GB2207131A - Aminocyclopentyl ethers and their preparation and pharmaceutical formulation - Google Patents

Description

2 20 7 13 At 0 1 9 t AMINOCYCLOPENTYL ETHERS AND THEIR PREPARATION AND

PHARMACEUTICAL FORMULATION The endoperoxide prostaglandins G2 and H2 and thromboxane A2 are naturally occurring reactive metabolites of arachidonic acid in human platelets. They are not only potent aggregatory agents but are also constrictors of vascular and bronchial smooth muscle., and therefore substances which antagonise their effects are of considerable interest in human medicine.

In GB-A-2159816 we have described a novel class of aminocyclopentane derivatives represented hereinafter by formula (A) OR2 0 \Q---'(CH2)n X (CH 2) m C02R1 1 1 ( A having endoperoxide and thromboxene antagonist activity. The moiety R2 therein covers a variety of groupings including straight or branched Cl-salkyl substituted by phenyl which may itself be substituted by inter alia phenyl (optionally substituted by Cl-4alkyl, C,-4alkoxy or phenyl) or pheny1C1-3alkyl. Although the compounds of GB-A-2159816 exhibit good endoperoxide and thromboxane antagonist activity, duration studies have shown compounds exemplified therein to be only short-acting.

We have now surprisingly found that substitution of the second phenyl group within R2 above by selected groupings provides novel compounds which have an advantageous profile of action with respect to compounds of GBA-2159816. More particularly, the new compounds of the present invention have improved endoperoxide and thromboxane antagonist activity and/or duration of action.

The present invention thus provides compounds of the general formula (1) 1 1 It wherein:

1 _--- (CH 2) R 2 # A\_ p (CH 2) 0Alk-s / O(CH2) X(CH2) C02R1 n m Y R1 is a hydrogen atom or a methyl group; (1) X is cis or trans -CH=CH- or -CH2CH2-, m is 2, 3 or 4 and n is 1; or X is trans -CH=CH-, m is zero and n is 3; Y is a saturated heterocyclic amino group (attached to the cyclopentane ring via the nitrogen atom) which has 5-8 ring members and (a) optionally contains in the ring -0-, -5-p -SO2-, or -NR3a_; and/or (b) is optionally substituted by one or more C 1-4 alkyl groups; Alk is a straight or branched C1-5 alkyl chain; 1 is zero or 1; p is zero, 1, 2, 3 or 4; R2 is a hydroxyl group or a group selected from - OCOR3, _CO2R3 3R, -NHCOR, t -NHSO2R'9 -SO2R, -SR, -NR -COR -CONR3R4, -S02NR 4 '3 3R 49 -NHCONOR4 and -NHCSNH2; R3, R3a and R4,.which may be the same or different, represent a hydrogen atom or a C1-4 alkyl or C7-1. aralkyl group; and R5 is a C1-4 alkyl group; and the physiologically acceptable salts, solvates and cyclodextrin complexes thereof.

The structural formulae herein are to be understood to include the enantiomers of each of the compounds concerned as well as mixtures of the enantiomers including racematesy even though the precise structures as set out only relate to one enantiomer.

It will be appreciated that the present invention includes compounds of formula (A) and (ljB):

1 i i i 1 i 1 1 1 i 1 i 1 i j i j 1 1 i 1 1 1 11 1 (CH 2) R 2 (CH2) 0-0 0Alk-w 7 T---O(CH2) n X(CH2) m C02 R1 Y (A) (CH 2) R 2 (CH2)JJ-\ # 0Alk--0---O(CH2)n X(CH2)m C02R1 V.

Y (16) Suitable physiologically acceptable salts of the compounds of general formula (1) include acid addition salts derived from inorganic and organic acids, such as hydrochlorides, hydrobromides, sulphates, phosphates, maleates, tartrates, citrates, benzoates, 2-chlorobenzoates, p-toluenesulphonates, methanesulphonates, salicylates, fumarates, lactates, hydroxynaphthalenecarboxylates (eg. 1-hydroxy or 3-hydroxy-2-naphthalenecarboxylates) or furoates. When R1 is a hydrogen atom, the compounds may also form salts with suitable bases. Examples of such salts are alkali metal (eg. sodium and potassium), alkaline earth metal (eg. calcium or magnesium), ammonium and substituted ammonium (eg. dimethylammonium, triethylammonium, 2- hydroxyethyldimethylammonium, piperazinium, NN-dimethylpiperazinium, piperidinium, ethylenediammonium and choine).

The heterocyclic amino group Y may for example have a 5,6 or 7-membered ring, eg pyrrolidino, piperidino, morpholino, piperazino, thiomorpholino, 1,1-dioxothiomorpholinot homomorpholino and hexamethyleneimino. The carbon atoms of the heterocyclic rings may be a substituted, for example.. by a methyl, ethyl or butyl group. Examples of the optional substituent R3a which may be present on the second nitrogen atom in the ring are methyl, ethyl, butyl, benzyl and phenethyl. In particular. the group Y may represent a saturated heterocyclic amino group which has 5, 6 or 7 ring members and optionally contains in the ring -0-.

In general, Y is preferably pyrrolidino, piperidino or hexamethyleneimino, optionally 'substituted by one or two Cl-4 alkyl (particularly methyl) groups. Especially preferred Y groups are piperidino and hexamethyleneimino.

In general, R1 is preferably a hydrogen atom.

When n is 1, -(CH2)ffi- is in. particular -(CH2)27 or -(CH2),;'I especially -(CH2)2_ % Alk may be, for example, a straight or branched Cl-3 alkyl chain (e.g. methylene, ethylene or propylene). Alk preferably represents methylene or propylene.

The group -(CH2) _- # 1 (CH 2) p R 2 may be attached at the ortho, mete or pare position of the phenyl group in the rest of the molecule. Preferably ú represents zero and the group (CH2) R2 # P -(CH2) is preferably attached at the mete or, ffiore preferably, the pare position. The moiety p is preferably zero, 1 or 2.

Examples of the group R2 include hydroxy, CO2R3, -CONR3R4, -NHCOR3, NHS02R5, -S02R5. -S02NR3R49 AR3R4 and -NHCONCR4.

When R3 or R4 is a Cl-, alkyl group the Cl-4 alkyl group may be straight or branched and may be, for example, methyl, ethyl, n-propyl, i-propyl, n-butyl and t-butyl. When R 3 or R 4 is a C7-10 aralkyl group it may be, for example, benzyl or phenethyl. R3 and R4 preferably independently represent hydrogen atoms or methyl groups. Examples of i 1 i i i a i i i 1 1 1 1 1.

the group R5 include methyl, ethyl, n-propyl, i-propyl, n-butyl and tbutyl. R5 preferably represents a methyl group.

A particular group of compounds of formula (1) are those of formula (1a) 0-0 (CH 2) R 2 # % p 0Alk-O JOCH2XCH2CH2CO2H IWY (1c) and the physiologically acceptable salts solvates and cyclodextrin complexes thereof, wherein X is cis or trans -CH=CH or -CH2CH r, Y is a saturated heterocyclic amino group which has 5, 6 or 7 ring members and optionally contains in the ring -0-, Alk is a straight Cl-3alkyl chain, p is zero, 1 or 2 and R2 is as previously defined. Preferred compounds of formula (1c) are those in which R2 represents -OH, -CO2H, -CONH 21 - NHCOCH39 -NHS02CH31 -SO 2NHCH 31 -NHCONH 2 or -SO 2CH 3' Compounds of formula (1c) in which the group -(CH2)p R2 is attached at the ortho position of the phenyl group in the rest of the molecule are particularly preferred.

In generaljpreferred compounds of formula (1A) are those in which the carbon atom carrying the a-side chain (i.e. the -O(CH 2)nX(CH2)mCO2R1 group)is in the R configuration(and mixtures containing this isomer).

A particularly preferred compound of the invention is Lla(Z) 2p, 5p]-( )-6-[[2-(hexahydro-1H-azepin-l-yl)-5-[[21(hydroxymethyl)[1,11-biphenylj-4-yllmethoxylcyclopentylloxy]-4-hexenoic acid, and its physiologically acceptable salts, solvates and cyclodextrin (e.g. P-cyclodextrin) complexes.

Compounds of formula (1) have excellent endoperoxide and thromboxene antagonist activity and consequently inhibit blood platelet aggregation, bronchoconstriction and vasoconstriction. A test to determine inhibition of blood platelet aggregation is as described by Lumley and Humphrey (J. Pharmacol. Methods, 1981, fg 153-166) using collagen as the proaggregatory agent.

