-(1-phenyl ethylidene)-1; 1,4,4-tetraphenyl-1; 2; 3,4-butantetraol (compd A) (1.16g, 2.2mmol) and mealy molecular sieve 4A(4g) is under 0 ℃; reaction is 40 minutes in the mixed solvent of being made up of toluene (160ml) and hexane (120ml); obtain (-)-(2S, 3S)-3-methoxycarbonyl-1,1-pair-(methylthio group)-2-(oxazolidine-2-ketone-3-yl)-carbonyl tetramethylene (6.13g; 96%) [[α]=-10.4 ° (C1.34, CH ₂Cl ₂)].With its recrystallization in methylene dichloride-isopropyl ether system, obtain compound ([α] _D=-11.1 ° of (C1.15, CH ₂Cl ₂)), productive rate is 5.30g(83%), to measure with the method described in the embodiment 8, the optical purity of this compound is 98%ee or higher.

Embodiment 1-3

Press and embodiment 1-1 similar methods; make 3-[(E)-the 3-(methoxycarbonyl)-acryl]-azoles alkane-2-ketone (19.9g; 100mmol); 1; 1-pair-(methylthio group) ethene (15.03g; 125mmol); dichloro diisopropoxy titanium (1.18g; 5.0mmol); (2S, 3S)-2,3-O-(1-phenyl ethylidene)-1; 1; 4,4-tetraphenyl-1,2; 3; 4-butantetraol (compd A) (2.91g, 5.5mmol) and mealy molecular sieve 4A(20g) is under 0 ℃, and reaction is 5 hours in the mixed solvent of being made up of toluene (800ml) and hexane (600ml); obtain (-)-(2S; 3S)-and 3-methoxycarbonyl-1,1-pair-(methylthio group)-2-(oxazolidine-2-ketone-3-yl)-carbonyl tetramethylene (26.69g, 84%) ([α] _D=-10.5 ° of (C1.00, CH ₂Cl ₂)).

Embodiment 2

The preparation of (+)-(2R, 3R)-methoxycarbonyl-1,1-is two-(methylthio group)-2-(oxazolidine-2-ketone-3-yl)-carbonyl tetramethylene

Under argon atmospher, with dichloro diisopropoxy titanium (125mg, 0.53mmol), (2R, 3R)-2,3-O-(1-phenyl ethylidene)-1,1,4,4-tetraphenyl-1,2,3,4-butantetraol (compd B) (305mg, 0.58mmol) and toluene (5ml) mix, at room temperature stirred 1 hour.In the part of the solution that taking-up obtains (0.5ml, 0.0053mmol) and be added to mealy molecular sieve 4A(100mg), add toluene (1.5ml).In the suspension that obtains, add 3-[(E)-the 3-(methoxycarbonyl)-acryl] (107mg 0.534mmol) and sherwood oil (about 80 ℃ of boiling point) (PE) (2ml), is cooled to 0 ℃ with the mixture that obtains to-oxazolidines-2-ketone.In this suspension, slowly be incorporated in PE(1.5ml) in 1,1-pair-(methylthio group) ethene (115mg, 0.956mmol) solution, under 0 ℃, stirred the mixture 3 hours, then, add 0.2M phosphate buffered saline buffer (pH=7) to above-mentioned reaction mixture, with diatomite elimination inorganics, use the ethyl acetate extraction organism again, wash extraction liquid with saturated aqueous sodium chloride, use anhydrous sodium sulfate drying, remove solvent under reduced pressure, with silica gel thin-layer chromatography (ethyl acetate: hexane=1: 1, V/V) purification residue, obtain (+)-(2R, 3R)-3-methoxycarbonyl-1,1-pair-(methylthio group)-2-oxazolidine-2-ketone-3-yl)-carbonyl tetramethylene (162mg, 95%).The chemical purity of this product is that 98%ee(is referring to embodiment 9).

The NMR of this product and IR data are identical with embodiment 1 compound.

Embodiment 3

The preparation of (+)-(2R, 3R)-3-methoxycarbonyl-1,1-is two-(methylthio group)-2-(oxazolidine-2-ketone-3-yl)-carbonyl tetramethylene

Following table (seeing the literary composition back) illustrates the result of gained under preparation this compound (comprising embodiment 2) condition, and other treatment condition are identical with embodiment 1 or 2 with method.

A) OXz is oxazolidine-2-ketone-3-base group.

B) TiCl ₂(different-PeO) ₂Mixture (1.0: 1.1) with compd B.

C) optical purity is that the NMR of the two-MTPA ester by compound (VII) measures.

D) TMB=1,3, the 5-trimethylbenzene.

E) T-PE=toluene-sherwood oil.

Embodiment 4

(+)-1,1-is two-(methylthio group)-2-(oxazolidine-2-ketone-3-yl)-preparation of carbonyl tetramethylene

Repeat the reaction of embodiment 2; different is to replace 3-[(E with 3-acryl-oxazolidines-2-ketone)-the 3-(methoxycarbonyl) acryl]-oxazolidines-2-ketone; obtain (+)-1,1-pair-(methylthio group)-2-(oxazolidine-2-ketone-3-yl)-carbonyl tetramethylene (82%).The optical purity of this product is that 88%ee(is referring to embodiment 10).

NMR（500MHzFT，CDCl ₃）δ：

2.00（3H，s），

2.12（3H，s），

2.26-2.33（1H，m），

2.34-2.38（1H，m），

2.39-2.48（1H，m），

2.52-2.61（1H，m），

4.00-4.13（2H，m），

4.41（2H，t，J＝8.0Hz），

4.63（1H，m）。

Embodiment 5

(-)-(2S, 3S)-2,3-is two-(methoxycarbonyl)-1, and 1-is two-methylthio group)-preparation of tetramethylene

Embodiment 5-1

Under argon atmospher, with 1M dimethoxy magnesium/methyl alcohol (25ml, 25mmol) be added to (-)-(2S that obtains among the embodiment 1-1,3S)-3-methoxycarbonyl-1,1-pair-(methylthio group)-2-(oxazolidine-2-ketone-3-yl)-(3.94g also at room temperature stirred 1 hour in methanol solution 12.3mmol) (25ml) the carbonyl tetramethylene.The concentrating under reduced pressure reaction mixture adds ammonium chloride saturated aqueous solution to concentrated solution, uses extracted with diethyl ether.Wash ether extraction liquid with saturated aqueous sodium chloride, remove solvent then under reduced pressure, with silica gel column chromatography (ethyl acetate: hexane=1: 9, V/V) purification residue, obtain (-)-(2S, 3S)-2,3-pair-(methoxycarbonyl)-1,1-pair-(methylthio group) tetramethylene (2.17g, 67%).The optical purity of this compound is that 86%ee(is referring to embodiment 8).

NMR（500MHzFT，CDCl ₃）δ：

2.01（3H，s），

2.12（3H，s），

2.47（1H，dd，J＝9.0，12.2Hz），

2.50（1H，dd，J＝9.4，12.2Hz），

3.63-3.75（2H，m），

3.69（3H，s），

3.72（3H，s），

IR(is pure) cm ^-1: 1730.

