AU617386B2 - Substituted quinolines - Google Patents

Description

OPI DATE 05/07/89 APPLN. ID 26118 88 PAC S E 27/07/89 PCT NUMBER PCT/DK88/00188 INTERNATIO AP I TIO UB SHE UNDER THE PATENT COOPERATION TREATY (PCT) (51) International Patent Classification 4 (11) International Publication Number: WO 89/ 05294 C07D 215/12, 215/14, 215/18 C07D 215/20, 215/22, 215/24 Al C07D 215/26, 215/32, 215/38 (43) International Publication Date: 15 June 1989 (15.06.89) C07D 215/40, 215/42, 401 12 (21) International Application Number: PCT/DK88/00188 DK-3500 Vaerlse (DK).

(22) International Filing Date: 17 November 1988 (17.11.88) (74) Agent: RYDAHL KRISTENSEN, Leo Pharmaceutical Products, Industriparken 55, DK-2750 Ballerup (DK).

(31) Priority Application Number: 8728051 (32) Priority Date: 1 December 1987 (01.12.87) (81) Designated States: AT (European patent), AU, BE (European patent), CH (European patent), DE (Euro- (33) Priority Country: GB pean patent), DK, FR (European patent), GB (European patent), IT (European patent), JP, KR, LU (European patent), NL (European patent), SE (European (71) Applicant (for all designated States except US): LEO patent), US.

PHARMACEUTICAL PRODUCTS LTD. A/S (LOVENS KEMISKE FABRIK PRODUKTION- SAKTIESELSKAB) [DK/DK]; Industriparken 55, Published DK-2750 Ballerup With international search report.

(72) Inventors; and Inventors/Applicants (for US only) AHNFELT- RONNE, Ian [DK/DK]; Langerodvej 33, DK-3480 Fredensborg HANSEN, Erik, TorngArd [DK/ DK]; Asmundshoj 457, DK-3480 Fredensborg (DK).

KIRSTEIN, Dorte [DK/DK]; Lehwaldsvej 3, 6F, DK- 2800 Lyngby DK). NIELSEN, Ole, Bent, Tvarmose [DK/DK]; Risagervej 4, DK-2720 Vanlose (DK).

RACHLIN, Schneur [DK/DK]; Sondersovej 17, (54) Title: SUBSTITUTED QUINOLINES

R

1

CH

2

-N--(CH

2

X-Q-A

(I)

(57) Abstract The present invention relates to hitherto unknown compounds of formula in which formula R 1 stands for hydrogen, straight or branched, saturated or unsaturated, unsubstituted or substituted Ci-Cs-alkyl, aryl or for ar-Ci-C 4 -alkyl, aryl or ar being unsubstittited or substituted phenyl, R, R R 4

R

5

R

6 and R 7 are the same or different and stand for hydrogen, halogen, pseudo halogen, cyano, nitro, amino, carboxy, carbalkoxy, carbamyl, hydroxy, alkyl, alkoxy; n and m are the same or different and stand for an integer from 0-6; provided that n cannot be zero when A stands for carboxy and X and Q both stand for a bond; X stands for a bond or for 0, S, S(O) 2 or for NRg where R 8 is defined as R 1 above; Q stands for a bond of for straight or branched, Ci-C 6 -alkylene; A stands for an acidic group, e.g. for carboxy, 1H-tetrazolyl, a sulphonic acid group, a sulfamyl group, a sulphinic acid group or a hydroxamic acid group. The present compounds are of value in the human and veterinary practice as lipoxygenase inhibitors and/or leukotriene antagonists.

i1 1 SUBSTITUTED QUINOLINES The present invention relates to hitherto unknown compounds useful in the human and veterinary therapy, to pharmaceutically acceptable salts thereof, to bioreversible derivatives thereof, to methods for producing said new comoounds, to pharmaceutical compositions containing the new compounds, to dosage units of the compositions, and to methods of treating patients using said compositions and dosage units.

It has recently been discovered that leukotrienes, ,.ich are formed via the 5-lipoxygenase pathway of arachidonic acid'metabolism, are implicated in a variety of pathophysiolqgic functions, such as bronchoconstriction, plasma exudation, coronary artery spasm, leukocyte chemotaxis and neutrophil degranulation It is therefore of considerable interest to develop compounds which inhibit 5-lipoxygenases and thereby the production of leukotrienes, or antagonize the effects of leukotrienes.

German patent application DE 3607 382 (corresponding to United Kingdom patent application No. 8604183) describes a series of pyridylmethoxy or -methyl-thio substituted N-substituted aniline derivatives with activities as lipoxygenase.inhibitors and/or leukotriene antagonists. The N-substituent in these compounds may be substituted or unsubstituted aryl or aralkyl.

EP-A-206751 discloses compounds having the formula: R'

R'

RI X -R 3

R'

R

2 R4 *I i -1-I la 1 In this formula Y inter alia may be CH20, X is O, S, SO,

SO

2 or NR 2 and R 3 inter alia may be a saturated or unsaturated aliphatic group which may be substituted by a carboxyl group. These compouns are described to antagonize the effects of the leucotrienes and to inhibit the leucotrienes. Thus, these compounds are valuable in the prevention and treatment of disease states in which the leucotrienes are the causative factor.

EP-A-190 722 discloses compounds of the formula:

R

3 ,A I Z in which X is inter alia CH20, Z is an alkylene chain containing up to 10 carbon atoms in the principal chain which may be attached to the phenyl group through an oxygen atom and R may be OR 6 wherein R 6 is H, lower alkyl S or phenyl. These compounds are lipoxygenase inhibitors possessing anti-inflammatory and anti-allergic activities.

EP-A-232 954 discloses compounds of the general formula: R2 xYN S0 2

R

3 in which inter alia X may be an nitrogen atom and W a carbon atom, Y may be CH 2 0, R 2 is hydrogen oder lower alkyl and R 3 is lower alkyl, perfluoro lower alkyl or perfluorophenyl.

A_ i-i lb 1 These compounds are useful in the treatment of leukotrienemediated naso-bronchial obstructive air passage way conditions, such as allergic rhinitis, allergic bronchial asthma and the like, and anti-thrombotic therapy.

EP-A-233 763 discloses compounds of the formula: n0 p L~ R 4 in which inter alia Y is CH20, and X 2 and X 3 are independently 0, S, SO or S02 and R 6 is H or C 1 bis C 4 alkyl.

The residues attached to X 2 and X 3 may be saturated or unsaturated aliphatic groups which may be inter alia substituted by a carboxyl group. These compounds are leukotriene antagonists or inhibitors and are useful for treatment of disease states in which the leukotrienes are the causative factor.

EP-A-271 287 has a similar disclosure.

Now it has surprisingly turned out that introduction of one of a number of acidic groups into such N-substituents results in compounds with an even more pronounced effect.

Furthermore, it has been found that in the presence of such acidic groups also compounds which are not anilines, but in which the nitrogen atom has been separated from the phenyl group with a carbon chain are potent compounds.

P.J. Piper and M.N. Samhoun, Br.Med.Bull. 43 (1987) 297.

2 1 Moreover, these compounds are more specific agents, as their leukotriene antagonistic activity is much more pronounced than their activity as lipoxygenase inhibitors.

Also, the present compounds are well absorbed after enteral administration.