The ability of the compounds of the invention to inhibit vasoconstriction or bronchoconstriction is determined using the relevant isolated tissue (eg. spirally cut rat aortic strip or guinea-pig lung parenchymal strip) by measuring the effect of the compound to be tested on the contraction of the tissue to [lREla,4a,5P(Z), 6a(1E935)11-7-[6-(3-hydroxy-l-octenyl)-2-oxabicyclo[2.2.llhept-5-yll-5heptenoic acid (U-46619).

The present compounds are thus of interest for use in human and is animal medicine, more particularly for use in the treatment or prophylaxis of conditions mediated by thromboxane A2' The compounds of formula (1) may find particular use in the treatment of asthma, and in the treatment and prophylaxis of occlusive vascular disease, including myocardial infarction, cardiac fatalities, unstable angina, transient ischaemic attacks and cerebral infarctiony atherosclerosis and vessel wall disease, peripheral vascular disease, nephropathy, retinopathy, postoperative thrombosis and pulmonary embolism. The compounds are also of interest for use in renal dialysis and cyclosporin A-induced nephrotoxicity. In addition, the compounds of the invention are useful in the prophylaxis of peri- and postoperative complications following organ transplantation (particularly cardiac and renal), coronary artery bypass, peripheral artery bypass, angioplasty, thrombolysis and endarterectomy.

The compounds are also of potential use in the treatment of adult respiratory distress syndrome and the prevention of relapse of healed peptic ulcers.

The compounds may be formulated in a conventional manner for use with one or more pharmaceutical carriers.

For oral administration, the pharmaceutical composition may take the form of, for example, tablets, capsules, powders, solutionsq syrups, or suspensions prepared by conventional means with acceptable excipients.

i i j IS 1 1 The compounds may be formulated for parenteral administration by injection or continuous infusion. Formulations for injections may be presented in unit dosage form in ampoules, or in multi-dose containers, with an added preservative. The compositions may take such forms as suspensions, solutions or emulsions in oil or aqueous vehicles, and may contain formulatory agents such as suspending, stabilising and/or dispersing agents. Alternatively, the active ingredient may be in powder form for reconstitution before use with a suitable vehicle eg. sterile pyrogen-free water.

For administration by inhalation the compounds are conveniently delivered in the form of an aerosol spray presentation from pressurised packs or a nebuliser, or as cartridge from which the powdered composition may be inhaled with the aid of a suitable device. In the case of a pressurised aerosol the dosage unit may be determined by providing a valve to deliver a metered amount.

The precise dose administered will of course depend on the age and condition of the patient, the specific condition to be treated and the mode of administration.

Howeverp generallyp for use as antithrombotic agents, the compounds are preferably administered orally, for example in amounts of 0. 05 to 10m9/kg body weight, 1 to 4 times daily.

For use in the treatment of asthma, the compounds may also be administered orally in amounts of 0.05 to 10m9/kg body weight, 1 to 4 times daily. Preferably however they are administered by inhalation at doses varying from 0.02 to 30mg, preferably 0.02 to 3mg, 1 to 4 times daily.

The compounds of the invention may, if desired, be administered in combination with one or more other therapeutic agents such as a thromboxane synthase inhibitor or an antiasthmatic agent.

Suitable methods for preparing compounds of formula (1) are described below, the terms RI, R2P X, Alk, Y1 1, m, n and p being as defined above except where otherwise indicated. It will be appreciated that the following reactions may require the use of, or conveniently may be applied to, starting materials having protected functional groups, and deprotection might thus be required as a final step to yield a compound of the invention. Protection and deprotection $ 1 of functional groups may be effected using conventional techniques. Thus, for example, amino groups may be protected by acylation, subsequent deacylation being effected when desired by hydrolysis using for example an acid such as hydrochloric acid or a base (e.g. aqueous sodium hydroxide). Hydroxyl groups may be protected using conventional hydroxyl protecting groups, for example as described in 'Protective Groups in Organic Chemistry'. Ed. J. F. W. McOmie (Plenum Press, 1973) or 'Protective Groups in Organic Synthesis', by Theodore W. Greene (John Wiley and Sons, 1981). Examples of suitable 10 protecting groups include heterocyclic groups such as tetrahydropyranyl which may be removed by hydrolysis under acidic conditions.

According to a process (A) compounds of formula (1) may be prepared by reacting corresponding compounds of formula (2) is 0Alk-o _:O(CH2) n X(CH2) m C02R1 Y (2) (where A is a displaceable atom or group) or salts thereof to replace _ (CH2) R2 # p the moiety A with the group -(CH2),-\ i 1 i Displaceable atoms or groups represented by the moiety A include any conventional leaving group such as halogen (e.g. chlorine, bromine or iodine), triflate or a phosphate ester (e.g. diethylphosphate).

i (CH 2) D R 2 Replacement of the moiety A by a group i f 1 to provide a compound of formula (1) in which 1 is zero may be effected by a coupling reaction of a compound of formula (2) or a salt thereof with a compound of formula (3) C(CH2) p eh 0 0 01= ----4 --X (3) [where X is an atom or group as defined above for A or X is a group -B(DH)2 or X is a suitable metal atom or metal-containing group such as li, Cu, M9Hal, ZnHal or SnV3 Or X is a group SiC3 (wherein Hal is a halogen atom, e.g. chlorine, bromine or iodine, and R1 is a Cl-6alkyl group, e.g. methyl or n-butyl, or an aryl group, e.g. phenyl)]. It will be understood that when X represents MgHal or li the moiety R1 may not represent methyl.

In a particular embodiment of process (A) compounds of formulae (2) and (3) are reacted wherein A represents a halogen atom (e.g. bromine) and X represents a group -B(OH)2). The coupling reaction may conveniently be carried out in the presence of a suitable transition metal catalyst such as a palladium (0) or palladium (II) catalyst, for example PdL4 or PdCl2L2 (where L is a phosphine ligand such as triphenylphospine or tritolylphosphine) in a suitable solvent such as an ether (e.g. 1,2-dimethoxyethane or tetrehydrofuran), a hydrocarbon, for example an aromatic hydrocarbon (e.g. benzene), or a dipolar aprotic solvent such as N,N-dimethylformamide containing an appropriate base which may be, for example, a carbonate, bicarbonate or hydroxide of an alkali or alkaline earth metal (e.g. aqueous sodium carbonate) or a suitable amine such as a tertiary amine (e.g.

triethylamine). The reaction may be effected at any suitable temperature up to and including reflux, for example in the range 200-1200C and preferably in the range 600-800C. Ultrasonic techniques or microwave may also be used to facilitate the reaction. The coupling reaction is preferably carried out in the presence of the catalyst (Ph 3 M4Pd.

When A and X in formulae (2) and (3) are conventional leaving groups as defined for A in formula (2) the coupling reaction may be 1 1 i i 1 i 1 t 1 i 1 carried out in a single step in the presence of a suitable transition metal catalyst (e.g. a palladium or nickel catalyst) and under reducing conditions (e.g. using a reducing agent such as zinc metal or hydrazine or by electrolytic reduction). Suitable palladium catalysts include palladium-on-charcoal, a palladium (II) chloride-mercury (II) chloride couple, PdL4 and PdCl2L2 (where 1 is as defined above). Suitable nickel catalysts include nickel (II) chloride and NiCI212 (where 1 is!as defined above). The specific conditions for effecting the desired conversion will, of course, depend on the particular values of A and X in formulae (2) end (3) respectively. However.. the conditions referred to in the following publications may be suitable for present purposes Chem. letters 1986, p. 407; 3. Org. Chem. 1986, p. 2627; Tetrahedron letters 1977, p. 4089; Synthesis 1978, p. 537; Bull. Chem. Soc. Japan l980 23, p. 1767 and Tetrahedron letters 1985, p. 1655.

is When X in formula (3) is a conventional leaving group as defined for A in formula (2), the compound of formula (2) may first be converted to a compound of formula (2a) m 0Alk--- J(CH2)nX(CH2)mC'2R Y (2a) [where M is a suitable atom or metal-containing group such as Li, Cu, M9Hal, ZnHal, HgHal or SnR' 3 or X is a group SiR 1 3 (wherein Hal and R' are as previously defined)] and then the compound of formula (2a) reacted with an appropriate compound of formula (3) to give the desired product. It is to be understood that when M represents M9Hal or Li then the moiety R1 in formula (2a) may not represent a methyl group.

