ES419810A1 - A PROCEDURE FOR THE PREPARATION OF 9-ACIL-11, 12-SECO-PROS- TAGLANDINAS. - Google Patents
A PROCEDURE FOR THE PREPARATION OF 9-ACIL-11, 12-SECO-PROS- TAGLANDINAS.Info
- Publication number
- ES419810A1 ES419810A1 ES419810A ES419810A ES419810A1 ES 419810 A1 ES419810 A1 ES 419810A1 ES 419810 A ES419810 A ES 419810A ES 419810 A ES419810 A ES 419810A ES 419810 A1 ES419810 A1 ES 419810A1
- Authority
- ES
- Spain
- Prior art keywords
- formula
- ethylene
- lower alkyl
- dimethylethylene
- trimethylene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D303/00—Compounds containing three-membered rings having one oxygen atom as the only ring hetero atom
- C07D303/02—Compounds containing oxirane rings
- C07D303/38—Compounds containing oxirane rings with hydrocarbon radicals, substituted by carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C243/00—Compounds containing chains of nitrogen atoms singly-bound to each other, e.g. hydrazines, triazanes
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C245/00—Compounds containing chains of at least two nitrogen atoms with at least one nitrogen-to-nitrogen multiple bond
- C07C245/12—Diazo compounds, i.e. compounds having the free valencies of >N2 groups attached to the same carbon atom
- C07C245/14—Diazo compounds, i.e. compounds having the free valencies of >N2 groups attached to the same carbon atom having diazo groups bound to acyclic carbon atoms of a carbon skeleton
- C07C245/18—Diazo compounds, i.e. compounds having the free valencies of >N2 groups attached to the same carbon atom having diazo groups bound to acyclic carbon atoms of a carbon skeleton the carbon skeleton being further substituted by carboxyl groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C403/00—Derivatives of cyclohexane or of a cyclohexene or of cyclohexadiene, having a side-chain containing an acyclic unsaturated part of at least four carbon atoms, this part being directly attached to the cyclohexane or cyclohexene or cyclohexadiene rings, e.g. vitamin A, beta-carotene, beta-ionone
- C07C403/20—Derivatives of cyclohexane or of a cyclohexene or of cyclohexadiene, having a side-chain containing an acyclic unsaturated part of at least four carbon atoms, this part being directly attached to the cyclohexane or cyclohexene or cyclohexadiene rings, e.g. vitamin A, beta-carotene, beta-ionone having side-chains substituted by carboxyl groups or halides, anhydrides, or (thio)esters thereof
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C43/00—Ethers; Compounds having groups, groups or groups
- C07C43/02—Ethers
- C07C43/03—Ethers having all ether-oxygen atoms bound to acyclic carbon atoms
- C07C43/04—Saturated ethers
- C07C43/12—Saturated ethers containing halogen
- C07C43/123—Saturated ethers containing halogen both carbon chains are substituted by halogen atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C43/00—Ethers; Compounds having groups, groups or groups
- C07C43/02—Ethers
- C07C43/03—Ethers having all ether-oxygen atoms bound to acyclic carbon atoms
- C07C43/14—Unsaturated ethers
- C07C43/17—Unsaturated ethers containing halogen
- C07C43/174—Unsaturated ethers containing halogen containing six-membered aromatic rings
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
- C07C49/04—Saturated compounds containing keto groups bound to acyclic carbon atoms
- C07C49/16—Saturated compounds containing keto groups bound to acyclic carbon atoms containing halogen
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C49/00—Ketones; Ketenes; Dimeric ketenes; Ketonic chelates
- C07C49/20—Unsaturated compounds containing keto groups bound to acyclic carbon atoms
- C07C49/227—Unsaturated compounds containing keto groups bound to acyclic carbon atoms containing halogen
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C53/00—Saturated compounds having only one carboxyl group bound to an acyclic carbon atom or hydrogen
- C07C53/15—Saturated compounds having only one carboxyl group bound to an acyclic carbon atom or hydrogen containing halogen
- C07C53/19—Acids containing three or more carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C59/00—Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