The present compounds have the formula I R R3 R R5 R R 7 2 3 4 5 X-Q-A S N(CH 2 )n-N-(CH 2

M

N CH20 2 in which formula I R 1 stands for hydrogen, straight or branched, saturated or unsaturated, unsubstituted or substituted C -C -alkyl, aryl or for ar-C1-C4-alkyl, aryl or ar being unsubstituted or substituted phenyl, the above substitution being one or more of the following substituents: halogen, pseudo halogen, such as trifluoro methyl, cyano, nitro, amino, carboxy, carbalkoxy, carbamyl, hydroxy, alkyl, alkoxy; R 2

R

3

R

4

R

5

R

6 and R 7 are the same or different and stand for hydrogen, halogen, pseudo halogen, cyano, nitro, amino, carboxy, carbalkoxy, carbamyl, hydroxy, alkyl, alkoxy; n and m are the same or different and stand for an integer from 0-6; provided that n cannot be zero when A stands for carboxy and X and Q both stand for a bond; X stands for a bond or for 0, S, S(O) 2 or for NR 8 where

R

8 is defined as R 1 above; Q stands for a bond or for straight or branched, C -C -alkylene; A stands for an acidic se\ecad ro 1 6 group, ke-g-- for carboxy, 1H-tetrazolyl, a sulphonic acid group, a sulfamyl group, a sulphinic acid group or a hydroxamic acid group.

Among the preferred compounds of the invention are those of formula I, in which -X-Q-A stands for a carboxy- C -C 6 -alkoxy or a 1H-tetrazolyl group.

substituted amino 2. T j 2a Especially preferred compounds are: 3-(2'-quinolylmethoxy)-N-(3"-carboxymethoxybenzyl)aniline; 3- -quinoly2.methoxy 2" -carboxymethoxybenzyl )aniline; 3-(2'-quinolylmethoxy)-N-(4"-carboxymrethoxybenzyl)aniline; 3-(2'-quinolylmethoxy)-N-(4"-(l-carboxyethoxy)benzyl)aniline; 3-(2'-quinolylmethoxy)-N-(2"-carboxy-(3-propyloxy)benzyl)aniline; 3-(2'-quiniolylmethoxy)-N-(4"-(lH--tetrazc~lyl)benzyl)aniline; 2' -quinolylmethoxy)-N-(3"-( iX-tetrazolyl )benzyl )aniline 2' -quinolylmethoxy 11-tetrazolyl )(3-propyloxy is benzyl)aniline; 3-(2'-quinolylmethoxy)-N-(3"-fluorobenzyl)-N-(4' ''-hydroxaminocarbonyl:benzyl )aniline.

The present salts of the compounds of formula I may be formed with pharmaceutically acceptable inorganic or organic acids, such as hydrochloric, hydrobromic and hydroiodic acid, phosphoric acid, sulphuric acid, nitric acid, p-toluenesulphonic acid, methanesulphonic acid, formic acid, acetic acid, propionic acid, citric acid, tartaric acid, and maleic

A

i II -T~C WO 89/05294 PCT/DK88/00188 3 limiting for the invention.

The present salts of the compounds of formula I may also be formed with pharmaceutically acceptable, inorganic or organic bases. As examples of salts formed with pharmaceutically acceptable, non-toxic bases, mention may be made of alkali metal salts and alkaline earth metal salts, such as lithium, sodium, potassium, magnesium, calcium salts, as well as salts with ammonia and suitable non-toxic amines, such as C 1

-C

6 -alkylamines, e.g. triethylamine, C-C 6 alkanolamines, e.g. diethanolamine or triethanolamine, procaine, cycloalkylamines, e.g. dicyclohexylamine, benzylamines, e.g. N-methylbenzylamine, N-ethylbenzylamine, N-benzyl-p-phenethylamine, N,N'-dibenzylethylenediamine or dibenzylamine, and heterocyclic amines, e.g. morpholine, N-ethylpiperidine and the like.

Even if the present compounds are well absorbed after enteral administration, in some cases it can be advantageous to prepare suitable bioreversible derivatives of compounds of the invention, i.e. to prepare so-called prodrugs, preferably derivatives, the physiochemical properties of which leads to improved solubility at physiological pH and/or absorption of the compound in question.

Such derivatives are for instance esters of Nhydroxymethyl derivatives of compounds of the invention, such compounds being prepared by reaction of a secondary aminefunction of compounds of the invention with formaldehyde followed by reaction with a suitable acidic compound or activated derivatives of such compounds, R.G. Kallen and W.P. Jencks, J. Biol. Chem. 241 (1966) 5864.

C.J. Martin and M.A. Marini, J. Biol. Chem. 242 (1967) 5736.

M. Levy and D.E. Silbcrman, J. Biol. Chem. 118 (1937) 723.

S. Lewin and D.A. Humphany, J. Chem. Soc. B (1966) 210.

SUBSTITUTE i I I i i. i ii WO 89/05294 PCT/DK88/00188 4 for instance with bisulfite N,N-dimethylglycine, N,Ndiethyl-p-alanine, or phosphoric acid but other suitable acids which form bioreversible derivatives with desirable physicochemical properties can be used as well.

Further examples include esters formed with the acidic function in the molecule, such as acyloxyalkyl, alkoxycarbonyloxyalkyl or aminoacyloxyalkyl esters, which are readily hydrolyzed in vivo or in vitro.

Among the above esters the following are preferred: alkanoyloxymethyl with from 3 to 8 carbon atoms, l-alkanoyloxy)ethyl with from 4 to 9 carbon atoms, alkoxycarbonyloxymethyl with from 3 to 6 carbon atoms, l-(alkoxycarbonyloxy)ethyl with from 4 to 7 carbon atoms, and a-aminoalkanoyloxymethyl with from 2 to 6 carbon atoms.

Other preferred esters are lactonyl esters, e.g.

3-phthalidyl, 4-crotonolactonyl or -butyrolactDn-4-yl esters.

Also within the scope of the invention are methoxymethyl, cyanomethyl, or mono- or dialkyl substituted aminoalkyl esters, e, g. 3-dimethylaminoethyl, 2-diethylaminoethyl, or 3-dimethylaminopropyl esters.

In particular, such esters are preferred which are well absorbed upon enteral administration and during or after the absorption are hydrolysed to the compounds of formula I.

These examples are not to be considered as limiting for the invention, and other suitable methods to improve the physicochemical properties and solubility-of the compounds concerned can be used as well.

Metabolites of arachidonic acid include prostaglandins and leukotrienes. Both of these two groups of metabolites are important in the pathophysiology of inflammatory and allergic reactions. Many inhibitors of prostaglandin synthesis are known and are being used as anti-inflammatory B.C. Jain, B.H. Iyer, and P.C. Guha, Science and Culture 11 (1946) 568.

S.A. Varia, S. Schuller, K.B. Sloan and V.J. Stella, J. Pharm. Sci., 73 (1985) 1068 and following papers.

WO 89/05294 PCT/DK88/00188 agents but relatively few leukotriene inhibitors are presently known, and they are generally not clinically acceptable. The first step in the biochemical synthesis of all leukotrienes is the peroxidation at the 5-carbon atom of arachidonic acid. This reaction is catalyzed by the enzyme present mainly in leukocytes. Leukotriene B 4 is one of the most potent chemoattractants for polymorphonuclear leukocytes, and at the same time causes aggregation and degranulation of these inflammatory cells. It is thus a potent pro-inflammatory hormone. Leukotriene C 4

D

4 and E 4 together comprise the agent known previously as "slowreacting substance of anaphylaxis" (SRS-A), which is three orders of magnitude more potent than histamine in causing bronchoconstriction, and also regulates microvascular smooth muscle contractility and permeability. It is therefore a mediator of asthmatic, allergic and inflammatory reactions.