Compounds of formula (2a) may be prepared by treating a compound of formula (2) in which A represents a conventional leaving group such as halogen (e.g. chlorine or, more especially, bromine or iodine), triflate or a phosphate ester (e.g. diethylphosphate) with a reagent 1 i i 1 i i i i i 1 k. 1 is - 11 capable of introducing the moiety M. Suitable reagents and conditions for effecting the desired conversion are known in the art (cf. J. Am. Chem. Soc. 1987, p. 8056; J. Org. Chem. 1984, p. 5280; Chem. letters 1981, p. 829; 3. Organometal. Chem. 1983, p. 551; Tetrahedron letters 1987, p. 4715 and Tetrahedron letter 1983, p. 4895). Thus, for example, a compound of formula (2a) in which M is ZnHal may be prepared from a corresponding halo compound of formula (2) in which A is a halogen atom (e.g. bromine or iodine) by reaction with activated zinc. A compound of formula (2a) in which M is Cu may be prepared from a corresponding halo compound of formula (2) in which A is a halogen atom (e.g. bromine or iodine) by reaction with Riecke copper. A compound of formula (2a) in which M is MgHal may be prepared from a. corresponding halo compound of formula (2) in which A is a halogen atom (e.g. bromine or iodine) by reaction with magnesium or with MgHa12 (where Hal is as defined above) in tIne presence of lithium. A compound of formula (2a) in which M is Li may be prepared from a corresponding halo compound of formula (2) in which A is a halogen atom (e.g. bromine or iodine) by reaction with a suitable organolithium reagent (e.g. n-butyllithium). A compound of formula (2a) in which M is SW3 or SW3 may be prepared from a corresponding compound of formula (2) in which A is a conventional leaving group such as a halogen atom (e.g. bromine or iodine), triflate or a phosphate ester (e.g. diethylphosphate) by reaction with either R 3 1 Sn-SnR' 3 or R' 3S'-SW 3 in the presence of a suitable palladium catalyst. Alternatively, Al(SiR13)3 and a catalyst NiCl2L2 (where R' and L are as defined above) may be used to prepare a compound of formula (2a) in which M is SiRI3.

The resulting compound of formula (2a) is then treated with a compound of formula (3) in which X is a conventional leaving group such as halogen (e. g. bromine or iodine), triflate or a phosphate ester (e.g. diethylphosphate). The coupling reaction may conveniently be effected in the presence of a suitable transition metal catalyst such as a palladium or nickel catalyst (e.g. PdL., PdCl-21 NiC12 or NiC1212, where L is as defined previously) in a suitable solvent such as an ether (e.g. diethyl ether, tetrahydrofuran or 1,2-dimethoxyethene), hexamethylphosphoramide, dimethylformamide, dioxane, acetonitrile or an aromatic hydrocarbon (e.g. benzene). The specific conditions for effecting the desired reaction will, of course. depend on the particular values of M and X in formulae (2a) and (3) respectively. However. the conditions referred to in the following publications may be suitable for present purposes: Comprehensive Organometal. Chem. volume 8, p. 910; Current Trends in Organic Synthesis (Pergamon Press 1982) p. 269; 3. Am. Chem. Soc. 1941,.3, p. 2316; J. Organometel. Chem. 1984. 1679 Cl; 3. Am. Chem. Soc. 19879 109, p. 5479; J. Org. Chem. 1983. p. 1333; Tetrahedron letters 1986, p. 4407; J. Am. Chem. Soc. 1979. 101p p. 4992 and J.

Organometal. Chem. 1983. 1509 p. 551.

When X in formula (3) is a metal or metal-containing group as defined previously. the coupling reaction may be carried out with a compound of formula (2) in which A is a conventional leaving group as defined above in a single step using the conditions described above for the coupling of compounds of formulae (2a) and (3).

It is to be unders tood that the use of stoichiometric amounts of the transition metal "catalyst" may be advantageous in some of the aforementioned coupling reactions.

Intermediates of formula (3) are either known compounds or can be prepared from known compounds using methods analagous to those used to prepare the known compounds of formula (3).

The intermediates of formula (3) in which X is a group -B(OW2 are either known compounds or may be prepared by methods described by W.J. Thompson et.al. in J. Org. Chem., 1984, A9, 5237.

The boronic acids of formula (3) may be formed in situ under the conditions of the coupling reaction described hereinbefore using the corresponding anhydrides of formula (4) or (4a) which are known classes of compounds described by H.R. Snyder et.al in J. Amer. Chem.

Soc., 1958, 80, 3611 and F. R. Bean at. al. in J. Amer. Chem. Soc., 19329 549 4415.

i i i i 1 1 i (CH 2) R 27 p -IH- % # is (4) 2 (CH2)pR2 B B B R2(CH 2 -4111 1 p # 0 0 \Y'\ (CH2) p R2 (4a) The boronic acid of formula (3) where -(CH2) p R2 is 2-CH20H is formed in situ from the known cyclic ester of formula (5) 0 (5) Where suitabley the group R2 may be protected before the preparation of the corresponding boronic acid (3). Thus, for example, a hydroxyl group may be protected as a silyl ether eg as a t-butyldimethyl silyl ether.

In a further embodiment, compounds of formula (1) in which R1 is a methyl group and 1 is 1 may be prepared by reacting a compound of formula (2) (where A is a displaceable atom or group as previously defined and R1 is a methyl group) with a suitable organometallic reagent such as a tin containing reagent of formula (6) 1. 1 0-0 (CH 2) R 2 # Ar' p (R6) SnCH _# 3 2 \ / 0 C-0 (6) (where R6 is a C1-4 alkyl group such as n-butyl) or a zinc containing reagent of formula (7) 1 (CH 2) R2 p UnCH,_ \ / 0 (7) (where A is a halogen atom, e.g. bromine) in the presence of transition metal catalyst such as (Ph3P)4Pd, or a pre-reduced nickel acetylacetonate -Ph3P complex in a suitable solvent-such as an ether (e.g. tetrahydrofuran)g E(CH,)2N33P0 or a mixture of these. at a is suitable temperaturey preferably ambient temperature.

The organometallic reagents used in the above processes are either known compounds or may be prepared by analogous methods to those used for the preparation of the known compounds. Where suitable the group R2 may be protected, eg before the preparation of the organometallic reagents (6) and (7).

i i In a further procesd (B) the compounds of formula (1) in which 1 R1 is a hydrogen atom and A is zero may be prepared by reacting a boronic acid derivative of formula (8) # &--- B(OW2 0Alk-o O(CH2) X(CH2) C02H i i 1 (8) i 1 \ 0 j 1 1 n m 1 1 i i 3b Y 1 1 with a halobenzene of formula (9) i i 1.

i 1 1 R'(CH2) p IL-0 % (9) (where A is a halogen atom, e.g. bromine) under the conditions described in process (A) above for the reaction between a compound of formula (2) in which A is a halogen atom. e.g. bromine. and a compound of formula (3) in which X is a group -B(OH)2' The intermediates of formula (8) may be prepared by reaction of halobenzenes of formula (2) where R1 is a hydrogen atom with an organolithium reagent such as n-butyl lithium in a solvent such as an ether (e.g. tetrahydrofuran) at low temperature (e.g 100 to -7000 and a boron reagent-such as tri-isopropylborate.

The above conditions may yield the desired boronic acid or the corresponding boronic acid anhydride. If the anhydride is prepared then this compound may be used in the coupling reaction; the corresponding boronic acid may then be formed in situ under the conditions of the coupling reaction.

The intermediates of formula (9) are either known compounds or may be prepared by methods used for the preparation of the known compounds of formula (9).

In another process (C) compounds of formula (1) in which X is -CH=CH- may be prepared by reacting a compound of formula (10) 0Alk-o 0 O(CH2) CHO 0 i1 1 C- 1k Y ---(CH 2) R 2 # p (CH2) (10) with an appropriate Wittig reagent, eg a phosphorane of formula R 7 3P=CH(CH2)MC020 (where R7 is C1-6 alkyl or aryl, eq. monocyclic is 16 - aryl such as phenyl) or a salt thereof, eg. the potassium salt. Suitable reaction solvents include hydrocarbons (eg. benzene and toluene)q ethers (eg. tetrahydrofuran) and dialkylsulphoxides (eg. dimethylsulphoxide). The reaction may be carried out at any suitable temperature from -700 to 500C, preferably at room temperature. The reaction is particularly suitable for the preparation of compounds in which R1 is a hydrogen atom.

In a further process (D) compounds of formula (1) may be prepared by alkylation of an alkoxide (eg an alkali metal alkoxide) derived 10 from an alcohol of formula (11)- (CH2)-\ 0Alk-w - _0 H 0 1 1 Y (CH 2) p2 # p (11) with an alkylating agent L(CH2W(M2)mCO2R8 (where L is a leaving group such as a halogen atom eg. chlorine bromine or iodine, or a hydrocarbylsulphonyloxy group, eg methanesulphonyloxy or ptoluenesulphonyloxy and R8 is a methyl group or preferably a suitable acid protecting group eq. tertiary butyl). Suitable bases for the preparation of the alkoxide include for example sodiem hydride. The alkoxide may be formed in a solvent (eg a substituted amide such as dimethylformamide) at a suitable temperature from ambient to 1000C. The alkylating agent is then added to the cooled (eg. 000 solution of the alkoxide. The protecting group may be removed by hydrolysis for example as described in process (E) below.