Embodiment 5-2

Under argon atmospher, in 0 ℃ with (-)-(2S, 3S)-and 3-methoxycarbonyl-1,1-pair-(methylthio group)-2-(oxazolidine-2-ketone-3-yl)-(26.0g 81.4mmol) is added to 1M dimethoxy magnesium/methyl alcohol (400ml to the carbonyl tetramethylene, 400mmol), under this temperature, stirred the mixture 15 minutes, and added ammonium chloride saturated aqueous solution, use extracted with diethyl ether to reaction mixture, behind saturated aqueous sodium chloride washing extraction liquid, remove solvent under reduced pressure.With silica gel column chromatography (ethyl acetate: hexane=1: 9, V/V) purification residue, obtain (-)-(2S, 3S)-2,3-is two-(methoxycarbonyl)-1,1-is two-(methylthio group) tetramethylene (20.73g, 96%).

Embodiment 6

(+)-(2R, 3R)-2,3-pair-(methoxycarbonyl)-1, the preparation of 1-pair-(methylthio group)-tetramethylene

Repeat the operation of embodiment 5-2, different obtains (+)-(2R with embodiment 2,3R)-3-methoxycarbonyl-1,1-is two-(methylthio group)-2-(oxazolidine-2-ketone-3-yl)-the carbonyl tetramethylene makes raw material, obtain (+)-(2R, 3R)-2,3-pair-(methoxycarbonyl)-1,1-pair-(methylthio group)-tetramethylene, productive rate is 95%, and the optical purity of this compound is that 98%ee(is referring to embodiment 9).

The NMR of this compound and IR data are identical with embodiment 5 compounds.

Embodiment 7

(+)-2-methoxycarbonyl-1, the preparation of 1-pair-(methylthio group)-tetramethylene

Repeat the operation of embodiment 6, different obtains (+)-1 with embodiment 4,1-pair-(methylthio group)-2-(oxazolidine-2-ketone-3-yl)-the carbonyl tetramethylene is a raw material, obtain (+)-2-methoxycarbonyl-1,1-pair-(methylthio group)-tetramethylene, productive rate is 83%, and the optical purity of this compound is that 88%ee(is referring to embodiment 10).

NMR（500MHzFT，CDCl ₃）δ：

1.97（3H，s），

2.07（3H，s），

2.18-2.30（3H，m），

2.49（1H，m），

3.37（1H，m），

3.67（3H，s）。

Embodiment 8

(-)-(2S, 3S)-2,3-pair-(methylol)-1, the preparation of 1-pair-(methylthio group)-tetramethylene

Under argon atmospher, in 0 ℃ of (-)-(2S with embodiment 5-1 preparation, 3S)-2,3-pair-(methoxycarbonyl)-1,1-pair-(methylthio group) tetramethylene (1.96g, diethyl ether solution 7.4mmol) (10ml) slowly is added to lithium aluminum hydride (562mg, 14.8mmol) in ether suspension, the mixture that obtains was stirred 2 hours at 0 ℃, add the reductive agent of sodium sulfate saturated aqueous solution, add anhydrous sodium sulphate and stirring then for a moment with decomposing excessive to reaction mixture.Then, the elimination inorganics is also used hot washed with isopropyl alcohol, merging filtrate and washings remove solvent under reduced pressure, with silica gel column chromatography (ethyl acetate: hexane: methyl alcohol=15: 20: 1, V/V/V) purification residue, obtain (-)-(2S, 3S)-2,3-pair-(methylol)-1, two (the methylthio group)-tetramethylene (1.48g, 96%) of 1-.

NMR（270MHzFT，CDCl ₃）δ：

2.02（1H，dd，J＝9.1，12.1Hz），

2.05（3H，s），

2.06（3H，s），

2.28（1H，dd，J＝8.1，12.1Hz），

2.47-2.68（2H，m），

3.26（2H，brs），

3.54（1H，dd，J＝8.8，10.3Hz），

3.67-3.77（2H，m），

3.83（1H，dd，J＝5.0，10.4Hz），

IR(is pure) cm ^-11: 3350.

Take out a part of above-claimed cpd, with (R)-α-methoxyl group-α-trifluoromethyl-phenyl Acetyl Chloride 98Min. (that (R)-MTPACl) and Dimethylamino pyridine (DMAP)/pyridine (Pyr) is translated into by ordinary method is two-(R)-the TMPA ester.

Carry out nuclear magnetic resonance spectroscopy in 500MHz, 1,852,1,856,1,912 and 1,970ppm observes at the place four methyl signals from racemic mixture, wherein, and in 1,852 and 1, the signal at 912ppm place is stronger than other, and can measure optical purity thus is 86%ee.

Can be by recrystallization in ethyl acetate-hexane system, with title compound (-)-(2S, 3S)-2,3-pair-(methylol)-1,1-pair-(methylthio group)-tetramethylene is converted into the crystal ([α] with 100% optical purity _D=-32.0 ° of (C1.03, CH ₂Cl ₂)).

Embodiment 9

(+)-(2R, 3R)-2,3-pair-(methylol)-1, the preparation of 1-pair-(methylthio group)-tetramethylene

Repeat the operation of embodiment 8, different with embodiment 6 preparation (+)-(2R, 3R)-2,3-pair-(methoxycarbonyl)-1,1-pair-(methylthio group)-tetramethylene is a raw material, obtains (+)-(2R, 3R)-2,3-pair-(methylol)-1,1-pair-(methylthio group)-tetramethylene, productive rate is 70%.

The NMR of this compound and IR data are identical with embodiment 8 compounds.

Take out this compound of a part, ((R)-MTPACl DMAP/Pyr) is translated into (R)-TMPA ester with ordinary method.

According to the NMR of the method research product of embodiment 8, find 1,856 and 1, the signal at 970ppm place than other by force, optical purity is 98%ee.

Except above-mentioned points, also, obtain clear crystal with a part of title compound recrystallization from ethyl acetate-hexane system, by its monocrystalline X-ray analysis, confirm its absolute space be configured as (2R, 3R), shown in title.

Embodiment 10

(+)-2-methylol-1, the preparation of 1-pair-(methylthio group)-tetramethylene

Repeat the operation of embodiment 8, different with embodiment 7 preparation (+)-2-methoxycarbonyl-1,1-pair-(methylthio group)-tetramethylene is a raw material, obtains (+)-2-methylol-1,1-pair-(methylthio group)-tetramethylene, productive rate is 54%.

NMR（500MHzFT，CDCl ₃）δ：

1.92（1H，m），

2.05（3H，s），

2.07（3H，m），

2.12-2.32（4H，m），

2.68（1H，m），

3.73（1H，dd，J＝4.8，11.8Hz），

3.84（1H，dd，J＝7.5，11.8Hz）。

Take out this compound of a part, ((R)-MTPACl DMAP/Pyr) is translated into (R)-MTPA ester with ordinary method.

Carry out nuclear magnetic resonance spectroscopy in 500MHz, 1,696,1,927,1,930 and 1,955ppm observes at the place four methyl signals from racemic mixture, wherein, in 1.927 and 1, the signal at 955ppm place is stronger than other, and can measure optical purity thus is 88%ee.