Inhibition of 5-lipoxygenase thus leads to a decrease in the formation of all of these inflammatory and allergic mediators. This has very important clinical implications, as specific 5-lipoxygenase inhibitors and leukotriene antagonists are of potential interest in the therapy of asthma, allergy, rheumatoid arthritis, spondyloarthritis, gout, atherosclerosis, proliferative and inflammatory skindisorders, such as psoriasis and atopic dermatitis, chronic inflammatory bowel disease, and other inflammatory conditions, vasospasm associated with angina pectoris, pulmonary hypertension, cystic fibrosis, the adult respiratory distress syndrome, ischemic and reperfusion injury etc. The identification of specific 5-lipoxygenase inhibitors and leukotriene antagonists is thus a novel approach with very wide implications for the treatment of a diversity of clinical disorders.

The following method was used to assay R.J. Flower, S. Moncada and J.R. Vane, in: The Pharmacological Basis of Therapeutics (1980), eds. A.G.

Gilman, L.S. Goodmann and A. Gilman), (Macmillan, New York) p. 682.

E.J. Goetzl, D.G. Payan and D.W. Goldman, J. Clin.

Immunol. 4 (1984) 79.

__SUBSTIUTE

.i i i WO 89/05294 PCT/DK88/00188 6 activity in vitro: Rat peritoneal cells were harvested by i.p. injection of 10 ml Hank's balanced salt solution (GIBCO, cat. No. 4025, containing 12.5 U/ml sodium heparin (Leo, Denmark) in anaesthesized rats. The resulting cell suspension, which mainly contained macrophages, was transferred to a test tube and washed twice by centrifugation (200 g, 10 min.) and resuspended in Hank's balanced salt solution containing 0.5% bovine serum albumin (BSA) (Sigma Chem. Co., The cells from 9 rats were finally resuspended in Hank's balanced salt solution (with 14 BSA) containing 5pCi 14C]arachidonic acid (The Radiochemical Centre, Amersham, and incubated for minutes at 370C. This caused labelling of cell membrane phospholipids as radioactive arachidonic acid was incorporated in the 2-position of the glycerol moiety.

Excess arachidonic acid was then removed by washing the cells twice as described above. The cells were finally resuspended in the same solution (without BSA) at 107 cells/ml. 475 pl of the cell suspension was preincubated at 370C for 5 minutes with either 5 pl dimethylsulphoxide (DMSO) (control tube), or 5 pl of a drug solution in DMSO.

Then 20pl of a mixture of equal volumes of the calcium -4 ionophore A23187, 10 M in ethanol (Calbiochem, and 0.4 5XM CaCl 2 in water was added. The final concentration of -6 A23187 was thus 2 x 10 M, and of Ca 8mM. After 5 minutes of incubation the tubes were transferred to an ice-bath and centrifuged for 10 minutes at 3,000 g (40C). An aliquot of the supernatant was counted by liquid scintillation spectrometry in order to calculate the total radioactive release induced by A23187 in presence of drugs. A decrease in radioactive release was taken as indication of phospholipase

A

2 inhibition. The supernatant was then extracted with ethyl acetate (2 ml), adjusted to pH 3 with 1 N HC1 and further extracted with 2 ml ethyl acetate. The combined extracts were evaporated to dryness in vacuo, the residue was redissolved in a small volume of methanol and applied by

TM

means of a Desaga Autospotter Tto a silica-gel coated thin-layer plate fitted with a polar concentrating zone (Merck Art. 11798, Darmstadt, The plates were R(IRqTIT(IT i

A

R1.

WO 89/05294 PCT/DK88/00188 developed in the organic layer of the solvent mixture ethyl acetate/acetic acid/iso-octane/water (55:10:25:50). Radioactive spots were detected by autoradiography (AGFA-GEVAERT, Osray-RPI X-ray film, Belgium), and changes induced by drugs in the metabolic pattern of arachidonic acid were quantified

TM

by a laser densitometer (LKB, Ultroscan T2202, Bromma, Sweden) in combination with an integrating computer (SP 4100, Spectra-Physics, San Jose, Ca., These cells produced measurable amounts of radioactive 6-keto-prostaglandin Fl thromboxane B2 prostaglandin D 2 hydroxyheptadecatrienoic acid (HHT) (all cyclooxygenase products), 5-hydroxyeicosatetraenoic acid and leukotriene B 4 (both 5-lipoxygenase products).

When a compound produced according to one of the Examples 2, 8, 9, 11, 12, 13, 14, 16, 20, 21 or 22 at a 66 final concentration of 10 M was added to the reaction mixture described above, a significant and specific decrease in the production of leukotriene B 4 and 5-HETE occurred. At the same time, a decrease in synthesis of the cyclooxygenase products HHT, prostaglandin D 2 thromboxane B 2 and 6-ketoprostaglandin Fla was not observed. This pattern of drug activity is indicative of truly specific inhibition.

Leukotriene antagonists may be identified by observing the contractions elicited in preparations of guinea-pig ileum strips suspended in a physiological buffer by addition of pure leukotriene D 4

(LTD

4 The ileum strips are connected to an isotonic transducer, and the contractions are continuously recorded on a multichannel recorder.

Before addition of LTD 4 atropine and indomethacin are added to the buffer in order to block any cholinergic or prostaglandinmediated contractile effects. Test compounds to be studied with respect to leukotriene antagonism are dissolved in DMSO and added to the organ bath 2 minutes prior to -9 addition of LTD 4 at 10 M (final concentration), the final concentration of DMSO being a concentration which can be shown not to affect the ileum response to LTD 4 The test I. Ahnfelt-Ronne, D. Kirstein and C. Kargaard- Nielsen, European J. Pharmacol. 155 (1988) 117.

SUBSTITUTE

l r i ii WOi 89/05294 PCT/DK88/00188 8 compounds may be added at various concentrations, often beginning at 10 M and then decreasing the concentration in case of antagonism.

When the compounds of the present invention were added to the ileum preparation before addition of LTD 4 a significant inhibition occurred of the specific LTD4-induced contraction. In several cases this inhibition occurred at concentrations in the submicromolar range, e.g. with a compound according to one of the Examples 1 to 6 or 8 to 19 or 21 to 22 (all Examples except 7 and 20). On the other -7 hand, contractions induced with histamine at 10 7 M were not inhibited by these compounds even at micromolar concentrations.

Leukotrine antagonists may be further characterized using guinea-pig tracheal strips instead of ileum strips In this relevant in vitro model of human airways (11) tracheal strips are suspended in a physiological buffer containing indomethacin. A concentration-response curve to

LTD

4 is generated in the presence and absence of the leukotriene antagonist. From these curves the potency of a leukotriene antagonist may be expressed as the pKB value, the negative logarithm of the antagonist dissociation constant.

The pK B value is determined as -log([antagonist]/(dose ratio where the dose ratio is defined as EC 50 (presence of antagonist)/EC 50 (absence of antagonist) and EC 50 refers to the concentration of LTD 4 eliciting 50% of the maximum response to LTD 4 This is the generally accepted way of expressing leukotriene antagonistic potency independent of LTD 4 concentration. pKB values for the compounds according to the Examples 1, 9 and 10 were found to be 8.3, 9.5 and 8.4, respectively.