The alkylating agents L(CH2)nX(CH2)mCO2R8 are either known compounds or may be prepared by methods analogous to those used for the preparation of the known compounds.

Intermediates of formula (11) may be prepared from compounds of formula (12) i i i i j 1 1 i 1 i i 1 i i i 1 0Alk-o OH C- >011 0 0 ly A (12) (where A is as defined previously) according to the method of process (A) above.

Intermediates of formula (2) may also be prepared from intermediates of formula (12) according to the method of process (D) above.

Intermediates of formula (10) may be prepared by reacting an acetal of formula (13) A # 0Alk-e O(CH2) CH(O0)2 _r n vy (13) (where R9 is a C1-4 alkyl, eg methyl, group or CH(OR9)2 forms a 1,3- dioxolane or 1,3-dioxane ring and A is as defined previously) according to the method of process (A) above, followed by hydrolysis to give the aldehydes (10) for example using hydrochloric acid in a suitable solvent (eg. acetone).

The intermediate acetals of formula (13) may be prepared by alkylation of a corresponding alcohols of formula (12) using an alkylating agent L(CH2)nCH(OR9)2under the conditions previously described in process (D) above.

The intermediate alcohols of formula (12) may be prepared from the epoxyethers of formula (14) or (15) - 18 0Alk-e 0 Oil 0-0 1,k \--- 0 A 0Alk-e 0 A i (14) (15) 0 1 1:"0 0-0, 1 by reaction with an amine YH in the absence or presence of a solvent eg. butanol at suitable temperatures up to reflux.

The epoxy-ethers of formula (14) may be prepared by epoxidation of ethers of formula (16) i A Alk-o /0 1 i i i 1 i i is (16) using a per-acid such as m-chloroperbenzoic acid in a solvent such as 1 1 dichloromethene.

The ethers of formula (16) may be obtained by alkylation involving (i) an alcohol of formula (17) and a compound _--- A 1Alk-o 1 0 (where L is as previously defined) or (ii) a compound of formula (18) and an alcohol A H0Alk-/ i 1 1 i 1 OH 4 0 0 1 11 1 0 1 \ 0 0 1 11 (where L is as previously defined) i l (17) (18) The alkylation reaction may be carried out in the presence of a base (eg. sodium hydroxide) and a quaternary alkyl ammonium salt eg.

1 - 19 tetrabutylammonium hydrogensulphate, or under the conditions described in process (D) above.

The epoxy-ethers of formula (15) may be prepared by alkylation of the alcohol (19) OH (19) A with a compound LA1k- is (where 1 is as previouslydefined) under the conditions described just above.

The intermediates of formulae (17), (18) and (19) are either known compounds or may be prepared by methods analogous to those used for the preparation of the known compounds of formulae (17), (18) and (19).

Processes (E)-(H) below describe methods for the preparation of compounds of formula (1) by interconversion or simple derivatisation.

(E) Compounds of formula (1) containing a group -COOH may be prepared by hydrolysis of a corresponding ester (eg. a Cl-6 alkyl ester such as a methyl or t-butyl ester) for example using a base such as sodium hydroxide or potassium hydroxide in a suitable solvent (eg. an alcohol such as methanol or ethanol) at a suitable temperature up to reflux.

(F) Compounds in which R1 is a methyl group may be prepared by esterification of the corresponding carboxylic acid. Conventional esterification techniques may be used, for example by reaction with methanol in the presence of a mineral acid such as hydrochloric acid or sulphuric acid.

(G) Compounds of formula (1) in which X is trans -CH=CH- may be prepared by isomerising the corresponding cis compound. The isomerisation may for example by effected by treatment with p-toluenesulphinic acid in dioxan (eg. at reflux) or azobisiso- 1 - 20 butyronitrile and thiophenol, using for example a hydrocarbon solvent (eg benzene) and any suitable temperature up to reflux.

(H) Compounds of formula (1) in which X is a -CH2CH2- group may be prepared by reduction of the corresponding compound in which X is a cis or trans -CH=CH- group. Suitable methods of reduction include hydrogen in the presence of a suitable catalyst such as palladium on a support (eg. carbon). Suitable solvents include alcohols (e.g. methanol or ethenol) and esters (e.g. ethyl acetate).

(I) Where salts of compounds of formula (1) are desired such salts may be formed in conventional methods) for example by treatment with an acid or with a base. Salt formation may be effected, for example, in a suitable solvent such as an ether (e.g. diethylether), a nitrile (e. g. acetonitrile), a ketone (e.g. acetone). a halogenated hydrocarbon (e.g. c61oroform or dichloromethane), an ester (e.g. ethyl acetate or isopropyl acetate) or an alcohol (e.g. methanol, ethanol or isopropanol). Salts may also formed by.conversion of one salt of a compound of the invention into another, eg. by ion exchange using conventional methods.

Intermediate compounds of formulae (12)g (13), (14), (15) or (16) may be converted to the corresponding intermediates containing the group 1 (CH 2) p R 2 1 by the methods of process (A) above or via intermediate boronic acids by the method of process (B) above.

Intermediates of formulae (2), (2a), (8)g (10)g (11)g (12)g (13), (14)g (15) and (16) and the anhydride precursors of the boronic acids of formula (8) are novel compounds and form a further aspect of the present invention. The compounds of formulae (2) and (8) and the corresponding aforementioned anhydrides are particularly useful intermediates.

When a specific enantiomer of formula (1) is required, starting materials having the desired stereachemical configuration should be used in the above processes. For example, individual enantiomers of i i i i i 1 1 1 i i 1 i 1 1 i 1 i - 21 the alcohol of formula (17) may be obtained from the corresponding racemic alcohol, using methods such as those described by V.S. Martin et. al. in J. Amer. Chem. Soc., 1981, 103t 6237. Alternatively, the enantiomers of an alcohol of formula (12) may be prepared from the corresponding racemic alcohol using for example a suitable chiral resolving agent such as resolved 1-(1-nephthyl)ethylisocyanate as described by W. H. Pirkle and M. S. Hoekstra in J. Org. Chem., 1974, 399 3904.

Cyclodextrin complexes of compounds of formula (1) may be prepared from a compound of formula (1) or a salt (e.g. the hydrochloride salt) thereof by dissolving the compound of formula (1) or a salt thereof in water or an organic solvent which is miscible with water (e.g. an alcohol such as methanol) and adding to the solution a solution of a-g p- or ycyclodextrin (or a hydrate thereof) or a mixture of two or three of them together in water and/or an organic solvent which is miscible with water. The reaction may conveniently take place at any temperature in the range from 00 to 800C. Howeverg the mixture is preferably kept at room temperature and the desired complex obtained by concentrating the mixture under reduced pressure or by allowing the mixture to cool.

The following examples illustrate the invention. Temperatures are in OC. Flash column chromatography (F.C.C.) and thin layer chromatography (t.i.c. ) were carried out using the following systems; A) Silica.

B) Triethylemine deactivated silica.

Dried refers to drying with M9SO..

NaH refers to a dispersion of sodium hydride in oil.

The following abbreviations are used.

EA - ethyl acetate ER - diethyl ether DMF - dimethylformamide THF tetrahydrofuran PE - petroleum ether (b.p. 40-600) NH3 - 0.880 ammonia DCM - dichloromethene UP - tetrakis(triphenylphosphine)palladium (0) Intermediate 1 1,1-Dimethylethyl 2-bromobenzeneacetate A mixture of 2-bromophenylacetic acid (5.02g), N,N-dicyclo- hexylcarbodiimide (5.39), 4-pyrrolidinopyridine (0.49) and t-butanol (1.749) in DCM (120m1) was stirred at room temperature, under nitrogen, for 4h. The mixture was left to stand for 18h, then ER (150mX) was added and the mixture was filtered and washed with ER.

The filtrate was evaporated in vacua to leave a yellow suspension.

F.C.C. (A) eluting with hexene gave a white semisolid, which was further chromatographed eluting with hexane, then 1% ER in hexane, and finally 2% gave a colourless liquid. Vacuum distillation by Kugelrohr at 0AmmHg and at 140-1500 gave the title compound as a colourless oil (0.559). T.l.c. (A) hexene:ER (3:1) Rf 0.68.