- C07C59/01—Saturated compounds having only one carboxyl group and containing hydroxy or O-metal groups
- C07C59/10—Polyhydroxy carboxylic acids
- C07C59/105—Polyhydroxy carboxylic acids having five or more carbon atoms, e.g. aldonic acids
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C59/00—Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
- C07C59/147—Saturated compounds having only one carboxyl group and containing —CHO groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C59/00—Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
- C07C59/185—Saturated compounds having only one carboxyl group and containing keto groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C59/00—Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
- C07C59/185—Saturated compounds having only one carboxyl group and containing keto groups
- C07C59/215—Saturated compounds having only one carboxyl group and containing keto groups containing singly bound oxygen containing groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C59/00—Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
- C07C59/185—Saturated compounds having only one carboxyl group and containing keto groups
- C07C59/225—Saturated compounds having only one carboxyl group and containing keto groups containing —CHO groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C59/00—Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
- C07C59/235—Saturated compounds containing more than one carboxyl group
- C07C59/347—Saturated compounds containing more than one carboxyl group containing keto groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C59/00—Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
- C07C59/40—Unsaturated compounds
- C07C59/58—Unsaturated compounds containing ether groups, groups, groups, or groups
- C07C59/64—Unsaturated compounds containing ether groups, groups, groups, or groups containing six-membered aromatic rings
- C07C59/66—Unsaturated compounds containing ether groups, groups, groups, or groups containing six-membered aromatic rings the non-carboxylic part of the ether containing six-membered aromatic rings
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C59/00—Compounds having carboxyl groups bound to acyclic carbon atoms and containing any of the groups OH, O—metal, —CHO, keto, ether, groups, groups, or groups
- C07C59/40—Unsaturated compounds
- C07C59/76—Unsaturated compounds containing keto groups
- C07C59/90—Unsaturated compounds containing keto groups containing singly bound oxygen-containing groups
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C67/00—Preparation of carboxylic acid esters
- C07C67/30—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group
- C07C67/333—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by isomerisation; by change of size of the carbon skeleton
- C07C67/343—Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by isomerisation; by change of size of the carbon skeleton by increase in the number of carbon atoms
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/02—Esters of acyclic saturated monocarboxylic acids having the carboxyl group bound to an acyclic carbon atom or to hydrogen
- C07C69/04—Formic acid esters
- C07C69/08—Formic acid esters of dihydroxylic compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/02—Esters of acyclic saturated monocarboxylic acids having the carboxyl group bound to an acyclic carbon atom or to hydrogen
- C07C69/12—Acetic acid esters
- C07C69/16—Acetic acid esters of dihydroxylic compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/02—Esters of acyclic saturated monocarboxylic acids having the carboxyl group bound to an acyclic carbon atom or to hydrogen
- C07C69/22—Esters of acyclic saturated monocarboxylic acids having the carboxyl group bound to an acyclic carbon atom or to hydrogen having three or more carbon atoms in the acid moiety
- C07C69/28—Esters of acyclic saturated monocarboxylic acids having the carboxyl group bound to an acyclic carbon atom or to hydrogen having three or more carbon atoms in the acid moiety esterified with dihydroxylic compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/52—Esters of acyclic unsaturated carboxylic acids having the esterified carboxyl group bound to an acyclic carbon atom