It is of importance to investigate the receptor binding properties of leukotriene antagonists in relation to (11) R.M. Muccitelli, S.S. Tucker, D.W.P. Hay, T.J.

Torphy and M.A. Wasserman, J. Pharmacol. Exp. Ther.

243 (1987) 467.

(12) R.F. Furchgctt, in: Handbook of Experimental Pharmacology, vol 33 (1972), eds. 0. Eichler, A. Farah, H. Herken and A.D. Welch (Springer Verlag, New York) p. 283.

pseudo halogen, cyano, nitro, amino, substituted amino, carboxy, carbalkoxy, carbamyl, hydroxy, alkyl, alkoxy; n and m are the same or different and stand for an integer from 0-6; provided that n cannot be zero when A stands for WO 89/05294 PCT/DK88/00188 9 their pKB values i.e. to correlate antagonist receptor blocking with inhibition of smooth muscle contraction.

Receptor binding studies may be performed with guinea-pig lung membranes in a direct competition assay between a 3 eukotriene antagonist and H]LTD 4 for binding to the LTD 4 receptor (10,13). A pIC 50 value is determined as the negative logarithm of the molar concentration of antagonist inhibiting [3H]LTD 4 binding by 50%. pIC50 values for the compounds according to the Examples 1, 9 and 10 were found to be 7.3, 8.1 and 7.5, respectively. These pIC 50 values were observed to correlate with the antagonist pKB values, proving that the inhibition of smooth muscle contraction by the present compounds in fact depends mechanistically on binding to the LTD. receptor.

The present invention also relates to a method for producing the present compounds.

In one embodiment, an amine of the formula II R2

R

3 R4 R- N I--(CH )n-NHR1 II N in which R, R, R R R4, R 5 and n have the above meanings, is reacted with a compound of the formula III

R

6

R

7 X-Q-A Iii

Y-(CH

2 in which R R 7 X, Q, A and m have the above meanings, and Y is capable of forming a "good leaving group", Y thus standing for e.g. a halogen atom. such as chlorine, bromine or iodine, or an alkyl- or arylsulphonyloxy group, but other leaving groups can be used as well, such as an alkylsulphate (13) S. Mong, Wu, M.O. Scott, M.A. Lewis, M.A.

Clark, B.M. Weichman, C.M. Kinzig, J.G. Gleason and S.T. Crooke, J. Pharmacol. Exp. Ther. 234 (1985) 316.

SUBSTITUTE

WO 89/05294 PCT/DK88/00188 group, a chlorosulphonyloxy group, an alkylsulphite group, a mono- or dialkylphosphate group or a nitrate group, to form a compound of the formule I.

The reaction is performed in a suitable inert organic solvent, such as methanol, ethanol, dimethylformamide or hexamethyl phosphoric triamide, but other solvents can be used as well; the reaction is performed at a temperature about or above room temperature, up to the boiling point of the solvent used. In some cases it can, however, be convenient to cool the reaction mixture below room temperature, depending on the nature of the compound of the formula III used. The reaction is also conveniently performed in the presence of an organic base, such as pyridine, triethylamine, sodium methanolate or sodium ethanolate or in the presence of a suitable inorganic base, such as an alkalimetal hydroxide, an alkalimetal carbonate or an alkalimetal hydrogen carbonate, but other bases can be used as well. The crude reaction products of the formula I are collected by filtration, if convenient after dilution with e.g. water, or are extracted from the reaction mixture with a suitable solvent, such as diethyl ether, ethyl acetate, dichloromethane or chloroform. The products are purified e.g. by recrystallization or by chromatography, if convenient after conversion to salts with suitable inorganic or organic acids as defined above.

In another embodiment, an amine of the formula II in which R 1 stands for hydrogen is converted to a compound of the formula I, in which R 1 stands for hydrogen by reductive alkylation, e.g. by reaction with a carbonyl compound of the formula IV R R SX-Q-A IV 35OHC-(CH2m in which R 6

R

7 X, Q, A and m have the above meanings, followed by hydrogenation in the presence of a suitable catalyst or by reduction e.g. with an alkalimetal bord- T T ITC WO 89/05294 PCT/DK88/00188 11 hydride. The hydrogenation or reduction can, if convenient, be performed simultaneously with the reaction with the carbonyl compound, that is, without isolation of the intermediary, so called Schiff-base.

The reaction is performed in a suitable inert organic solvent, such as methanol or ethanol, but other solvents can be used as well. The reaction is preferably performed at ambient temperature, but in some cases it is convenient to cool the reaction mixture below room temperature, or to heat the reaction mixture above room temperature, up to the boiling point of the solvent used, depending on the nature of the reactants of the formulae II and IV used. The isolation and purification of the products can be performed as described above.

In still another embodiment a compound of the formula V R R R R7 X-Q-A

V

o (CH 2 n

-N-(CH

2 Ho 2n 2m in which R 1 R, R 5

R

6

R

7 X, Q, A, n and m have the above meanings, is reacted with a compound of the formula VI 2

PR

3

VI

a N CH2Y 2 in which R 2

R

3 and Y have the above meanings, to form the desired compound of formula I.

The solvent and reaction conditions used are conveniently as described above for the alkylation of amines of the formula II, but other solvents and/or reaction conditions can be used as well, depending on the nature of the compounds of formulae V and VI which are reacted.

In a further embodiment a compound of the formula VII

SUBSTITUTE

R' 04 i i. i L- C WO 89/05294 PCT/DK88/00188

R

1 CH -N-(CH 2n 2 m XH VII in which Ri, R 2

R

3

R

4

R

5

R

6

R

7 n and m have the above meanings, and X stands for 0, S or NHR 8 where R 8 has the above meanings, is reacted with a compound of the formula

VIII

Y-Q-A (VIII) in which A, Q, and Y have the above meanings, to form the desired compound of formula I.

The solvent and reaction conditions used are conveniently as described above for the alkylation of amines of the formula II, but other solvents and/or reaction conditions can be used as well, depending on the nature of the compound of the formulae VII and VIII which are reacted.

Additionally, the acidic functionalities A can be prepared according to the following general reaction schemes: N N

CN

-C I1 N -N

H

-COOR

9

CONHOH

diaz. -SO 3

H

-NH NZ -SO2C1 2-NHR

-SO

2

NHR

1 0

SUBSTJTUTE

atom, Y may be CH 2 0, R 2 is hydrogen oder lower alkyi ana ^3 is lower alkyl, perfluoro lower alkyl or perfluorophenyl.

LU WO 89/05294 PCT/DK88/00188 13 having the same meanings as R1 The present compounds are intended for use in pharmaceutical compositions which are useful in the treatment of the above mentioned diseases.

The amount required of a compound of formula (I) (hereinafter referred to as the active ingredient) for therapeutic effect will, of course, vary both with the particular compound, the route of administration and the mammal under treatment. A suitable dose of a compound of formula for a mammal suffering from e.g an inflammatory condition as defined hereinbefore is 0.5 to 100 mg per kilogram bodyweight, the most preferred dosage being 0.5 to mg/kg of mammal bodyweight, for example 5 to 25 mg/kg; administered once or more times daily.