Intermediate 2 [2-E(Methylsulpho!iyl)methyllphenyllboronic acid A solution in DMF (2.0m1) of 12-(bromamethyl)phenyllboronic acid (399m9) was added in one portion to a stirred slurry of sodium methenesulphinate (200mg) in DMF (2.0mt). The mixture was stirred for 1 1 i 1 i 1 i 1 1 1 i 1 i i j 1 1 i - 23 2.5h and then poured into 1M hydrochloric acid (10Omú) and extracted with EA (3x5Oml). The combined extracts were dried and evaporated. On standing a solid material precipitated, which was washed with ER to give white crystals of the title compound (115mg) m.p. 133-1370. T.l.c. (A) ER:hexane (3:2) Rf 0.51.

Intermediate 3 Sodium 2-bromobenzenemethanesulphonate 2-Bromobenzyl bromide (109) was added to a warm (400 internal). 10 vigorously stirred, partial solution of sodium sulphite (5.05g) in water (15m.Q. The temperature was raised to 800 over 1h and kept at that temperature for 3h. Ethanol (15mX) was added and the mixture slowly cooled to room temperature. The solid was filtered off, washed with aqueous ethanol (1:1; 5m1) and ER (3x20m1) and dried in vacuo to give the title compound (8. 779) as white plates, m.p. 286-80 (dec).

Intermediate 4 2-Bromo-N-methylbenzenemethanesulphonamide A mixture of Intermediate 3 (1.59), phosphoryl chloride (1.79), DMF (0.25m.C and DCM (10mú) was stirred under reflux for 23h.

The cooled reaction mixture was added, over 5 min, to a vigorously stirred mixture of ice and water (50m1). After 45 min, the separated aqueous layer was extracted.with DCM (15m1). The combined DCM solutions were washed with water (20m1) then added, over 30 min, to vigorously stirred, ice cooled aqueous methylamine (20mi of 40% aqueous solution + 1Omú water). After 1h, the mixture was diluted with water (25mk) and the aqueous layer extracted with DCM (2x20mú).

The dried extracts were evaporated in vacuo to leave a colourless oil, which crystallised on standing. Crystallisation from EA-hexane gave the title compound (0.6g) as white crystals, m.p. 72.5-740. T.l.c.

(A) ER Rf 0.46.

Intermediate 5 W-1.1-Dimethylethyl 6-chloro-4-hexenoate n-Butyl lithium (1.6M; 6m1) was added,over 5 min, under nitrogen, to a stirred, cooled (100) solution of cyclohexyl isopropyl amine (1.64m1) in dry THF (10m1). After 5min the solution was cooled to -780 and after a further 15min., t-butyl acetate (1.35m1) was added 1 1 i i i i over 5min. After 20min.g cis-1,4-dichloro-2-butene (4m1) was added and the mixture allowed to warm to 100 over 4h. The mixture was diluted with hydrochloric acid (1N; 25m1) and extracted with ER (2x3Oml). The extracts were washed with hydrochloric acid (1N; 20M1)p brine (20m1) and sodium bicarbonate (8%; 20m1), dried and evaporated in vacuo to leave a pale yellow oil. The excess dichlorobutene was removed on the Kugelrohr (900113mm) to leave a yellow oil.

F.C.C. (A) eluting with light petroleum (40-600), increasing to DCM in petrol and finally DCM, gave the title compound (0.66g) as a colourless liquid.. T.l.c. (A) DCM Rf 0.48.

Intermediate 6 ( )-1-Bromo-4-[[(2-cyclopenten-l-yl)oxylpropyllbenzene 4Bromobenzenepropanoll (0.93g) was dissolved in dry DMF (4mi) is and treated with sodium hydride (460mg, 80%). The mixture was, after complete reaction, cooled to 00 and 3-chloro-l-cyclopentene (1.5m1) was added slowly dropwise, with stirring. The mixture was stirred at 00 for 1h and then left to stand overnight. A mixture of brine (25mú) and 20% potassium carbonate solution (25m1) was added and the product was extracted with EA (3 x 30m1). The combined extracts were dried and evaporated to give an orange oil. F.C.C. (A) eluting with hexane:ER (19:1) gave the title compound (406m9) as a pale yellow oil. T.l.c. (A) hexene-ER (19:1) Rf 0.27.

1. K. Hanada et. al., Jpn. Kokai Tokyo Koho 79, 141, 735 Nov. 1979.

Intermediate 7 ( )-1-Bromo-4-[[(2-eyclopenten-l-yl)oxylmethyllbenzene A mixture of the 2-eyclopenten-1-012 (69), tetrabutylammonium hydrogensulphate (19), 4-bromobenzyl bromide (23g) in DCM (100mi) and 70% sodium hydroxide solution (40mC was stirred at 200 for 3 days. A further quantity (7.5g) of the bromide was added and stirring continued for a further 24h. The inixture was diluted with water and DCM and the layers were separated. The aqueous layer was extracted with DCM and the organic extracts were washed with water, dried and evaporated to give an oil which was purified by F.C.C. (A) eluting initially with PE i i i i 1 1 i 1 1 1 f 1 1 i 1 i i i i - 25 then with 19:1 PE-ER to give the title compound as a pale-yellow oil (14.19). Analysis Found: C,56.7; H,S.O. C12H13BrO requires C,56.9; H5.2%. 2. J. L. Eisch et. al., J. Org. Chem. 44, 587 (1979) In a similar manner was prepared Intermediate 8.

Intermediate 8 (la2p,5a)-( )-2-1(4-Bromophenyl)methoxy]-6-exabicyclo[3.1.Olhexane (6.939). Analysis Found: C953.9; H25.0. C12H,PrO requires C,53.55; H,4.9%. From (la,2p,5a)-6-oxabicyclo[3.1.Olhexan-2-ol (39), 4-bromobenzy1bromide (99), tetrabutylammonium hydrogensulphate (0.39)., DCM (60m1) and 70% w/v sodium hydroxide solution except that F.C.C. (A) was carried out using PE then ER-PE (1:1) as eluent Intermediate 9 ( )-1-Bromo-3-[[2-(cyclopenten-l-yl)oxylmethyllbenzene A solution of 2-cyclopenten-l-ol (8.79),.3-bromobenzylbromide (25.89) and tetrabutylammonium hydrogensulphate (3.7g) in toluene (150mC were treated with 17M sodium hydroxide (75m.C and stirred vigorously for 4.5h, then treated with water (150m.Q. The toluene layer was separated and the aqueous layer extracted with ER (3x50m.C.

The combined organic phases were dried and evaporated to give a yellow oil. F.C.C. (A) eluting with hexane then hexane:ER (9:1) to give the title compound as a colourless oil (18.39). T.l.c. (A) hexane Rf 0.16.

Intermediate 10 (1a92a,5a)-( )-2-[(4-Bromophenyl)methoxy]-6-oxabicyclo[3. 1.0]hexane m-Chloroperbenzoic acid (85%, 13.49) was added over 1.5h to a cold (00) stirred solution of Intermediate 7 in DCM (200mX). The mixture was stirred at ambient temperature for 16h, filtered and the filtrate washed with a solution of potassium carbonate (150g) and sodium sulphite (509) in water (50Omú). The aqueous layer was extracted with DCM and the combined organic extracts were dried and evaporated. The residue was purified by F.C.C. (A) using PE-ER (3:1) as eluent to give the title compound as an oil (5.64g).

Analysis Found: C953.32; H94.83.

C12H13M2 requires C,53.55; H,437%.

In a similar manner were prepared Intermediates 11 and 12.

Intermediate 11 (la,2&-,5a)-( )-2-1(3-Bromophenyl)methoxy]-6-oxabicyclo[3. 1.01hexane (14.3g). T.l.c. (A) hexane:ER (3:1) Rf 0.39.

is From m-chloroperbenzoic acid (32.0g) and Intermediate 9 (239) except that, after washing, the mixture was evaporated to give a colourless oil which was purified by F.C.C. (A) eluting with hexane, then hexane:ER mixtures (19:1), (9:1) and (4:1).

Intermediate 12 (la,2ck?,5a)-( )-2-E3-(4-Bromophenyl)propoxy]-6oxabicyclo[3.1.Olhexene (1.479). T.l.c. (A) hexaneiEA (9:1) Rf 0.36 and 0. 40.

From Intermediate 6 (5.8g) and m-chloroperbenzoic acid (8.6g) except that. after washing, the mixture was evaporated to leave a pale 25 yellow oil which was purified by F.C.C. (A) eluting with hexene:EA (9:1), (18:3), and finally (4:1).