Embodiment 11

(+)-(2S, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-1, the preparation of 1-pair-(methylthio group)-tetramethylene

With (-)-(2S, 3S)-2,3-pair-(methylol)-1,1-pair-(methylthio group)-tetramethylene (1.37g, 6.58mmol), triethylamine (2.8ml, 20mmol), 4-dimethyl aminomethyl pyridine (catalytic amount) and dimethyl formamide (DMF) (1ml) be dissolved in the methylene dichloride (25ml).Then, (4.52g 25mmol) and at room temperature stirs all night to add t-butyldiphenylsilyl chlorine in the solution that obtains.Behind the concentrating under reduced pressure reaction mixture, concentrated solution is dissolved in ether, with saturated aqueous sodium chloride washing and use anhydrous sodium sulfate drying, from diethyl ether solution, steam desolventize after, usefulness silica gel column chromatography (ether: hexane=1: 20, V/V) purification residue, obtain (+)-(2S, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-1,1-pair-(methylthio group)-tetramethylene (4.50g, 100%)

NMR（200MHzFT，CDCl ₃）δ：

0.99（9H，s），

1.02（9H，s），

2.06（6H，s），

2.09-2.25（2H，m），

2.85（1H，m），

3.52-3.73（3H，m），

3.90（1H，dd，J＝9.0，10.8Hz），

7.26-7.47（12H，m），

7.55-7.74（8H，m），

Embodiment 12

(-)-(2R, 3R)-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-1, the preparation of 1-pair-(methylthio group) tetramethylene

With t-butyldiphenylsilyl chlorine (292mg, 1.06mole) be added to (+)-(2R, 3R)-2,3-pair-(methylol)-1,1-pair-(methylthio group)-tetramethylene (82mg, 0.39mmol), imidazoles (106mg, 1.55mmol) and 4-dimethyl aminomethyl pyridine (catalytic amount) in DMF(4ml) in solution in, at room temperature stir all night the mixture that obtains.After in reaction mixture, adding 2M phosphate buffered saline buffer (pH=7.0), use ethyl acetate extraction.The extraction liquid of the saturated aqueous solution of water and sodium-chlor washing successively, use anhydrous sodium sulfate drying, remove solvent then under reduced pressure, with preparation property silica gel thin-layer chromatography (ethyl acetate: hexane=1: 10, V/V) purification residue obtains (-)-(2R, 3R)-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-1,1-pair-(methylthio group)-tetramethylene (266mg, 100%).

The NMR of this compound and IR data are identical with embodiment 11 compounds.

Embodiment 13

(+)-(2S, 3S)-2, the preparation of 3-pair-(tert-butyl diphenyl siloxy-methyl)-1-cyclobutanone

With N-neoprene imide (1.60g, 12mmol) and Silver Nitrate (2.29g, 13.5mmol) be dissolved in 80% the acetonitrile solution (45ml), in 25 ℃ of (+)-(2S that are incorporated in rapidly in the mixed solvent of forming by acetonitrile (6ml) and methylene dichloride (1ml), 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-1,1-pair-(methylthio group)-tetramethylene (2.06g, 3mmol) solution stirs the mixture that obtains 10 minutes.Add the 3ml sodium sulfite saturated aqueous solution and stirred 1 minute to reaction mixture, add saturated aqueous solution of sodium bicarbonate (3ml) then and stirred 1 minute, add saturated aqueous sodium chloride (3ml) again and stirred 1 minute.Then, to above-mentioned solution add 60ml methylene dichloride and hexane mixture (1: 1, V/V), use Hyflo ^R(making) elimination insolubles by Johns-Manville Co., after anhydrous sodium sulfate drying filtrate, remove solvent under reduced pressure, with silica gel column chromatography (ether: hexane=1: 10, V/V) purification residue, obtain (+)-(2S, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-1-cyclobutanone (1.49g, 82%).

NMR（270MHzFT，CDCl ₃）δ：

1.02（9H，s），

1.04（9H，s），

2.74-3.05（2H，m），

3.29（1H，m），

3.69（1H，dd，J＝3.7，10.6Hz），

3.82（1H，dd，J＝4.8，10.3Hz），

3.88（1H，dd，J＝4.8，10.3Hz），

3.97（1H，dd，J＝4.0，10.6Hz），

7.32-7.44（12H，m），

7.62-7.68（8H，m），

IR(is pure) cm ^-1: 1785.

Embodiment 14

(-)-(2R, 3R)-2, the preparation of 3-pair-(tert-butyl diphenyl siloxy-methyl)-1-cyclobutanone

Repeat the operation of embodiment 13, different is with (-)-(2R, 3R)-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-1,1-pair-(methylthio group)-tetramethylene is made raw material, obtain (-)-(2R, 3R)-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-1-cyclobutanone, productive rate is 99%.

The NMR of this compound and IR data are identical with embodiment 13 compounds.

Embodiment 15

2, the preparation of 3-pair-(tert-butyl diphenyl siloxy-methyl)-cyclobutanol

Embodiment 15-1

Under argon atmospher, with hydrogenation three-(tert.-butoxy)-aluminium lithium (1.27g, 5.0mmol) be added to tetrahydrofuran (THF) (THF) (10ml) in and be cooled to-78 ℃, add greater than (+) among the THF-(2S to this suspension, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-1-cyclobutanone (1.21g, 2.0mmol) solution, under agitation the temperature of mixture is slowly risen to room temperature through a few hours, add the reductive agent of 0.2M phosphate buffered saline buffer to reaction mixture, add methylene dichloride and elimination inorganics then with decomposing excessive.Use dichloromethane extraction filtrate, use the anhydrous sodium sulfate drying dichloromethane layer, steaming desolventizes then, isolates residue and uses silica gel column chromatography (ethyl acetate: hexane=1: 9～1: 4, V ¹/ V) purify, obtain (+)-(1S, 2S, 3S)-2,3-pair-(tert-butyl diphenyl silicomethane oxygen methyl)-cyclobutanol (0.104g, 9%):

NMR（200MHzFT，CDCl ₃）δ：

1.00（9H，2），

1.07（9H，s），

1.97-2.25（2H，m），

2.32（1H，m），

2.48（1H，m），

3.17（1H，d，J＝7.3Hz），

3.56（2H，d，J＝5.8Hz），

3.88（1H，dd，J＝5.6，11.4Hz），

3.98（1H，dd，J＝4.0，11.4Hz），

4.46（1H，m），

7.26-7.48（12H，m），

7.54-7.72（8H，m），

And (+)-(1R, 2S, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-cyclobutanol (1.068g, 88%):

NMR（200MHzFT，CDCl ₃）δ：

1.03（9H，s），

1.04（9H，s），

1.60-1.73（2H，m），

1.92（1H，m），

2.10-2.37（2H，m），

3.52-3.70（3H，m），

3.77（1H，dd，J＝4.5，10.4Hz），

4.03（1H，m），

7.27-7.46（12H，m），

7.56-7.69（8H，m）。

Embodiment 15-2

Under argon atmospher, in-78 ℃ with 1M diisobutylaluminium hydride/methyl (8.2ml, 8.2mmol) slowly be added to (+)-(2S in toluene (70ml), 3S)-2,3-is two-(tert-butyl diphenyl siloxy-methyl)-1-cyclobutanone (4,12g, 6.8mmol) in the solution, under said temperature, stirred the mixture 10 minutes, add 0.2M phosphate buffered saline buffer (pH=7) to reaction mixture and also stir a moment, add excessive methylene dichloride and elimination inorganics then.Use dichloromethane extraction filtrate, use anhydrous sodium sulfate drying, steaming desolventizes then.With silica gel column chromatography (ethyl acetate: hexane=1: 9～1: 4, V/V) purification residue, obtain (+)-(1S, 2S, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-cyclobutanol (3.38g, 82%) and (+)-(1R, 2S, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-cyclobutanol (0.69g, 17%).