In the case of the treatment or prophylaxis of inflammatory airway conditions, a suitable anti-asthmatic dose of a compound of formula is 1 pg to 50 mg of compound per kilogram bodyweight, the most preferred dosage being 1 pg to 10 mg/kg of mammal bodyweight, for example from 1 pg to 5 mg/kg.

While it is possible for an active ingredient to be administered alone as the raw chemical, it is preferable to -present it as a pharmaceutical formulation. Conveniently, the active ingredient comprises from 0.1% to 100% by weight of the formulation. Conveniently, dosage units of a formulation contain between 0.1 mg and 1 g of the active ingredient. For topical administration, the active ingredient preferably comprises from 1% to 2% by weight of the formulation but the active ingredient may comprise as much as 10% w/w. Formulations suitable for nasal or buccal administration, (such self-propelling powder-dispensing formulations described hereinafter), may comprise 0.1 to w/w, for example about 2% w/w of active ingredient.

By the term "dosage unit" is meant a unitary, i.e. a single dose which is capable of being administered to a patient, and which may be readily handled and packed, remaining as a physically and chemically stable unit dose comprising either the active material as such or a mixture of it with solid or liquid pharmaceutical diluents or

SUBSTITUTE

i WO 89/05294 PCT/DK88100188 14 carriers.

The formulations, both for veterinary and for human medical use, of the present invention comprise an active ingredient in association with a pharmaceutically acceptable carrier therefor and optionally other therapeutic ingredient(s). The carrier(s) must be "acceptable" in the sense of being compatible with the other ingredients of the formulations and not deleterious to the recipient thereof.

The formulations include those in a form suitable for oral, ophthalmic, rectal, parenteral (including subcutaneous, intramuscular and intravenous), intra-articular, topical nasal or buccal administration.

The formulations may conveniently be presented in dosage unit form and may be prepared by any of the methods well known in the art of pharmacy. All methods include the step of bringing the active ingredient into association with the carrier which constitutes one or more accessory ingredients. In general, the formulations are prepared by uniformly and intimately bringing the active ingredient into association with a liquid carrier or a finely divided solid carrier or both, and then, if necessary, shaping the product into the desired formulation.

Formulations of the present invention suitable for oral administration may be in the form of discrete units as capsules, sachets, tablets or lozenges, each containing a predetermined amount of the active ingredient; in the form of a powder or granules; in the form of a solution or a suspension in an aqueous liquid or non-aqueous liquid; or in the form of an oil-in-water emulsion or a water-in-oil emulsion. The active ingredient may a.2so be administered in the form of a bolus, electuary or paste.

A tablet may be made by compressing or moulding the active ingredient optionally with one or more accessory ingredient. Compressed tablets may be prepared by compressing, in a suitable machine, the active ingredient in a free-flowing form, such as a powder or granules, optionally mixed with a binder, lubricant, inert diluent, surface active or dispersing agent. Moulded tablets may be made by moulding, in a suitable machine, a mixture of the powdered WO 89/05294 PCT/DK88/00188 active ingredient and a suitable carrier moistened with an inert liquid diluent.

Formulations for rectal administration may be in the form of a suppository incorporating the active ingredient and a carrier such as cocoa butter, or in the form of an enema.

Formulations suitable for parenteral administration conveniently comprise a sterile oily or aqueous preparation of the active ingredient which is preferably isotonic with the blood of the recipient.

Formulations suitable for intra-articular administration may be in the form of a sterile aqueous preparation of the active ingredient which may be in microcrystalline form, for example, in the form of an aqueous microcrystalline suspension. Liposomal formulations or biodegradable polymer systems may also be used to present the active ingredient for both intra-articular and ophthalmic administration.

Formulations suitable for topical administration include liquid or semi-liquid preparations, such as liniments, lotions, applications; oil-in-water or water-in-oil emulsions, such as creams, ointments or pastes; or solutions or suspensions, such as drops. For example, for ophthalmic administration, the active ingredient may be presented in the form of aqueous eye drops as, for example, a 0.1-1.0% solution.

Formulations suitable for administration to the nose or buccal cavity include powder, self-propelling and spray formulations, such as aerosols and atomizers. The formulations, when dispersed, preferably have a particle size in the range of 10 to l00u.

Such formulations are most preferably in the form of a finely comminuted powder for pulmonary administration from a powder inhalation device or self-propelling powder-dispensing formulations, where the active ingredient, as a finely comminuted powder, may comprise up to 99.9% w/w of the formulation. In the case of self-propelling solution and spray formulations, the effect may be achieved either by choice of a valve having the desired spray characteristics SUBSTITUTE 3' n> i 1 WO 89/05294 PCT/DK88/00188 16 being capable of producing a spray having the desired particle size) or by incorporating the active ingredient as a suspended powder in controlled particle size. These selfpropelling formulations may be either powder-dispensing formulations or formulations dispensing the active ingredient as droplets of a solution or suspension.

Self-propelling powder-dispensing formulations preferably comprise dispersed particles of solid active ingredients, and a liquid propellant having a boiling point below 180C at atmospheric pressure. The liquid propellant may be any propellant known to be suitable for medicinal administration and may comprise one or more C -C 6 -alkyl hydrocarbons or halogenated C 1

-C

6 -alkyl hydrocarbons or mixtures thereof; chlorinated and flourinated C 1 -C6-alkyl hydrocarbons are especially preferred. Generally, the propellant constitutes 50 to 99.9% w/w of the formulation whilst the active ingredient constitutes 0.1 to 20% w/w, for example about 2% w/w, of the formulation.

The pharmaceutically acceptable carrier in such selfpropelling formulations may include other constituents in addition to the propellant, in particular a surfactant or a solid diluent or both. Surfactants are desirable since they prevent agglomeration of the particles of active ingredient and maintain the active ingredient in suspension. Especially valuable are liquid non-ionic surfactants and solid anionic surfactants or mixtures thereof. Suitable liquid non-ionic surfactants are esters and partial esters of fatty acids with aliphatic polyhydric alcohols, for instance, sorbitan monooleate and sorbitan trioleate, known commercially as "Span 80" (Trade Name) and "Span 85" (Trade Name), respectively. The liquid non-ionic surfactant may constitute from 0.01 up to 20% w/w of the formulation, though preferably it constitutes below 1% w/w of the formulation. Suitable solid anionic surfactants include alkali metal, ammonium and amine salts of dialkyl sulphosuccinate (where the alkyl groups have 4 to 12 carbon atoms). The solid anionic surfactants may constitute from 0.01 up to 20% w/w of the formulation, though preferably below 1% w/w of the composition,.Solid diluents may be advantageously incorporated in such self- L IRI TITMITF C- WO 89/05294 PCT/DK88/00188 17 propelling formulation where the density of the active ingredient differs substantially from the density of the propellant; also, they help to maintain the active ingredient in suspension. The solid diluent is in the form of a fine powder, preferably having a particle size of the same order as that of the particles of the active ingredient.

Suitable solid diluents include sodium chloride, sodium sulphate and sugars.

Formulations of the present invention may also be in the form of a self-propelling formulation wherein the active ingredient is present as such in suspension or in solution.

Such self-propelling formulations may comprise the active ingredient, propellant and co-solvent, and advantageously an anti-oxidant stabiliser. The propellant is one or more of these already cited above. Co-solvents are chosen for their solubility in propellant, their ability to dissolve the active ingredient, and for their having the lowest boiling point consistent with these above-mentioned properties.