Intermediate 13 (la,20,50)-( )-2-[(4-Bromophenyl)methoxy]-5-(hexahydro1Hazepin-l30 yl) cyclopentan-l-al A solution of Intermediate 10 (5.439) and hexamethyleneimine (25mú) in butan-l-ol (75mú) were heated at reflux for 22.5h.

Evaporation of the solvent and excess hexamethyleneimine in vacuo gave a residue which was purified by F.C.C. (B) with EA:methanol (9:1) as the eluent to give the title compound as a pale brown oil (6.69).

Analysis Found: C59.0; H173;- N94.15.

CAH26BrNO2 requires C,58.7; H,7.1; N,33%.

-1 1 In a similar manner were prepared Intermediates 14-18.

Intermediate 14 [1a92a25p]-( )-2-[(4-Bromopb2n 11)methoxy]-5-(hexahydro-1H-azepin-l- y1)cXclopentan-1-01 (13.76g). T.l.c. (B) methanol:EA (1:10) Rf 0.4.

From Intermediate 8 (11.35m9) and hexamethyleneimine (14.5m1) in butan-lol (65m1) except that F.C.C. (B) was carried out with methanol:EA (1:20) as cluent.

Intermediate 15 Ela,2p,5p]-( )-2-[(4-Bromophenyl)methoxyl-S-(4-morpholinyl)-1cyclopentanal (5.069), m.p. 86-880. T.l.c. (A) EA Rf 0.1.

From Intermediate 10 (10.019) and morpholine (19m1) in butan-1-01 (60m1) except that F.C.C. (B) was carried out with 3% methanol in EA is as eluent.

Intermediate 16 lla,2p,501-( )-12-[(4-Bromophenyl)methoxy]-5-(1-piperidinyl)]-lcyclopentanol (13.16g). T.l.c. (B) EA:methanol (9:1) Rf 0.35.

From Intermediate 10 (109) and piperidine (35m1) in buten-l-ol (60mú) except that F.C.C. (A) was used eluting with 3% methanol in EAY followed by 3% methanol and 0.5% triethylamine in EA, then 5% methanol and 0.5% triethylamine in EA.

Analysis Found C7573; H790; N4.0.

C17H24BrNO2 requires C,57.6; H163; Nt4.0%.

Intermediate 17 (la,2p,50)( )-2-1(3-Bromophenyl)methoxy]-5-(hexahydro-1H-azepin-l-yl)cyclopentan-l-ol (16.89). T.l.c. (B) hexane:ER (1:1) Rf 0.06.

Analysis Found: C,58.45; H,7.2; N,4.0.

C18H26BrNO2 requires C,58.7; H7.1; Ny3.8%.

From Intermediate 11 (12.25g) and hexamethyleneimine (50mi) in butan-l-ol (50mC except that F.C.C. (B) was carried out with EA then EA:methanol (19:1) as eluent.

Intermediate 18 (la,20950)-( )-2-[3-(4-Bromophenyl)propoxy]-5-(1-piperidinyl) cyclopentan-l-ol (1.55g). T.l.c. (B) EA:methanol (9:1) Rf 0.5.

From Intermediate 12 (1.45g) and piperidine (5m1) in butan-l-ol (10mX), except that F.C.C. (B) was carried out with EA:methanol (19:1) and then EA:methanol:triethylamine (94:5:1) as eluent.

Intermediate 19 lla,(Z),20,5p]-( )-1,1 -Dimethylethyl 6-[[2-[(4bromophenyl)methox-yl- 5-(he 1 xahydro-1H-azepin-l-yl)cyd'lopentyl]ox-Y1-4-hexenoate Sodium hydride (80%,0.11g) was added under nitrogen to a solution of Intermediate 13 (0.85g) in dry DMF (8.5m1). The mixture was heated at 700 until evolution of hydrogen had ceased. The suspension was cooled (00) and Intermediate 5 (0.76g) was added dropwise. The mixture was stirred at 200 for 4.5h poured into brine and extracted with ER. The organic extracts were dried, filtered and evaporated to give an orange oil. F.C.C. (B) with ER a eluent gave the title compound as a yellow-brown oil (0.52g).

Analysis Found C962.5; H97.9. N92.65.

p C28H42BrNO4 requires C,62.7; H97.9; N2.6%.

In a similar manner were prepared Intermediates 20-24.

Intermediate 20 Ela(Z),2a,501-( )-1,1 -Dimethylethyl 6-[[2-[(4-bromophenyl)methoxy]-5(hexahydro-1H-azepin-l-yl)cyclopentylloxy]-4-hexenoate (5.90 ).

Analysis Found: C62.8; H,M; N92.8.

C20.2BrNO, requires C962.7; H97.9; N,2.6%.

From sodium hydride (80%, 2.639), Intermediate 5 (8.59) and Dhtermediate 14 (13.7g) in dry DMF (40m1) except that F.C.C. (B) was carried out with ER:hexane (1:1) as eluent.

Intermediate 21 [la(Z),2p,5p]-( )-1,1-Dimethylethyl 6-[[2-[(4-bromophenyl)methoxy]-5(4morpholinyl)cyclopentylloxy]-4-hexenoate (10.669). T.l.c. (B) ER Rf 0.34.

i i i 1 1 i 1 i 1 i i i 1 i i i 1 i - 29 Analysis Found: Cp59.5;H17.5;Nt23. C26H38BrNO5 requires C,59.5;H,73; N92.7%.

From sodium hydride (80%. 1.78g). Intermediate 5 (11g) and Intermediate 15 (12.58g) in dry DMF (80mi) except that Intermediate 5 was added rapidly and then the mixture was stirred at 00 for 10ming then the cooling bath was removed, and stirring was continued for 2.5h. Water (20m.C.was added dropwise, and the resulting mixture was poured onto more water (500m1) and extracted with EA (3x150m1). The combined organic extracts were washed with water (500mi) and brine (250mX). and then dried, and evap 1 orated in vacuo to leave a brown oil. Finally, the oil was purified by F.C.C. eluting with ER:hexene (1:2) then (2:1) then ER.

Intermediate 22 [la(Z),20,501--( )-1,1-Dimethylethyl-6-[[2-[(4bromophenyl)methoxy]-5(1-piperidinyl)cyclopentylloxy]-4-hexenoste (5.29). T.l.c. (B) ER 0.67.

From sodium hydride (80%p 1.57g), Intermediate 5 (10g) and Intermediate 16 (10.869) in dry DMF (70m1) except that the work-up 20 procedure was as described in Intermediate 21 above using F.C.C. (B) eluting with hexene:ER (3:1), then (2:1) and finally (1:1).

Intermediate 23 Ela(Z),20,5p]-( )-1,1-Dimethylethyl 6-[[2-[3-(4-bromophenyl)propoxy]-5-(1-piperidinyl)cyclopentyl]OXYI-4-hexenoete (1.179). T.l.c. (B) hexane:EA (2:1) Rf 0.25.

From sodium hydride (380%, 80%), Intermediate 5 (1.69) and Intermediate 18 (1.53g) in dry DMF (7.0mú) except that the work-up procedure was as described in Intermediate 21 above using F.C.C. (B) eluting with hexene:EA (9:1), (5:1) and finally (4:1).

intermediate 24 [la(Z)9209501-( )-11,1-Dimethylethyl 6-[[2-[(3-bromophenxl)methoxy] 5-(hexahydro-1H-azepin-l-yl)cyclopentyllon]-4-hexenoate (11.49).

T.l.c. (B) hexane:EA (2:1) Rf 0.37.

- From sodium hydride (80%, 4.39), Intermediate 5 (20m1) and Intermediate 17 (16.89) in DMF (75m1) except that the work-up - 30 procedure was as described in Intermediate 21 above using F.C.C. (B) eluting with hexane:EA (2:1).

Intermediate 25 [la,(Z),2f,501-( )-6-[[2-1(4-Bromophenyl)methoxy]-5-(hexahydro1H-azepin-l-yl)cyclopentylloxy]-4-hexenoic acid A solution of Intermediate 19 (0.409) in ethanol (9m.0 was stirred with 2M sodium hydroxide solution (4mú) and the resulting mixture heated under reflux for 2.5h. The mixture was poured into pH 6.5 phosphate buffer (SOmú) and extracted with DCM. The organic extracts were dried, filtered and evaporated to give a pale yellow oil which was purified by F.C.C. (B) using triethylemine:methenol:EA (2:15:83) as eluent gave the title compound as a yellow oil (260M9). T.l. c. (A) W3:ethanoLDCM (4:25:71) Rf 0.43 is In a similar manner were prepared Intermediates 26-30.