Embodiment 15-3

(+)-(3S)-2,3-is two for 1R, 2S-(tert-butyl diphenyl siloxy-methyl)-cyclobutanol to (+)-(3S)-2,3-is two for 1S, 2S-conversion of (tert-butyl diphenyl siloxy-methyl)-cyclobutanol

Step 1:

Under argon atmospher; with diethyl azodiformate (217 microlitres; 1.38mmol) be added to (+)-(1R in benzene (10ml); 2S; 3S)-2; 3-pair-(tert-butyl diphenyl siloxy-methyl)-cyclobutanol (700mg; 1.15mmol); phenylformic acid (167mg; 1.37mmol) and triphenyl phosphine (362mg, 1.38mmol) in the solution, the mixture that stirring all night at room temperature obtains; from reaction mixture, steam except that after the volatile constituent; with silica gel column chromatography (ether: hexane=1: 10, V/V) purification residue obtains (+)-(1S; 2S; 3S)-and 1-benzoyl-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-tetramethylene (791mg, 97%).

NMR（200MHzFT，CDCl ₃）δ：

0.97（9H，s），

1.06（9H，s），

2.23-2.40（2H，m），

2.45（1H，m），

2.85（1H，m），

3.71（2H，d，J＝5.4Hz），

3.83（1H，dd，J＝6.1，10.5Hz），

3.99（1H，dd，J＝7.3，10.5Hz），

5.48(1H, tangible q, J=6.5Hz),

7.21-7.45（14H，m），

7.49-7.72（9H，m），

7.98（2H，d，J＝7.1Hz）。

Step 2:

Under argon atmospher; in-78 ℃ with 1M diisobutylaluminium hydride/toluene (2.6ml; 2.6mmol) slowly be added to (+)-(1S in toluene (10ml); 2S, 3S)-1-benzoyl-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-tetramethylene (790mg; 1.1mmol) in the solution; under this temperature, stirred the mixture 30 minutes, and added 0.2M phosphate buffered saline buffer (pH=7) to reaction mixture and also stir a moment, add excessive methylene dichloride and elimination inorganics then.Use dichloromethane extraction filtrate, with the anhydrous sodium sulfate drying dichloromethane layer and therefrom steam and desolventize, isolate resistates and use silica gel column chromatography (ether: hexane=1: 5, V/V) purify, obtain (+)-(1S, 2S, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-cyclobutanol (644mg, 95%).

Embodiment 16

(+)-(1R, 2S, 3S)-2, the preparation of 3-pair-(tert-butyl diphenyl siloxy-methyl)-1-sulfonyloxy methyl oxygen basic ring butane

Under 0 ℃ with methylsulfonyl chloride (0.17ml, 2.2mmol) be added to (+)-(1R in methylene dichloride, 2S, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-cyclobutanol (911mg, 1.5mmol) and triethylamine (0.6ml, 4.3mmol) in the solution, stirred the mixture 15 minutes at 0 ℃, add the 0.2M phosphate buffered saline buffer and use extracted with diethyl ether to reaction mixture, use the anhydrous sodium sulfate drying extraction liquid, steaming desolventizes.With silica gel column chromatography (ethyl acetate: hexane=1: 6, V/V) purification residue, obtain (+)-(3S)-2,3-is two for 1R, 2S-(tert-butyl diphenyl siloxy-methyl)-1-sulfonyloxy methyl oxygen basic ring butane (1.034g, 100%).

NMR（200MHzFT，CDC ₃）δ：

1.04（9H，m），

1.05（9H，m），

2.07-2.23（2H，m），

2.43（1H，m），

2.64（2H，m），

2.91（3H，m），

3.52-3.65（3H，m），

3.76（1H，dd，J＝4.0，11.0Hz），

4.97（1H，m），

7.24-7.48（12H，m），

7.56-7.70（8H，m），

Embodiment 17

(-)-9-[(1S, 2R, 3S)-2,3-is two-(methylol) tetramethylene-1-yl]-preparation of VITAMIN B4 (compound 2)

Step 1:

(+)-9-[(1S, 2R, 3S)-2,3-is two-(tert-butyl diphenyl siloxy-methyl) tetramethylene-1-yl]-preparation of VITAMIN B4

To in DMF(6.5ml) in VITAMIN B4 (177mg, 1.3mmol) add in the suspension 60% sodium hydride (52mg, 1.3mmol).The mixture stirring after 1 hour, is added (+)-(1R, 2S in reaction mixture, 3S)-2,3-is two-tert-butyl diphenyl siloxy-methyl)-solution in the 1-sulfonyloxy methyl oxygen basic ring butane (450mg is 0.65mmol) in DMF(1.5ml), stirred 6 hours in 145 ℃.After the cooling, in mixture, add the 0.2M phosphate buffered saline buffer, use ethyl acetate extraction, use the anhydrous sodium sulfate drying extraction liquid, boil off solvent then.Isolate residue, with silica gel column chromatography (methylene dichloride: methyl alcohol=50: 1～30: 1, V/V) purify, obtain unreacted (+)-(1R, 2S, 3S)-2,3-couple-(tert-butyl diphenyl siloxy-methyl)-1-sulfonyloxy methyl oxygen basic ring butane (100mg reclaims 20%) and (+)-9-[(1S, 2R, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl) tetramethylene-1-yl]-VITAMIN B4 (203mg, 43%).

NMR（400MHzFT，CD ₃OD）δ：

0.75（9H，s），

1.03（9H，s），

2.42-2.54（2H，m），

2.92-3.08（2H，m），

3.53（1H，dd，J＝4.0，11.0Hz），

3.68（1H，dd，J＝8.8，11.0HZ），

3.73-3.85（2H，m）

5.23（1H，m）

7.20-7.46（16H，m），

7.60-7.72（4H，m），

8.18（1H，s），

Step 2:

(+) that in step 1, obtains-9-[(1S, 2R, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl) tetramethylene-1-yl]-VITAMIN B4 (203mg, 0.28mmol) methanol solution (1ml) in add 4N hydrochloric acid/diox (0.15ml, 0.6mmol), at room temperature all night stir said mixture, remove solvent then under reduced pressure, add entry, remove after the ether soluble substance, with the neutralization of 0.1N sodium hydroxide solution, steaming desolventizes.With the crude product that obtains thus with Sephadex LH-20 column chromatography (methyl alcohol: water=1: 1, V/V) purify, use washing with acetone then, obtain (-)-9-[(1S, 2S, 3S)-2,3-pair-(methylol) tetramethylene-1 base]-VITAMIN B4 (compound 2) (26mg, 37%).

NMR（400MHzFT，CD ₃OD）δ：

2.43-2.57（2H，m），

2.78（1H，m），

3.03（1H，m），

3.41（1H，dd，J＝6.2，11.4Hz），

3.46（1H，dd，J＝7.3，11.4Hz），

3.74（2H，d，J＝6.2Hz），

5.25(1H, tangible q, J=8.1Hz),

8.20（1H，s），

8.37（1H，s）。

UVλ _max（H ₂O）nm：

pH1，258;pH7，260;pH13，260。

Embodiment 18

(-)-9-[(1S, 2R, 3S)-2,3-is two-(methylol) tetramethylene-1-yl]-preparation of guanine (compound 5)

Step 1:

(-)-2-amino-9-[(1S, 2R, 3S)-2,3-is two-(tert-butyl diphenyl siloxy-methyl) tetramethylene-1-yl]-the 6-(2-methoxy ethoxy)-preparation of purine

In the suspension in lithium hydride (10mg 1.3mmol) is added to 2-amino-6-(2-methoxy ethoxy)-purine (274mg is 1.3mmol) in DMF(6.5ml), stirred the mixture 1 hour.Then, in reaction mixture, be incorporated in DMF(1.5ml) in (+)-(1R, 2S, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-1-sulfonyloxy methyl oxygen basic ring butane (450mg, 0.65mmol) solution, in 145 ℃ of stirrings 6 hours, after the cooling, add 0.2M phosphate buffered saline buffer and ethyl acetate, the elimination insolubles is used ethyl acetate extraction filtrate again.Use the anhydrous sodium sulfate drying extraction liquid, the elimination solvent.With silica gel column chromatography (ethyl acetate: hexane=5: 1～3: 1, V/V) purification residue, obtain unreacted (+)-(1R, 2S, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-1-sulfonyloxy methyl oxygen basic ring butane (157mg, reclaim 35%) and (-)-2-amino-9-[(1S, 2R, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl) tetramethylene-1-yl]-the 6-(2-methoxy ethoxy)-purine (160mg, 31%).