Suitable co-solvents are C -C -alkyl alcohols and ethers and mixtures thereof. The co-solvent may constitute 5 to 40% w/w of the formulation, though preferably less than 20% w/w of the formulation. Antioxidant stabilisers may be incorporated in such solutions-formulations to inhibit deterioration of the active ingredient and are conveniently alkali metal ascorbates or bisulphites. They are preferably present in an amount of up to 0.25% w/w of the formulation.

Such self-propelling formulations may be prepared by any method known in the art. For example, the active ingredient (either as particles as defined hereinbefore as such or in suspension in a suitable liquid or in up to 20% w/v solution in an acceptable co-solvent, as appropriate) is mixed with any other constituents of o pharmaceutically acceptable carrier. The resulting mixture is cooled, introduced in a suitable cooled container, and propellant is added thereto in liquid form; and the container is sealed.

Alternatively, such self-propelling formulations may be prepared by mixing the active ingredient either in particles as hereinbefore defined or in 2 to 20% w/v alcohol or aqueous solution as appropriate, together with the remaining ,-SUBSTITJTr WO 89/05294 PpCT/DK88100188 18 constituents of the pharmaceutically acceptable carrier other than the propellant; introducing the resulting mixture, optionally with some propellant, into a suitable container; and injecting the propellant, under pressure, into the container at ambient temperature through a valve which comprises a part of the container and is used to control release of the formulation from it. Desirably, the container is purged by removing air from it at a convenient stage in the preparation of the self-propelling formulation.

A suitable container for a self-propelling formulation is one provided with a manually-operable valve and constructed of aluminium, stainless steel or reinforced glass. The valve should, of course, be one having the desired spray characteristics of particle size as hereinbefore defined. Advantageously, the valve is of the type which delivers a fixed amount of the formulation on the occasion of each operation of the valve, for example, about to 100 microlitres of formulation in each delivery.

Formulations of the present invention may also be in the form of an aqueous or dilute alcoholic solution, optionally a sterile solution of the active ingredient for use in a nebuliser or atomizer, wherein an accelerated air stream is used to produce a fine mist consisting of small droplets of the solution. A buffering agent and a surface active agent may also be included in such a formulation which should also contain a preservative such as methylhydroxybenzoate.

Other formulations suitable for nasal administration include a fine powder having a particle size of 10 to 100 microns which is administered in the manner in which snuff is taken, i.e. by rapid inhalation through the nasal passage from a container of the powder held close up to the nose.

In addition to the aforementioned ingredients, the formulations of this invention may include one or more additional ingredients, such as diluents, buffers, flavouring agents, binders, surface active agents, thickeners, lubricants, preservatives, e.g. methylhydroxybenzoate (including anti-oxidants), emulsifying agents and ;i C WO 89/05294 PCT/DK(88/00188 19 the like.

The compositions may further contain other therapeutically active compounds usually applied in the treatment of the above mentioned pathological conditions, for instance glucocorticoids, anti-histamines, platelet activating factor (PAF) antagonists, anticholinergic agents, methyl xanthines, p-adrenergic agents, salicylates, indomethacin, flufenamate, naproxen, timegadine, gold salts, penicillamine, serum cholesterol-reducing agents, retinoids, zinc salts, and salicylazosulfapyridin (Salazopyrin).

According to the invention, the present compounds are administered to a patient suffering from one of the above mentioned pathological conditions in a daily dose (for adults) from 0.1 mg to 7000 mg, preferably from 35 3500 mg, and in the veterinary practice correspondingly in daily doses from 0.5 to 100 mg/kg bodyweight.

The invention will now be further described in the following non-limiting Examples: Example 1 3-(2'-Quinolylmethoxy)-N-(3"-carboxymethoxybenzyl)aniline To a solution of 3-(2'-quinolylmethoxy)aniline g, 10 mmole) in methanol (100 ml), 3-formylphenoxyacetic acid (2.0 g) is added, and the mixture is stirred at ambient temperature for 1 hour. The precipitated -quinolylmethoxy)-N-(3"-carboxymethoxybenzylidene)aniline is collected by filtration, washed with a minor amount of methanol and with diethyl ether and dried in air. It is then suspended in ethanol (200 ml), and sodium borohydride is added in portions during 1 hour, while stirring at ambient temperature. The resulting mixture is filtered through filter aid and evaporated in vacuo. The residue is treated with water, and the.resulting solution is neutralized to pH 7.0 using dilute acetic acid. It is then extracted twice with ethyl acetate (about 150 ml), and the organic layer is separated, dried (MgSO 4 and evaporated in vacuo to give the title compound, which after recrystallization from ethanol is obtained with a melting point of 122-1240C dec.

SSUBSITITUTE

Examples 2-16 By following the procedure of Example I and using the appropriate starting materials, compounds of Table I are obtained. 5164 ooCH N HO 2

X-Q-COOH

(CH 2 NH(CH 2 )m Table I: Position PositionMetn Ex. No. of bond of bond n m X Q etn Remarks in ring B in ring C point 2 3.1 2" 0 bond bond 168-170 0

C

3 31 3 1 0 bond bond 166-168 0

C

4 31 1 0 bond bond 180-182 0 C hydrate 4' 4"1 1 0 bond bond 240 0 C sodiumn salt, dihydrate 6 31 411 1 1 bond bond 175-177 0 C dihydrate 7 41 41" 1 1 bond bond 225-227 0

C

8 3' 4" 1 0 bond -CH 2- 138-140 0 C hemihydrate 9 3' 21' 0 1 oxygen -CH 2 151-152 0

C

3' 4 0 1 oxygen -CH 2- 195-2350C sodium salt, trihydrate 1131 2"1 0 1 oxygen -(CH 2 2 80- 85 0 C hydrate 12 3' 4" 0 1 oxygen -CH (CH 3 187-189 0 C dhdohoie yrt 13 4' 2" 0 1 oxygen -CH (CH 3- 175-179 0 C dihydlrochloride, tr-ihvdrate 14 3' 2'1 0 1 oxygen -(CH 2) 3- 137-138 0

C

33 0 1 oxygen -(CH 2 3 160-16 2 C dihydrochioride, hydrate .63' 4" 0 1 oxygen -(CH 2 3 15 5-170 0 C dihydrochloride, hemihydrate WO 89/05294 PCT/DK88/00188 21 Example 17 3 2'-Quinolylmethoxy)-N-( lH-tetrazolyl )benzyl )aniline A mixture of -quinolylmethoxy)-N-(4"-cyanobenzyl)aniline (0.75 g, 2 mnnole), sodium azide (0.5 g), ammnonium chloride (0.2 g) and dimethyl formamide (15 ml) is stirred at 120 0 C for 5 hours. The resulting mixture is, after cooling, carefully poured into a mixture of ice and water, whereafter an excess of dilute acetic acid is added to precipitate the title compound. It is collected by filtration and dissolved in an equimolar amount of dilute potassium hydroxide. After evaporation in vacuo and reevaporation several times with ethanol, the residue is triturated with -propanol to give the potassium salt of the title compound as a dihydrate having a melting point higher than 250 0 C Example 18 2'-Quinolylmethoxy)-N7( lH-tetrazolyl )benzyl )ariiline By following the procedure of Example 17, but replacing 3-(2 2' -quinolylmethoxy) -cyanobenzyl) aniline with -quinolylmethoxy)-N-(3"--cyanobenzyl )aniline, the title compound is obtained as a hydrate with a melting point of 116-118' C.