- C07C69/533—Monocarboxylic acid esters having only one carbon-to-carbon double bond
- C07C69/54—Acrylic acid esters; Methacrylic acid esters
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/62—Halogen-containing esters
- C07C69/63—Halogen-containing esters of saturated acids
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C69/00—Esters of carboxylic acids; Esters of carbonic or haloformic acids
- C07C69/66—Esters of carboxylic acids having esterified carboxylic groups bound to acyclic carbon atoms and having any of the groups OH, O—metal, —CHO, keto, ether, acyloxy, groups, groups, or in the acid moiety
- C07C69/67—Esters of carboxylic acids having esterified carboxylic groups bound to acyclic carbon atoms and having any of the groups OH, O—metal, —CHO, keto, ether, acyloxy, groups, groups, or in the acid moiety of saturated acids
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F9/00—Compounds containing elements of Groups 5 or 15 of the Periodic Table
- C07F9/02—Phosphorus compounds
- C07F9/28—Phosphorus compounds with one or more P—C bonds
- C07F9/54—Quaternary phosphonium compounds
- C07F9/5407—Acyclic saturated phosphonium compounds
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
- C07B2200/00—Indexing scheme relating to specific properties of organic compounds
- C07B2200/07—Optical isomers
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
- C07C2601/14—The ring being saturated
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/18—Systems containing only non-condensed rings with a ring being at least seven-membered
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
A method of preparing 9-acyl-11,12-secoprostaglandins of the formula: **(See formula)** where A is ethylene, trimethylene, α-methylethylene, β-methylethylene, α, α-dimethylethylene, β, β-dimethylethylene or oxymethylene; Z is methylene, ethylene, trimethylene, tetramethylene, vinyl, or ethylene; R2 and R4 are independently selected from the group consisting of hydrogen and methyl; R5 is selected from the group consisting of hydrogen, linear or branched lower alkyl of 1 to 4 carbon atoms (eg methyl, ethyl, propyl, isopropyl, butyl, tert-butyl), vinyl and 2,2,2-trifluoroethyl; in addition, when R5 is lower alkyl and R2 is methyl, they can be bonded together (with hydrogen abstraction) to form a 6- to 9-membered carbocyclic ring; likewise, when R5 is lower alkyl and R2 is hydrogen, R5 may be attached to the carbon atom bearing the R2 and OR3 groups to form a 5- to 8-membered carbocyclic ring; whose procedure is to react a compound of formula: **(See formula)** where R10 is lower alkyl of 1 to 5 carbon atoms, with one equivalent of a strong base and then with one of compounds A or B, then react the resulting product with one equivalent of a strong base followed by reaction with the another of compounds A or B, where compound A responds to the formula **(See formula)** where X is halogen; A is ethylene, trimethylene, α-methylene, β-methylene, α, α-dimethylethylene, β, β-dimethylethylene or oxymethylene; and R10 is lower alkyl of 1 to 5 carbon atoms; and where compound B responds to the formula: **(See formula)** where X is halogen, preferably chlorine or bromine; Z'is methylene, ethylene, trimethylene or tetramethylene and R4 and R5 are as defined above; recovering the intermediate product thus produced and then subjecting the product to basic hydrolysis, decarboxylation and elimination when R10 is tert-butyl or subjecting the product to basic hydrolysis and decarboxylation when R10 is primary or secondary alkyl to form the product **(See formula)** where A, R4, R5 and Z'are as defined above. (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US30236572A | 1972-10-30 | 1972-10-30 | |
| US38990173A | 1973-08-23 | 1973-08-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES419810A1 true ES419810A1 (en) | 1977-01-01 |
Family
ID=26972898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES419810A Expired ES419810A1 (en) | 1972-10-30 | 1973-10-19 | A PROCEDURE FOR THE PREPARATION OF 9-ACIL-11, 12-SECO-PROS- TAGLANDINAS. |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS49100032A (en) |
| AU (1) | AU472337B2 (en) |
| CA (1) | CA1014169A (en) |