NMR（400MHzFT，CD ₃OD）δ：

0.79（9H，s），

1.03（9H，s），

2.38-2.40（2H，m），

2.92（1H，m），

2.98（1H，m），

3.54（1H，dd，J＝4.0，11.0Hz），

3.68（1H，dd，J＝8.8，11.0Hz），

3.72-3.85（4H，m），

4.56-4.67（2H，m），

5.18(1H, tangible q, J=8.0Hz),

7.23-7.47（16H，m），

7.50-7.60（4H，m），

8.07（1H，s）。

Step 2:

(-)-9-[(1S, 2S, 3R)-2,3-is two-(methylol) tetramethylene-1-yl]-preparation of guanine (compound 5)

2N hydrochloric acid (1ml) is added to (-)-2-amino-9-[(1S that step 1 obtains, 2R, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl) tetramethylene-1-yl]-the 6-(2-methoxy ethoxy)-purine (140mg, 0.17mmol) in, reflux mixture 1 hour, decompression is steamed from reaction mixture down and is desolventized, add entry, remove ether soluble substance.Then, neutralize with the 0.1N sodium hydroxide solution, steaming desolventizes, with the HP-20 column chromatography (water: methyl alcohol=1: 0～1: 3, V/V) purification residue is with obtaining (-)-9-[(1S behind the washing with acetone, 2R, 3S)-2,3-pair-(methylol) tetramethylene-1-yl]-guanine (compound 5) (15mg, 32%).

NMR（400MHzFT，CD ₃OD）δ：

2.36-2.55（2H，m），

2.72（1H，m），

2.90（1H，m），

3.45（2H，d，J＝7.0Hz），

3.70（2H，d，J＝6.2Hz），

5.05(1H, tangible q, J=8.1Hz),

7.94（1H，s），

UVλ _max（H ₂O）nm：

pH1，253，279（sh）;pH7，252，272（sh）;

pH13，257（sh），267。

Embodiment 19

(+)-(1S, 2S, 3S)-2, the preparation of 3-pair-(tert-butyl diphenyl siloxy-methyl)-1-sulfonyloxy methyl oxygen basic ring butane

Repeat the operation of embodiment 16, different is with (+)-(1S, 2S, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl) cyclobutanol is a raw material, obtains (+)-(1S, 2S with quantitative yield, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-1-sulfonyloxy methyl oxygen basic ring butane.

NMR（200MHzFT，CDCl ₃）δ：

1.04（9H，s），

1.06（9H，s），

2.25-2.53（3H，m），

2.78（1H，m），

2.87（3H，s），

3.65（2H，d，J＝4.0Hz），

3.85（1H，dd，J＝6.3，10.5Hz），

3.93（1H，dd，J＝6.5，10.5Hz），

5.25（1H，m），

7.32-7.50（12H，m），

7.60-7.75（8H，m）。

By recrystallization from ether-hexane system, can obtain crystalline product ([α] _D=+12.0 ° of (C1.01, CH ²Cl ₂)) (optical purity 100%).

Embodiment 20

(-)-9-[(1R, 2R, 3S)-2,3-is two-(methylol) tetramethylene-1-yl]-preparation of VITAMIN B4 (compound 8)

Step 1:

(+)-9-[(1R, 2R, 3S)-2,3-is two-(tert-butyl diphenyl siloxy-methyl) tetramethylene-1-yl]-preparation of VITAMIN B4

(100mg is 0.74mmol) in the suspension with the VITAMIN B4 in 60% sodium hydride (30mg 0.75mmol) is added in DMF(4ml).After stirring the mixture 1 hour, be incorporated in DMF(1.5ml to reaction mixture) in (+)-(1S, 2S, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-1-sulfonyloxy methyl oxygen basic ring butane (254mg, 0.37mmol) solution, in 145 ℃ of stirrings 6 hours, after the cooling, add the 0.2M phosphate buffered saline buffer, use the ethyl acetate extraction mixture, use the anhydrous sodium sulfate drying extraction liquid, steaming desolventizes, with silica gel column chromatography (methylene dichloride: methyl alcohol=30: 1, V/V) purification residue, obtain (+)-9-[(1R, 2R, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl) tetramethylene-1-yl]-VITAMIN B4 (126mg, 47%).

NMR（200MHzFT，CDCl ₃）δ：

0.98（9H，s），

1.06（9H，s），

2.30-2.65（3H，m），

3.07（1H，m），

3.62-3.84（4H，m），

4.81（1H，m），

5.61（2H，brs），

7.20-7.52（12H，m），

7.52-7.75（8H，m），

7.85（1H，s），

8.33（1H，s）.

Step 2:

To (+)-9-[(1R that step 1 obtains, 2R, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl) tetramethylene-1-yl]-VITAMIN B4 (118mg, 0.16mmol) methanol solution (2ml) add 4N hydrochloric acid/diox (0.17ml, 0.65mmol), at room temperature stir the mixture all night.After decompression is steamed from reaction mixture down and is desolventized, add entry and remove ether soluble substance, then, neutralize with the 0.1N aqueous sodium hydroxide solution, steaming desolventizes, with the crude product that obtains thus Sephadex HP-20 column chromatography (water: methyl alcohol=1: 0～1: 1, V/V) purify, and recycle silicon glue column chromatography (methylene dichloride: ethanol=5: 1, V/V) purify, use Sephadx LH-20 column chromatography (methyl alcohol) to purify at last, obtain (-)-9-[(1R, 2R, 3S)-2,3-pair-(methylol) tetramethylene-1-yl]-VITAMIN B4 (compound 8) (37mg, 91%).

NMR（200MHzFT，CD ₃OD）δ：

2.24（1H，m），

2.37(1H, tangible q, J=9.5Hz),

2.62（1H，m），

2.88（1H，m），

3.65-3.74（4H，m），

4.71(1H, tangible q, J=8.5Hz),

8.20（1H，s），

8.26（1H，s），

UVλ _max（H ₂O）nm：

pH1，259;pH7，259;pH13，259。

HRMS（FAB）

Calculate: [C ₁₁H ₁₅N ₅O ₂+ H] ⁺; 250,1304

Actual measurement: 250,1305.

By with this compound recrystallization from ether-methanol system, can obtain crystalline product ([α] _D=-44.7 ° of (C0.98, pyridine) (optical purities: 98% or higher).