Example 19 3-(2'-Quinolylmethoxy )-N-(4"-(lH-tetrazolyl)(3-propyloxy benzyl )aniline By following the procedure of Example 17, but replacing 2'-quinolylmethoxy)-N-( 4" -cyanobenzyl )aniline with 2'-quinolylmethoxy)-N-(4" -cyano(3-propyloxy)benzyl aniline, the title compound is obtained as a dihydrate of the dihydrochloride with a melting point of 115-117o C.

Example -Quinolylmethoxy)-N-(3"-fluorobenzyl '-hydroxaminocarbonvlbenzyl )aniline A mixture of -quinolylmethoxy)-N-(3"-fluorobenzyl)-N-(4'' '-carbomethoxybenzyl)aniline (2.4 g, 4.7 WO 89/05294 PCT/DK88/00188 22 mmole), hydroxylamine hydrochloride (1.4 g, 20 mmole), 6.2 N potassium hydroxide (5 ml) and methanol (25 ml) is stirred at ambient temperature for about 48 hours. The resulting solution is then acidified using 4N acetic acid to precipitate the title compound which is obtained as a hemihydrate with a melting point of 157-1600C.

Example 21 3-(2'-Quinolylmethoxy)-N-(2"-hydroxaminocarbonylphenyl)aniline By following the procedure of Example 20, but replacing 3-(2'-quinolylmethoxy)-N-(3"-fluorobenzyl)-N- -(4'''carbomethoxybenzyl)aniline with 3-(2'-quinolylmethoxy)-N-(2"carbethoxyphenyl)aniline, the title compound is obtained with a melting point of 184-1870C.

Example 22 4-(2'-Quinolylmethoxy)-N-(2"-carboxymethoxybenzyl)-aniline By following the procedure of Example 1, but replacing 3-(2'-quinolylmethoxy)aniline with 4-(2'-quinolylmethoxy)aniline and 3-formylphenoxyacetic acid with 2-formylphenoxyacetic acid, the title compound is obtained as a dihydrochloride, pentahydrate with a melting point 215-217°C.

SUBSTITUTE

Claims (9)

1. A compound of the formula I R 2 R R R R R 2 X-Q-A CH -N-(CH2 I 2 in which formula I R 1 stands for hydrogen, straight or branched, saturated or unsaturated, unsubstituted or substi- tuted Ci-C 8 -alkyl, aryl or for ar-C 1 -C 4 -alkyl, aryl or ar being unsubstituted or substituted phenyl, the above substi- tution being one or more of the following substituents: halogen, pseudo halogen, such as trifluoro methyl, cyano, nitro, amino, substituted amino, carboxy, carbalkoxy, carbamyl, hydroxy, alkyl, alkoxy; R 2 R 3 R 4 R 5 R 6 and R 7 are the same or different and stand for hydrogen, halogen, pseudo halogen, cyano, nitro, amino, substituted amino, carboxy, carbalkoxy, carbamyl, hydroxy, alkyl, alkoxy; n and m are the same or different and stand for an integer from 0-6; provided that n cannot be zero when A stands for carboxy and X and Q both stand for a bond; X stands for a bond or for 0, S, S(0) 2 or for NR 8 where R 8 is defined as R above; Q stands for a bond or for straight or 1 seAecAed -roi branched, C 1 -C 6 alkylene; A stands for an acidic group,/e.g- fe carboxy, 1H-tetrazolyl, a sulphonic acid group, a sulfamyl group, a sulphinic acid group or a hydroxamic acid group, and pharmaceutically acceptable, non-toxic salts and in-vivo hydrolyzable.esters thereof.

2. A compound according to formula I of claim 1, in which -X-Q-A stands for a carboxy-C 1 -C6-alkoxy or a 1H-tetrazolyl group. r

3. A salt according to claim 1, in whicL the salt is __SU 7ITUTE _I WO 89/05294 PCT/DK88/00188 24 selected from the group consisting of salts formed with hydrochloric, hydrobromic and hydroiodic acid, phosphoric acid, sulphuric acid, nitric acid, p-toluenesulphonic acid, methanesulphoric acid, formic acid, acetic acid, propionic acid, citric acid, tartaric acid, and maleic acid, and alkali metal salts and alkaline earth metal salts, such as lithium, sodium, potassium, magnesium, calcium salts, as well as salts with ammonia and suitable non-toxic amines, such as C 1 -C 6 alkylamines, e.g. triethylamine, C 1 -C 6 -alkanol- amines, e.g. diethanolamine or triethanolamine, procaine, cycloalkylamines, e.g. dicyclohexylamine, benzylamines, e.g. N-methylbenzylamine, N-ethylbenzylamine, N-benzyl-p- -phenethylamine, N,N'-dibenzylethylenediamine or dibenzyl- amine, and heterocyclic amines, e.g. morpholine and N-ethyl- plyeridine.

4. A compound of claim 1 which is selected from the group consisting of 3-(2'-quinolylmethoxy)-N-(3"-carboxymethoxybenzyl)aniline; 3-(2'-quinolylmethoxy)-N-(2"-carboxymethoxybenzyl)aniline; 3-(2'-quinolylmethoxy)-N-(4"-carboxymethoxybenzyl)aniline; 3-(2'-quinolylmethoxy)-N-(4"-(l-carboxyethoxy)benzyl)- aniline; 3-(2'-quinolylmethoxy)-N-(2"-carboxy-(3-propyloxy)benzyl)- aniline; 3-(2'-quinolylmethoxy)-N-(4"-(lH-tetrazolyl)benzyl)aniline; 3-(2'-quinolylmethoxy)-N-(3"-(1H-tetrazolyl)benzyl)aniline 3-(2'-quinolylmethoxy)-N-(4"-(1H-tetrazolyl)(3-propyloxy)- benzyl)aniline; 3-(2'-quinolylmethoxy)-N-(3"-fluorobenzyl)-N-(4'''-hydrox- aminocarbonylbenzyl)aniline.

A pharmaceutical preparation, containing a compound according to any one of claims 1 4 a1n- r together with the necessary auxiliary agents.

6. A method of treating patients in need of treatment characterized in administering to said patients an effective amount of one or more compounds according to any of claims i Cl R!C!'ITI rre l-.L1-Crl i I~ I-1 WO 89/05294 PCT/DK8/00188 1 4, if necessary together or in combination with one or more other therapeutically active components.