Intermediate 26 Ela(Z),2a,5g]-6-[[2-(4-Bramophenyl)methoxy]-5-(hexahydro-1H-azepin-lyl)cyclopentylloxy]-4-hexenoic acid (5.099) T.l.c. (A) DCM:ethanol:NH3 (75:20:5) Rf 0.33.

From Intermediate 20 (5.859) and 2N sodium hydroxide (25m1) in ethanol (5m1) except that the purificatiQn step was not required.

Intermediate 27 Ela(Z)2p,5p]-( )-6-[[2-[(4-Bromophenyl)methoxy]-5-(4-morpholinyl) cyclopentylloxy]-4-hexenoic acid (9.29g), m.p. 99-1000. T.l.c. (A) DCM:ethenol:NH3 (14:5:1) Rf 0.24.

From Intermediate 21 (10.599) and sodium hydroxide (2M, 50m1) in ethanol (100m1) except that work-up was carried out by evaporating the mixture ' in vacuo and then pouring the mixture onto a mixture of pH 6.5 phosphate buffer (100m1) and hydrochloric acid (2M; 50m1), followed by extraction with DCM (3x5OmX). The combined organic extracts were dried and evaporated in vacuo to leave a brown oil which was purified by F.C.C. (A) eluting with DCM:ethanol:NH3 (72:25:3).

- 31 Intermediate 28 [la(Z) t20 p 501-( )-6-[[2-[ (4-Bromophenyl)methoxy-5-(1-piperis!i 9úClopentylloxy]-4-hexenoic acid (6.539). T.l.c. (A) DCM:ethenol:NH3 (14:5:1) Rf 0.35.

From Intermediate 22 (7.539) and sodium hydroxide (2M, 40m1) in ethanol (80m1) except that the work-up procedure was as described in Intermediate 27 above although the chromatography step was not required.

is Intermediate 29 [la(Z),2p,5p]-( )-6-[[2-E3-(4-Bromophenyl)propoxy]-5-(1piperidinyl)cyclopentylloxy]-4-hexenoic acid (1.039). T.l.c. (A) DCM:ethenol:NH3 (75:25:3.5) Rf 0.29.

From Intermediate 23 (1.159) and sodium hydroxide (2M, 6m1) in ethanol (12m1) except that work-up was carried out by treating the mixture with hydrochloric acid (2M, 6m1), followed by pH 6.5 phosphate buffer (150mú). The combined organic extracts were dried and evaporated.

Intermediate 30 [la(Z)2209501-( )-6-[[2-[(3-Bromophenyl)methoxy]-5-(hexahydro-1Hazepin-l-yl)cyclopentylloxy]-4-hexenoic acid (10.09). T.I.c. (A) DCM:ethenol:NH3 (80:20:2) Rf 0.35.

From Intermediate 24 (11.49) and sodium hydroxide (2M, 50m1) in ethanol (100m1) except that work-up was carried out by evaporating the mixture in vacuo and the aqueous residue was treated with hydrochloric acid (2M, 50m1) and pH 6.5 phosphate buffer (500m1) and then extracted with EA (4x150m1), washed with brine (200m.0, dried and evaporated.

Intermediate 31 [la(Z),2p,5p]-( )-6-E[2-[(4-Boranophenyl)methoxy]-5-(hexahydro-1Hazepin-l-yl)cyclopentylloxy]-4-hexenoic acid, bimolecular monoenhydride n-Butyl lithium (1.6% 3m1) was added, over 10 min, under nitrogen, to a cooled (-780) solution of Intermediate 25 (0.4759) in i dry THF (30mX). After a further 12 min, triisopropyl borate (5mt) was added over 30 sec. After a further 20 min, the cooling bath was removed and the mixture stirred for 2.5h. Water (Sml) was added and the solvent removed in vacuo to give a residue which was purified by F.C.C. (A), eluting with DCM:ethanol3 (90:60:12) to give a solid which was evaporated with water (1m.0 to give the title compound as a solid (0.122g).

Analysis Found: C265.95; H28.3; N23.5.

C.SH70B2N2011 requires C,66.1; H28.1; N,3.2%.

Intermediate 32 Ela(Z),2a,5p]-( )-6-1[2-[(4-Boronophenyl)methoxy]-5-(hexahydro-1Hezepin-l-yl)cyclopent_vlloxy]-4-hexenoic acid n-Butyllithium (1.31M; 30mX) was added dropwise over 20 min (keeping internal temperature <-950) under nitrogen to a stirred solution of Intermediate 26 (29) and triisopropylborate (19m1) in dry THF (100m1). After stirring at -1000 for 10 min, the mixture was allowed to warm to room temperature over 3h. Methanol (50m1) and then water (15mC were added dropwise. The mixture was evaporated in vacuo to leave a grey solid. F.C.C. (A) eluting with DCM:ethanol3 (70:20:5) then DCM:ethenol:methanol:NH3 (5:2:2:1) gave the title compound as a cream foam.

T.l.c. (A) DCM:ethanol:methenol:NH3 (5:2:2:1) Rf 0.41.

Intermediate 33 [4-[[(1,1-Dimethylethyl)dimethylsilylloxylphenyllboronic acid, bimolecular monoanhydride n-Butyl lithium (1.6M; 9.7mú) was added, over 8 min. under nitrogen, to a stirred, cooled (<-700) solution of 1-bromo-4-[[(1,1 dimethylethyl)dimethylsilylloxylbenzene (49) in dry THF (40mX). After a further 25 min, the resulting solution was added over 10 min.

(keeping internal temp. <-660) to a stirred cooled solution or tri-isopropyl borate (10m1) in THF (40mi). The cooling bath was then removed and the mixture stirred for.2h. Water (10m.C and, after a further 5 min, pH 6.5 phosphate buffer (100mk) and ER (50m.Q were added and the mixture stirred vigorously for 10 min. The aqueous layer was extracted with ER (2x7OmX) and the combined organic 1 1 1 i i 1 1 i i i solutions dried and evaporated in vacuo to leave a white solid. Crystallisation from ER gave the title compound (2.02g) as a white solid, m.p. 193-70.

Example 1(a) Ela(Z),213,Sffil-( )-6-[[2-(Hexahydro-1H-azepin-l-yl)-5-[[2!(hydroxy- methyIL1,11-b:LphenyJI-4-ylJmethoxyjcyclopentyljoxyj-4-hexenoic acid A mixtue of the Intermediate 25 (0.195g), 1,3-dihydro-lhydroxy-2,1benzoxaborole (0.1359), UP (0.0189), aqueous 1M sodium carbonate (2.5m.C and 1,2-dimethoxyethane (6.5mi) was stirred and heated at reflux under nitrogen for 3h. 2N Sulphuric acid (1.5m.Q and pH 6.5 phosphate buffer (40m1) were added to the cooled mixture which was extracted with DCM. The organic extracts were dried and evaporated. F.C.C. (A) eluting with DCM:ethanol:NH3 (86:16:2) gave a is cream coloured foam which was dissolved in 0.5N sulphuric acid and washed with ER. The aqueous layer was neutralised with 5N sodium hydroxide, pH6.5 phosphate buffer added and the product was extracted into DCM. Evaporation of the dried organic extract gave the title compound ' (0.1959) as a pale cream foam. I.r. (CHBr3) 760, 830, 20 1600(br), 1700(br), 3595cm-1. T.l.c. (A) (82:16:2) DCM:ethanol:NH3 Rf 0.19.

The following compounds were prepared by the same method from a suitable bromo intermediate and a boron reagent:

(b) [la(Z)9 20,5p]-( )-6-[[2-(Hexehydro-1Hazepir-1=,l)-5-[[41(hydroxyrn. ethy[1,11-biphenyll-4-yllmethoxylcyclopentylloxy]-4- hexenoic acid. T.l.c. (A) DCM:ethenol:NH3 (39:1Otl) Rf 0.24.

Analysis Found:

C31H.1NO5 requires C973.2; HB.2; Ny2J.

C1733; H,8.1; N,2.81-01 (c) [la(Z),2p,5p]-( )-6-[[2-(Hexahydro-JH-azepin-l-yl)-5-[[31(hydroxyrnethyl)rlll-biphenyll-4-yllmethoxy]cXclo2entylloxy]-4- hexenoic acid. I.r. (CHBr 3) 788 8301 1600, 1705(br) cffrl.T.l.c.

(A) DCM:ethanol:NH3 (67:30:3) Rf 0.18.