By adopting corresponding alkali to repeat the operation of present embodiment, also can obtain compound N o.26, the physico-chemical property of No.29, No.32 and No.35, No.26 and No.32 compound is as follows:

No.26

NMR（200MHzFT，CD ₃OD）δ：

2.30-2.46（2H，m），

2.38（1H，m），

2.57（1H，m），

3.51-3.71（4H，m），

4.54（1H，m），

5.69（1H，d，J＝8.0Hz），

7.80（1H，d，J＝8.0Hz），

UVλ _max（H ₂O）nm：

pH1，268;pH7，268;pH13，267。

No.32

NMR（200MHzFT，CD ₃OD）δ：

1.78-2.14（2H，m），

2.20-2.54（2H，m），

3.50-3.76（4H，m），

4.50（1H，m），

5.91（1H，d，J＝7.4Hz），

7.78（1H，d，J＝7.4Hz），

UVλ _max（H ₂O）nm：

pH1，284;pH7.273;pH13，274。

Embodiment 21

(+)-9-[(1R, 2R, 3S)-two-(methylol) tetramethylene-1-yl]-preparation of guanine (compound 11)

Step 1:

(+)-2-amino-9-[(1R, 2R, 3S)-2,3-is two-(tert-butyl diphenyl siloxy-methyl) tetramethylene-1-yl]-the 6-(2-methoxy ethoxy)-preparation of purine

With lithium hydride (6mg, 0.75mmol) be added in DMF(4ml) and in 2-amino-6-(2-methoxy ethoxy)-purine (155mg, 0.74mmol) in the suspension, stirred the mixture 1 hour, then, be incorporated in DMF(1.5ml to reaction mixture) in (+)-(1S, 2S, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-1-sulfonyloxy methyl oxygen basic ring butane (450mg, 0.65mmol) solution, stirred 6 hours at 145 ℃, after the cooling, add 0.2M phosphate buffered saline buffer and ethyl acetate, the elimination insolubles is used ethyl acetate extraction filtrate.Use the anhydrous sodium sulfate drying extraction liquid, steam then and desolventize, with silica gel column chromatography (methylene dichloride: ethyl acetate=10: 1, V/V) purification residue, obtain (+)-2-amino-9-[(1R, 2R, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl) tetramethylene-1-yl]-the 6-(2-methoxy ethoxy)-purine (88mg, 30%).

NMR（200MHzFT，CDCl ₃）δ：

1.01（9H，s），

1.05（9H，s），

2.25-2.60（3H，m），

2.92（1H，m），

3.44（3H，s），

3.60-3.94（6H，m），

4.50-4.90（5H，m），

7.15-7.55（12H，m），

7.55-7.80（8H，m），

7.67（1H，s）。

As making solvent with dimethyl sulfoxide (DMSO) (DMSO) and hexamethylphosphoramide (HMPA), under 75 ℃ and 100 ℃, react, obtain and use the essentially identical result of DMF.

Step 2:

(+)-9-[(1R, 2R, 3S)-2,3-is two-(methylol) tetramethylene-1-yl]-preparation of guanine (compound 11)

To (+)-amino-9-[(1R that step 1 obtains, 2R, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl) tetramethylene-1-yl]-the 6-(2-methoxy ethoxy)-purine (79mg, 0.10mmol) methanol solution (2ml) add 4N hydrochloric acid/diox (0.1ml, 0.4mmol).At room temperature stir the mixture all night, decompression is steamed from reaction mixture down and is desolventized, and adds entry then, removes ether soluble substance, and steaming desolventizes, and adds 2N hydrochloric acid (2ml), reflux mixture 1 hour.With 1M aqueous sodium hydroxide solution neutralization reaction mixture, use Sephadex HP-20 column chromatography (water: methyl alcohol=1: 0-1: 4 then, V/V) purify, obtain (+)-9-[(1R, 2R, 3S)-2,3-pair-(methylol) tetramethylene-1-yl]-guanine (compound 11) (23mg, 88%).

NMR（200MHzFT，CD ₃CO）δ：

2.18（1H，m），

2.32(1H, tangible q, J=10.0Hz),

2.50（1H，m），

2.79（1H，m），

3.62-3.74（4H，m），

4.54(1H, tangible q, J=8.8Hz),

7.89（1H，s），

UVλ _max（H ₂O）nm：

pH1，253，277（sh）;pH7，253，268（sh）;

pH13，256（sh），267。

HRMS（FAB）

Calculate: [C ₁₁H ₁₅N ₅O ₃+ H] ₊; 266,1253

Actual measurement: 266,1251.

By with this compound recrystallization from water, can obtain crystalline product ([α] _D=+26.5 ° (C0.99,0.1N NaOH)) (optical purity: 98% or higher).

By repeat the operation of present embodiment with corresponding alkali, can similarly obtain compound N o.14, No.17, No.20 and No.23.

Embodiment 22

(1R, 2R, 3S)-and 1-amino-2, the preparation of 3-pair-(tert-butyl diphenyl siloxy-methyl)-tetramethylene

Step 1:

(1R, 2R, 3S)-and 1-azido--2, the preparation of 3-pair-(tert-butyl diphenyl siloxy-methyl)-tetramethylene

Under argon atmospher, with (+)-(1S, the 2S in the sodiumazide (975mg 15mmol) is added in DMF(6ml), 3S)-2,3-pair-(1.03g's (tert-butyl diphenyl siloxy-methyl)-1-sulfonyloxy methyl oxygen basic ring butane 1.5mmol) in the solution, stirred the mixture 2 hours in 120 ℃, after the cooling, the dilute with water reaction mixture is also used extracted with diethyl ether, washes ether extraction liquid with water secondary, washs with saturated aqueous sodium chloride again.Use the anhydrous sodium sulfate drying diethyl ether solution, remove solvent then under reduced pressure, with silica gel column chromatography (methylene dichloride: hexane=1: 4, V/V) purification residue, obtain (1R, 2R, 3S)-1-azido--2,3-pair-(tert-butyl diphenyl siloxy-methyl)-tetramethylene (992mg, quantitative yield).

IR(is pure) cm ^-1: 2100.

NMR（200MHzFT，CDCl ₃）δ：

1.03（9H，s），

1.05（9H，s），

1.91（1H，m），

2.02-2.29（2H，m），

2.44（1H，m），

3.51-3.65（4H，m），

3.71（1H，dd，J＝4.0Hz，10.8Hz），

7.31-7.44（12H，m），

7.57-7.67（8H，m）。

Step 2:

With step 1 obtain (2S)-1-azido--2,3-is two for 1R, 2R-(tert-butyl diphenyl siloxy-methyl)-tetramethylene (992mg) is dissolved in the ethyl acetate (2ml).After adding 10% palladium-carbon (100mg), under nitrogen atmosphere, stirring the mixture all night under the room temperature.Behind the elimination catalyzer, remove solvent under reduced pressure, with silica gel column chromatography (hexane: ethyl acetate: triethylamine=20: 10: 1, V/V/V) purification residue obtains (1R, 2R, 3S)-and 1-amino-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-tetramethylene (642mg, 67%).