7. Method for producing a compound of formula I according to claim 1, in which a) an amine of the formula II R2 R3 R 4 R 2 3 4 (CH2)n-NHR1 I tI (N CH in which R 1 R 2 R 3 R 4 R 5 and n have the meanings defined in claim 1, is reacted with a compound of the formula III R6 R7 S -YX-Q-A III Y-(CH d in which R 6 R 7 X, Q, A and m have the above meanings defined in claim 1, and Y is capable of forming a "good leaving group", such as chlorine, bromine or iodine, an alkyl- or arylsulphonyloxy group, an alkylsulphate group, a chlorosulphonyloxy group, an alkylsulphite group, a mono- or dialkylphosphate group or a nitrate group, to form a compound of the formula I; or b) an amine of the formula II in which R 1 stands for hydrogen is converted to a compound of the formula I, in which R 1 stands for hydrogen by reductive alkylation, e.g. by reaction with a carbonyl compound of the formula IV R 6 R 7 Si X-Q-A IV OHC-(CH _-0 2 m 1 in which R 6 R7, X, Q, A and m have the above meanings, followed by hydrogenation in the presence of a suitable catalyst or by reduction e.g. with an alkalimetal boro- JPCT I-T 1 I I WO 89/05294 PCT/DK8/00188 26 hydride, the hydrogenation or reduction, if convenient, being performed simultaneously with the reaction with the carbonyl compound, that is, without isolation of the intermediary, so called Schiff-base to form the desired compound of formula I; or c) a compound of the formula V R 4 R 5 Rg R7 X-Q-A V (CH2)n-N-(CH2) m H n m (C in which R 1 R 4 R 5 R 6 R 7 X, Q, A, n and m have the above meanings, is reacted with a compound of the formula VI R3 N H2 in which R 2 R 3 and Y have the above meanings, to form the desired compound of formula I; or d) a compound of the formula VII R R R. R. R R, 2 3 4 3 6 C H 1 1 C VI1 CH2)nN-(C H XH VII CH 2 in which R 1 R 2 R 3 R 4 R' 6 R 7 n and m have the above meanings, and X stands for 0, S or NHR 8 where R 8 has the above meanings, is reacted with a compound of the formula VIII Y-Q-A (VIII) in which A, Q, and Y have the above meanings, to form the desired compound of formula I; the acidic functionalities optionally being prepared according to the following general reaction schemes: SUBSTITUTE i -27- -CMAI H -CQoR, cO/VHOH -so, H cd';a -NH: Z -o S 0c- -st H -s o, VHR,. R 10 having the same meaning as R 1

8. A compound of the formula I as defined in claim 1, substantially as herein described with reference to any one of the Examples.

9. A method for producing a compound of formula I as defined in claim 1 which method is substantially as herein described with reference to any one of the Examples. A product of formula I as defined in any one of claims 1 to 4 whenever prepared by the method of claim 7 or claim 9. DATED this 17th day of September, 1991. LEO PHARMACEUTICAL PRODUCTS LTD. A/S (Lovens kemiske Fabrik Produktionsaktieselkskab) By their Patent Attorneys: CALLINAN LAWRIE A U V CII-iY~~ -i INTERNATIONAL SEARCH REPORT International Application No PCT/DK88/00188 1. CLASSIFICATION OF SUBJECT MATTER (it several classification symbols apply, indicate all) According to international Patent Classification (IPC) or to both National Classification and IP4 C 07 D 215/12, 215/14, 215/18, 215/20, 215/22, 215/24, 215/26, 215/32, 215/38, 215/40. 215/42, C 07 D 401/12 II. FIELDS SEARCHED Minimum Documentation Searched 7 Classification System Classification Symbols IPC 4 C 07 D Documentation Searched other than Minimum Documentation to the Extent that such Documants are Included in the Fields Searched SE, NO, DK, FI classes as above Ill. DOCUMENTS CONSIDERED TO BE RELEVANT* Category Citation of Document, with Indication, where appropriate, of the relevant passages i5 Relevant to Claim No. i' A EP, A2, 0 190 722 (USV PHARMACEUTICAL CORPORATION) 1-5, 7 I 13 August 1986 see pages 1-2, the claims A EP, A3, 0 206 751 (MERCK FROSST CANADA INC.) 1-5, 7 December 1986 see examples 85, 86, the claims A EP, A2, 0 219 307 (MERCK FROSST CANADA INC.) 1-5, 7 22 April 1987 see the whole document A EP, A3, 0 219 308 (MERCK FROSST CANADA INC.) 1-5, 7 22 April 1987 see particularly page 4 A EP, A2, 0 232 954 (AMERICAN HOME PRODUCTS 1-5, 7 CORPORATION) 19 August 1987 see particularly pages 3-5, the claims Special categories of cited documents: 10 later document published after the international filing date document defiing the general state of the art which is not or priority date and not in conflict with the application ut cited to understand the principle or theory underlying the considered to be of particular relevance invention earlier document but published on or ater the international document of particular relevance; the claimed invention filing date cannot be considered novel or cannot be considered to document which may throw doubts on priority claim(s) or involve an inventive step which is cited to establish the publication date of another document of particular relevance; the claimed Invention citation or other special reason (as specified) cannot be considered to involve an Inventive step when the document referring to an oral disclosure, use, exhibition or document is combined with one or more other such doc"- other means mients, such combination being obvious to a person skilled document published prior to the international filing date but in the art. later than the priority date claimed document member of the same patent family IV. CERTIFICATION Date of the Actual Completion of the International Search Date of Mailing of this International Search Report

1989-03-08 1989 -03- 0 International Searching Authority Signature of A~thorlzed Officer Swedish Patent Office Eva Johansson Form PCT/ISA210O (second sheet) (January 1985) I 1 -11 r-_ International Application No, PCT/DK88/00188 111. DOCUMENTS CONSIDERED TO BE RELEVANT (CONTINUED FROM THlE SECOND SHEET) Category Citation of Document, With idicatin, wtre appropriate, of ttm relsvaflt passages Relevant to Claim No A A A EP, A2, 0 233 763 (MERCK FROSST CANADA INC.) 26 August 1987 see particularly pages 14-17, the claims EP, A2, 0 271 287 (MERCK FROSST CANADA INC.) June 1988 see particularly pages 18-19, the claims DE, Al, 36 07 382 (LEO PHARMACEUTICAL PRODUCTS LTD. A/S) 11 September 1986 see pages 9-10, the claims 1-5, 7 1-5, 7 1-5, 7 Form PCT ISA1210 (extra sheet) (JanuarY 1985) flavouring agents, binders, surface active agents, thickeners, lubricants, preservatives, e.g. methylhydroxy- benzoate (including anti-oxidants), emulsifying agents and i i ii International Application No. PCT/DK88/00188 FURTHER INFORMATION CONTINUED FROM THE SECOND SHEET V.Q OBSERVATIONS WHERE CERTAIN CLAIMS WERE FOUND UNSEARCHABLE I This international search report has not been established in respect of certain claims under Article 17(2) for the following reasons: 1.X] Claim because they relate to subject matter not required to be searched by this Authority, namely: A method of treating patients... Claim because they relate to parts of the International application tnat do not comply with the prescribed 'equlre- ments to such an extent that no meaningful International search can be carried out, soectfically: 3j Claim because they are oependent claims and are not drafted in sccoroance with tne recod and third sntences of PCT Rule 6.4{a). VI.' OBSERVATIONS WHERE UNITY OF INVENTION IS LACKING 2 This International Searching Authority found multiple Inventions in this international application as follows: 1.Q Az all required additional search fees were timely paid by the applicant, this International search report covers all searchable claims of the international application. 2. As only some of the required additional search fees were timely paid by the applicant, this international search report covers only those claims of the international application for which fees were paid, specifically claims: No required additional search fees were timely paid by the applicant. Conseouently, this International search report I1 restricted to the invention first mentioned Ir, the claims; It is covered by claim numbers: As all searchable claims could be searched without effort justifying an additional tee, the International Searching Authority did not invite payment of any additional tee. Remark on Protest SThe additional search fees were accompanied by apolicant's protest. No protest accompanied the payment of additional search fees. Form PCT/ISA210 (supplemental sheet (January 1985)