| CH (1) | CH605553A5 (en) |
| ES (1) | ES419810A1 (en) |
| FR (1) | FR2204423B1 (en) |
| GB (1) | GB1431100A (en) |
| IE (1) | IE38390B1 (en) |
| IL (1) | IL43436A (en) |
| NL (1) | NL7314109A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5686129A (en) * | 1979-12-18 | 1981-07-13 | Teijin Ltd | Secoprostaglandin and its preparation |
| JPS5726640A (en) * | 1980-07-24 | 1982-02-12 | Teijin Ltd | Novel secoprostaglandin and its preparation |
-
1973
- 1973-10-12 NL NL7314109A patent/NL7314109A/xx not_active Application Discontinuation
- 1973-10-17 IL IL43436A patent/IL43436A/en unknown
- 1973-10-17 CA CA183,654A patent/CA1014169A/en not_active Expired
- 1973-10-18 AU AU61572/73A patent/AU472337B2/en not_active Expired
- 1973-10-18 IE IE1863/73A patent/IE38390B1/en unknown
- 1973-10-19 ES ES419810A patent/ES419810A1/en not_active Expired
- 1973-10-22 GB GB4904073A patent/GB1431100A/en not_active Expired
- 1973-10-25 CH CH1507973A patent/CH605553A5/xx not_active IP Right Cessation
- 1973-10-29 FR FR7338457A patent/FR2204423B1/fr not_active Expired
- 1973-10-30 JP JP48122146A patent/JPS49100032A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JPS49100032A (en) | 1974-09-20 |
| NL7314109A (en) | 1974-05-02 |
| CA1014169A (en) | 1977-07-19 |
| IE38390L (en) | 1974-04-30 |
| FR2204423A1 (en) | 1974-05-24 |
| AU472337B2 (en) | 1976-05-20 |
| IL43436A0 (en) | 1974-01-14 |
| GB1431100A (en) | 1976-04-07 |
| IL43436A (en) | 1978-12-17 |
| AU6157273A (en) | 1975-04-24 |
| FR2204423B1 (en) | 1977-07-08 |
| IE38390B1 (en) | 1978-03-01 |
| DE2354085B2 (en) | 1977-04-07 |
| DE2354085A1 (en) | 1974-05-16 |
| CH605553A5 (en) | 1978-09-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| IE41503L (en) | Pipeazinyl-benzimidazoles | |
| ES401710A1 (en) | Bicyclic nitrogenous compounds and salts | |
| SE8105173L (en) | PROCEDURE FOR PREPARING ETHYLENE LYCOL | |
| ES419810A1 (en) | A PROCEDURE FOR THE PREPARATION OF 9-ACIL-11, 12-SECO-PROS- TAGLANDINAS. | |
| ATE27817T1 (en) | PHENYLPIPERAZINE DERIVATIVES AND PROCESS FOR THEIR MANUFACTURE. | |
| ES425591A1 (en) | A PROCEDURE FOR THE PREPARATION OF SECOPROSTAGLANDIAN. | |
| ES435955A1 (en) | A procedure for obtaining a pirid derivative (3,4-d) pyridezine. (Machine-translation by Google Translate, not legally binding) | |
| ES400841A1 (en) | 2-hydroxybenzophenones | |
| ES443421A1 (en) | 11-deoxy-15-substituted-16,17,18,19,20-pentanorprostaglandins | |
| ES453121A1 (en) | A METHOD FOR THE PREPARATION OF NEW DERIVATIVES OF PIRIDYL UREAS. | |
| GB1209982A (en) | Process for the production of perfluoroalkyl iodo ethanes and ethylenes | |
| ATE1008T1 (en) | ISOMERIZATION OF 3-AZABI CYCLO(3.1.0)HEXANE DERIVATIVES. | |
| ES465346A1 (en) | 2h-imidazole-2-thione derivatives | |
| ES386567A1 (en) | PROCEDURE FOR OBTAINING PIRIDAZONE DERIVATIVES. | |
| ES425405A1 (en) | Procedure for preparing new derivatives of dibenzo (a, d) ciclohepteno. (Machine-translation by Google Translate, not legally binding) | |
| ES437041A1 (en) | A procedure for preparing 1-ftalazone derivatives. (Machine-translation by Google Translate, not legally binding) | |
| ES402471A1 (en) | A PROCEDURE FOR THE PREPARATION OF DERIVATIVES OF 1-ARI-LOXI-3-AMINO-PROPANOL. | |
| ES364724A1 (en) | Procedure for the preparation of new derivatives of paminoalquil-bencensulfonamida. (Machine-translation by Google Translate, not legally binding) | |
| ES434922A1 (en) | 2-halo-indan-1,3-diones and their use in preparing 2-nitro-indan-1,3 diones | |
| ES437408A1 (en) | A procedure for the preparation of new derivatives of indan 1, 3-diona. (Machine-translation by Google Translate, not legally binding) | |
| GR23455B (en) | METHOD FOR THE PREPARATION OF BENZOKINOLIZINE TEXTILE CARBINES. | |
| ES439051A1 (en) | Procedure for the obtaining of new derivatives of diazepine. (Machine-translation by Google Translate, not legally binding) | |
| ES437407A1 (en) | Preparation of 2-nitroindan-1,3-diones | |
| ES423846A1 (en) | Procedure for preparing derivatives of dibenzo (a, d) ciclohepteno. (Machine-translation by Google Translate, not legally binding) | |
| ES425357A1 (en) | A method of preparation of cefem derivatives. (Machine-translation by Google Translate, not legally binding) |