NMR（200MHzFT，CDCl ₃）δ：

1.03（9H，s），

1.05（9H，s），

1.42（1H，m），

1.54(2H, brs can with D ₂The O exchange),

1.86-2.05（2H，m），

2.24（1H，m），

3.13（1H，m），

3.54-3.65（3H，m），

3.75（1H，dd，H＝4.1，10.6Hz），

7.27-7.46（12H，m），

7.58-7.69（8H，m）。

Embodiment 23

1-[(1R, 2R, 3S)-2,3-is two-(methylol) tetramethylene-1-yl]-5-methyl-2,4(1H, 3H)-preparation of pyrimidine dione (compound 29)

Step 1:

N-[[(1R, 2R, 3S)-2,3-is two-(tert-butyl diphenyl siloxy-methyl) cyclobutyl] aminocarboxyl]-preparation of 3-methoxyl group-2-Methacrylamide

Under argon atmospher, will in the 3-methoxyl group-2-methacrylic chloride in the dry-out benzene (10ml) (673mg, 5mmol) and cyanic acid (1.50g, 10mmol) suspension returning heating 1 hour is at room temperature left standstill then.Take out the supernatant liquor (2.6ml) of this mixture, in (the 1R that is added under 0 ℃ in dry-out benzene (4ml), 2R, 3S)-1-amino-2,3-pair-(tert-butyl diphenyl siloxy-methyl)-tetramethylene (603mg, 0.99mmol) in the solution, under this temperature, stir the mixture that obtains all night.Then, under decompression, from reaction mixture, steam and desolventize, with silica gel column chromatography (hexane: ether=1: 1, V/V) purification residue, obtain N-[[(1R, 2R, 3S)-2,3-pair-(tert-butyl diphenyl siloxy-methyl) cyclobutyl] aminocarboxyl]-3-methoxyl group-2-Methacrylamide crude product (592mg).

Step 2:

With 1M tetrabutyl ammonium fluoride/THF(2.4ml, 2.4mmol) be added to the N-[[(1R that the step 1 in methyl alcohol (8ml) obtains, 2R, 3S)-2,3-is two-(tert-butyl diphenyl siloxy-methyl) cyclobutyl] aminocarboxyl]-3-methoxyl group-2-Methacrylamide (590mg) solution in, at room temperature stir the mixture all night.After steaming desolventizes from reaction mixture, add entry and ether, water extraction six times.The concentrating under reduced pressure water extract, add 1M phosphoric acid (10ml), reflux mixture 30 minutes, with aqueous sodium hydroxide solution neutralization reaction mixture, with Sephadex HP-20(water-30% aqueous methanol) purify, use Dowex 50W-X8(H type again, water) purify, with in the sodium hydroxide solution and behind the elutriant, use Sephadex HP-20(water-30% aqueous methanol again) purify, obtain 1-[(1R, 2R, 3S)-2, two (methylol) tetramethylene of 3--1-yl]-5-methyl-2,4-(1H, 3H,-pyrimidine dione (compound 29) (127mg, 67%).

NMR（200MHzFt，CD ₃OD）δ：

1.90（3H，d，J＝1.1Hz），

1.97-2.18（2H，m），

2.36（1H，m），

2.58（1H，m），

3.57-3.70（4H，m），

4.55（1H，m），

7.63（1H，d，J＝1.1Hz），

UVλ _max（H ₂O）nm：

pH1，273;pH7，273;pH13，271。

Embodiment 24

2-amino-9-[(1R, 2R, 3S)-2,3-is two-(methylol) tetramethylene-1-yl]-preparation of 6-chloropurine (compound 17)

Step 1:

2-amino-9-[(1R, 2R, 3S)-2,3-is two-(acetoxy-methyl) tetramethylene-1-yl]-preparation of 6-chloropurine

Pyridine (0.5ml) and acetic anhydride (1ml) are added to 9-[(1R in anhydrous dimethyl formamide (1.5ml), 2R, 3S)-2,3-pair-(methylol) tetramethylene-1-yl]-guanine (compound 11) (265mg, 1.0mmol) in the suspension, stirred the mixture 30 minutes in 75 ℃.After removing solvent under reduced pressure, by remove residual amount solvent, dried residue then for several times with the toluene component distillation.Obtain 9-[(1R thus, 2R, 3S)-2,3-pair-(acetoxy-methyl) tetramethylene-1-yl]-guanine crude product (350mg).

With the 9-[(1R that obtains thus, 2R, 3S)-2,3-pair-(acetoxy-methyl) tetramethylene-1-yl]-guanine crude product (350mg) and etamon chloride (331mg, 2.0mmol) be dissolved in together in the anhydrous acetonitrile (2ml), add N then, accelerine (130ml, 1.0mmol) and phosphoryl chloride (0.57ml, 6.0mmol).In 100 ℃ of reflux mixtures 10 minutes.

From reaction mixture, steam under reducing pressure and remove volatile matter, add trash ice and methylene dichloride, in 0 ℃ of stirring for a moment, neutralize with saturated aqueous solution of sodium bicarbonate then to residue.Under 0 ℃, stir the mixture a moment, use dichloromethane extraction then.With anhydrous sodium sulfate drying dichloromethane extraction liquid, steaming desolventizes then.With silica gel column chromatography (methylene dichloride: ethyl acetate=1: 1, V/V) purification residue obtains 2-amino-9-[(1R, 2R, 3S)-2,3-is two-(acetoxy-methyl) tetramethylene-1-yl]-6-chloropurine (335mg, 91%).

NMR（200MHzFT，CDCl ₃）δ：

2.02（3H，s），

2.11（3H，s），

2.18-2.73（3H，m），

3.09（1H，m），

4.25（4H，d，J＝5.9Hz），

4.59(1H, tangible q, J=84Hz),

4.65（2H，br），

7.88（1H，s）。

Step 2:

With 2-amino-9-[(1R, 2R, 3S)-2,3-pair-(acetoxy-methyl) tetramethylene-1-yl]-6-chloropurine (98mg, 0.27mmol) be dissolved in methyl alcohol (2ml), with salt of wormwood (90mg, 0.65mmol) mixed 0 ℃ of following stirring 30 minutes that are incorporated in, with 1N hydrochloric acid neutralization reaction mixture, use Sephadex HP-20(water-60% aqueous methanol then) purify, obtain 2-amino-9-[(1R, 2R, 3S)-2,3-pair-(methylol) tetramethylene-1-yl]-6-chloropurine (compound 17) (65mg, 86%).

NMR（200MHzFT，CD ₃OD）δ：

2.20（1H，m），

2.37（1H，m），

2.57（1H，m），

2.89（1H，m），

3.69（4H，d，J＝5.5Hz），

4.64(1H, tangible q, J=8.8Hz),

8.19（1H，s）。

UVλ _max（H ₂O）nm：

pH1，244（sh），313;pH7，248（sh），3.6;

pH13，248（sh），305。

Embodiment 25

2-amino-9-[(1R, 2R, 3S)-2,3-is two-(methylol) tetramethylene-1-yl]-preparation of purine (compound 14)

Step 1:

2-amino-9-[(1R, 2R, 3S)-2,3-is two-(acetoxy-methyl) tetramethylene-1-yl]-preparation of purine

With 2-amino-9-[(1R, 2R, 3S)-2,3-pair-(acetoxy-methyl) tetramethylene-1-yl]-(87mg 0.24mmol) is dissolved in methyl alcohol (2ml) to 6-chloropurine.After adding 10% palladium-carbon (13mg), under nitrogen atmosphere, stir all night in room temperature.Add small amount of carbon potassium hydrogen phthalate saturated aqueous solution to reaction mixture, the elimination catalyzer removes solvent then under reduced pressure.With silica gel column chromatography (methylene dichloride: methyl alcohol=20: 1, V/V) purification residue obtains 2-amino-9-[(1R, 2R, 3S)-2,3-is two-(acetoxy-methyl) tetramethylene-1-yl]-purine (56mg, 71%).

NMR（200MHzFT，CDCl ₃）δ：

2.01（3H，s），

2.12（3H，s），

2.28-2.71（3H，m），

3.11（1H，m），

4.17-4.34（4H，m），

4.60(1H, tangible q, J=8.6Hz),

5.11（2H，brs），

7.80（1H，s），

8.70（1H，s）。

Step 2:

With 2-amino-9-[(1R, 2R, 3S)-2,3-pair-(acetoxy-methyl) tetramethylene-1-yl]-(40mg 0.12mmol) is dissolved in methyl alcohol (2ml) to chloropurine, with salt of wormwood (40mg, 0.29mmol) mixed 0 ℃ of stirring 30 minutes that are incorporated in.Behind 0.1N hydrochloric acid neutralization reaction mixture, with Sephadex HP-20(water-50% aqueous methanol) purify, obtain 2-amino-9-[(1R, 2R, 3S)-2,3-pair-(methylol) tetramethylene-1-yl]-purine (compound 14) (27mg, 90%).

NMR（200MHzFT，CD ₃OD）δ：

2.10-2.66（3H，m），

2.90（1H，m），

3.70（4H，d，J＝5.6hz），

4.65(1H, tangible q, J=8.7Hz),

8.20（1H，s），

8.54（1H，s），

UVλ _max（H ₂O）nm：

pH1，252（sh），312;pH7，244（sh），304;

pH13，244（sh），304。

Embodiment 26

2,6-diamino-9-[(1R, 2R, 3S)-2,3-is two-(methylol) tetramethylene-1-yl]-preparation of purine (compound 20)

With 2-amino-9-[(1R, 2R, 3S)-2,3-is two-(acetoxy-methyl) tetramethylene-1-yl]-(87mg 0.24mmol) is dissolved in methyl alcohol (2ml) and be cooled to-78 ℃ to chloropurine, and the solution that obtains thus is saturated with liquid ammonia, be sealed in the ampoule, in 100 ℃ of heating 12 hours.After decompression is steamed from reaction mixture down and is removed volatile matter, it is soluble in water, with 0.1N sodium hydroxide solution neutralization and with Sephadex HP-20(water-40% aqueous methanol) purification, obtain 2,6-diamino-9-[(1R, 2R, 3S)-2,3-pair-(methylol) tetramethylene-1-yl]-purine (compound 20) (41mg, 82%).

NMR（200MHzFT，CD ₃OD）δ：

2.19（1H，m），

2.31（1H，m），

2.54（1H，m），

2.75（1H，m），

3.61-3.74（4H，m），

4.49(1H, tangible q, J=8.6Hz),

7.90（1H，s）。

UVλ _max（H ₂O）nm：

pH1，253，291;pH7，255，280;

pH13，255，280。

Embodiment 27

9-[(1R, 2R, 3S)-2,3-is two-(methylol) tetramethylene-1-yl]-preparation of xanthoglobulin (compound 23)

With 9-[(1R, 2R, 3S)-2,3-pair-(methylol) tetramethylene-1-yl]-VITAMIN B4 (compound 8) (25mg, 0.10mmol) water-soluble (2.5ml), with SODIUMNITRATE (138mg 2.0mmol) mixes and is cooled to 0 ℃, add acetate (0.13ml) after, at room temperature stirred the mixture 1 day, with 1N sodium hydroxide solution neutralization reaction mixture, use Sephadex HP-20(water-40% aqueous methanol then) purify, obtain 9-[(1R, 2R, 3S)-2,3-pair-(methylol) tetramethylene-1-yl]-xanthoglobulin (compound 23) (23mg, 90%).

NMR（200MHzFT，CD ₃OD）δ：

2.25（1H，m），

2.38（1H，m），

2.58（1H，m），

2.90（1H，m），

3.66-3.74（4H，m），

4.76(1H, tangible q, J=8.5Hz),

8.04（1H，s），

8.20（1H，s）。

UVλ _max（H ₂O）nm：

pH1，250;pH7，250;pH13，254。

Table 1

No R ¹R ²R ³A Y Z

13 Me COOMe H CH ₂CH ₂O O

14 Me COOBn H CH ₂CH ₂O O

15 Me H H CH ₂CH ₂O O

16 Me COOMe H CH ₂CH ₂S S

17 Me H OBn CH ₂CH ₂O O

Table 2

Condition productive rate (%)

Reagent solvent temperature ℃ XI a XI b

LiAl（OtBu） ₃H THF -78-RT 9 88

NaBH ₄THF-H ₂O RT 19 80

Li（sBu） ₃BH THF -78 75 23

（iBu） ₂AlH CH ₂Cl ₂-78 74 22

（iBu） ₂AlH toluene-78 82 17

R ⁴＝t-BuPh ₂Si(is in X a, XI a and XI b)

Table 3

Compound I C₅₀（μg/ml）

Numbering HSV-1 HSV-2 HIV HCMV HBV HeLaS₃P388 L1210

8 7.3 8.9 0.03 12 0.024 14 0.58 1.1

11 0.03 0.13 0.3 0.4 0.86 19 1.6 8.1

Table 4

Survival number/sum when compound administration approach dosage is on average survived

Between (mg/kg/ days) (my god)

Control group 7.7 0/10

20 20.0 10/10

10 20.0 10/10

i.p. 5 20.0 10/10

2.5 18.9 9/10

1.25 19.8 7/10

No.11

20 19.7 9/10

10 19.8 9/10

p.o. 5 18.9 8/10

2.5 14.7 4/10

1.25 12.4 2/10

100 5.4 2/10

50 16.1 5/10

i.p. 25 12.7 1/10

ACN 12.5 11.1 1/10

100 14.3 2/10

50 14.8 4/10

p.o.

25 11.1 0/10

12.5 9.3 0/10

Numbering solvent catalyst time productive rate optical purity^c）

(equivalent) (h) (%) (%ee)

1 TMB ^d）1.0 0.5 89 93.2

2 TMB 0.1 0.5 99 94.0

3 T-PE ^e）1.0 3 78 98.3

4 T-PE 0.1 3 95 97.7

5 Et ₂O 1.0 18 45 -

Claims

1, the method for the compound of the following logical formula IV representative of preparation:

(wherein B represents pyrimidine bases or purine bases, R ⁴Represent hydrogen atom), this method comprises the compound that makes following general formula (V) representative:

(R wherein ⁴Represent hydrogen atom or blocking group, X represents leavings group) react in solvent with pyrimidine base or purine bases, have blocking group as the compound that obtains thus, then remove this blocking group.

2, according to the process of claim 1 wherein R ⁴Blocking group is ester type blocking group or ether type blocking group.

3, according to the method for claim 2; wherein said ester type blocking group is ethanoyl, benzoyl, formyl-dimethylamino or diphenyl amino formyl radical, and described ether type blocking group is t-butyldimethylsilyl, t-butyldiphenylsilyl, methoxymethyl or benzyl.

4, according to the process of claim 1 wherein that described leavings group is sulfonyloxy or halogen atom.

5, according to the method for claim 1; wherein said pyrimidine base is uridylic, thymus pyrimidine or cytosine(Cyt) (these compounds can have blocking group); described purine bases is VITAMIN B4, xanthoglobulin, guanine, 2-amino-6-chloropurine, 2-aminopurine or 2,6-diaminopurine (these compounds can have blocking group).

6,, carry out to the temperature of the reflux temperature of solvent in 0 ℃ according to the process of claim 1 wherein that described reaction is in solvent.