- 34 (d) Ela(Z),2,5P]-( )-6-112-(Hexahydro-1H-azepin-l-yl)-5[(41hydroxy[1,11-biphenyll-4-yl)methoxylcyclopentylloxy]-4-hexenoic acid. I.r. (Nujol) 815, 1560, 1712 (br), 3700 (br) cm-1. T.l.c. (A) DCM:ethanol:NH3 (82:16:2) Rf 0.17 (e) Ela,20(Z),3a]-( )-4'-[[[2-[(5-Carboxy-2-penten-l-yl)oxy]-3(hexahydro1H-azepin-l-yl)cyclopentylloxylmethyll-1,11-biphenyl-3carboxylic acid. I. r. (Nujol) 768, 15629 1710, 3700 (br) cnrl. T.l.c. (A) DCM:ethenol:methenol:NH3 (25:12:12:1) Rf 0.15 (f) [la(Z),2p,5p]-( )-6-1[2-(Hexahydro-1H-azepin-l-yl)-5-1(2'10 hydroxy[l, l-biphenyll-4-yl)methoxylcyclopent ylloxy]-4-hexenoic acid. M.p. 149-1510 Analysis C30H39NOb Found: C72.7; H17.9; N$2.6.

requires C,73.0; H98.0; Nv2.8',c.

(g) Ela(Z),20,5p]-( )-6-[[2-1[4'-(Aminocarbonyl)E1,11-biphenyll-4yllmethoxy]-5-(hexahydro-1H-azepin-l-yl)cyclopentylloxy]-4-hexenoic acid. I. r. (Nujol) 820, 1610, 1665, 1710 (sh) cffrl. T.l.c. (A) DCM:ethanol:NH3 (67:30:3) Rf 0.15 (h) Ela(Z),2p,5a]-( )-6-[[2-(Hexahydro-1H-azepin-l-yl)-5[[4l(hydroxymethyl)E1,1'-biphenyl]4-yllmethoxylcyclopentylloxy]-4hexenoic acid. T.l.c. (A) DCM:ethanol:NH3 (55:40:5) Rf 0.22. (CHBr,) 805, 1600(br), 1700, 3590cm-1.

(i) lla(Z),2P,51-6-( )-[[2-(Hexahydro-1H-azepin-l-yl)-5[[3'(XdroxymethXl)E1,11-biphenyll-4-yllmethoxylcyclopentylloxy]-4hexenoic acid I.r. (Nujol) 785, 830, 1710 (br), 3450 (br) cnrl. T.l.c. (A) DMethanol:NH3 (70:25:5) Rf 0.15 (j) Ela(Z),20,5a]-( )-6-[12-(Hexahydrc)-1H-azepin-l-yl)-5[[21(hydroxymethyl)[1,ll-biphenyll-4-yllmethoxylcyclopentyllaxy]4hexenoic acid. T.l.c. (A) DCM:ethanol3 (13:6:1) Rf 0.35. (CHBr3) 765, 1595, 1710, 3595cm-1.

1 w I.r.

4 - (k) lla(Z),20,501-( )-6-[[2-[[21-(Hydroxymethyl)C1,11-biphenyll-4yllmethoxyl-S-(4-morpholinyl)cyclopent_ylloxy]-4-hexenoic acid T.l.c. (A) DCM:ethenol:NH3 (14:5:1) Rf 0.27.

Analysis Found: C,68.3; H98.0; N92.9.

C29H37NO6 requires C70.3; H97.5; N92.8%.

C29H37NO6 (0.9mo1H20) C,68.1; H7.6; N,2.7%.

(1) [la(Z),2P,5p]-( )-6-[[2-[[21-(Hydroxymethyl)C1,11-biphenyll4-yl-methoxy]-5-(1-piperidinyl)cyclopentylloxy]-4-hexenoic acid.

T.l.c. (A) DCM:ethanol:NH3 (14:5:1) Rf 0.25. Analysis Found: C,72.7; H,8.1; N,2.7. C30H39NOS requires C,73.0; H08.0;

N92.8%.

(m)Ela(Z),20,501-( )-6-[[2-E3-[2L(,4ydroxymethyl) - '-biphenyll4-yllpropoxy]-5-(1-piperidinyl)cyclopentylloxy]-4-hexenoic acid.

T.l.c. (A) ethanol:DCM:NH3 (25:75:3) Rf 0.24. I.r. (CHBr3) 1730-1570 (br), 1065, 765cm-1.

(n) [la(Z),20,5p]-( )-6-[[2-Hexah_ydro-1H-azepin-l-yl)-5[[21(hydroxymethyl)Clgl'-biphenylj-3-yllmethoxyleyclopentylloxy]-4hexenoic acid. T.l.c. (A) DCM:ethanol:NH3 (25:8:1) Rf 0.26.

The gum (271mg) was dissolved in DCM (15m1) and washed with pH 6.5 phosphate buffer (20mt), then dried and evaporated to leave the title compound as a pale yellow foam (254mg).

Analysis Found: Ct72.2; H98.2; Nt2.6.

C31H41NO5 requires C,733; H8.1; N2.7',o.

(o) [la(Z),2p,Spl-( J-6-[[2-(Hexahydra-1H-azepin-l-yl)-5-[[2!-C(methylsulphonyl)methylj[1,11-biphenyll-4-yllmethoxyleyclopentylloxy]-4- hexenoic acid. T.l.c. (A) DChi:ethanol:NH3 (75:25:3.5) Rf 0.43.

Analysis Found: C66.3; H97.75; N,2.2.

C32H43NO6 S.O.58 H20 requires C,66.25; H97.6; N92.4%.

The following Table I is a summary of the reaction conditions used to prepare the products of Examples 1(b) to 1(o).

1 TABLE I

Ex. No. Intermediate used Boron reagent used Vol. of Vol. and Wt. of Reaction Work-up Yield (and weight) (and weight) solvent concentration UP (9) Time (h) procedure (9) (M1) of Ne 2M 3 lb 25 (0.2g) a (0.189) 5 2m1, 2N 0.015 4.5 A 0.193 lc 25 (0.1759) b (0.06g) 5 2m1, 2N 0.013 5' B 0.167 ld 25 (0.219) c (0.225g) 6 2.5m1, ZN 0.022 5 c 0.13 le)5 (0.2079)- d (0.149) a 3m1, 2N 0.022 6 D 0. i21 if -25 (0.33c) a (0.229) 10 5M1, 2N D.027 3 E 0.12 19 (0.2159) f (0.129) 8 3M1 1.11 0.021 4 F 0.162 1h e (0. 31-7 9', 1 N' 0.035 3.5 0 26 (0.4589) b (0.3199) 10 5m1, 2N 0.030 3 H MOP 26 _T lj (0.2g) 10 5r-1, 2N 0.026 3.5 1 C. 19 9) g,C - 20 5r.1, 0.02 0 569" 9 G.11-669) 1.0 5mi, 2% 0.026 3-- J - (0.17o) 0 (0.065g) 3 1.5r.1, '1M 0.020 33 C.

ln (0.34C (0.1356a) 5.5 2.75M1, 114 0.025 3 0.30 3C, 9 lo (0.172g) h (0.114g) 3 1.5m1, 1M D.G35 4.5 M 0-1-63 j 1 1 1 i 1 i 1 1 1 i i 1 i 1.

In column 3 of Table I above the boron reagents designated a-h are as follows a. 14-(hydroxymethyl)phenyllboronic acid b. 13(hydroxymethyl)phenyllboronic acid c. [4-[[(1,1-dimethylethyl)dimethylsilylloxylphenyllboronic acid, bimolecular monoanhydride d. 3-boronobenzoic acid e. (2-hydroxyphenyl)boronic acid f. [4- (aminocarbonyl)phenyllboronic acid g. 1,3-dihydro-l-hydroxy-2,1benzoxaborole h. [2-[(methylsulphonyl)methyllphenyllboronic acid.

In column 8 of Table I above the work-up procedures designated 15 A-M are as follows:

A. 2N sulphuric acid (lml) was added to the cooled solution, which was then diluted with pH 6.5 phosphate buffer (50m1) and extracted with DCM (4 x 20m1). Evaporation of the dried c ' xtract gave a yellow gum which was subjected to F.C.C. (A) eluting with DCM:ethanol:NH, (78:20:2).

B. As in A above except that the eluting system was initially DCM:ethanol:NH3 (78:20:2) and then DCM:ethenol:NH, (67:30:3).

C. As in A above except that extraction was carried out with EA 25 instead of DCM and the eluting system was as in B above.

D. The mixture was diluted with 0.5N sodium carbonate (35m1) and washed with ER (50m1). The aqueous layer was acidified (pH<1) with concentrated hydrochloric acid and extracted with DCM (6 x 25m1).

Evaporation of the dried extract gave a yellow gum which was subjected to F.C.C. (A) eluting with DCM:ethanol:NH, (67:30:3) then DCM:ethenol:methanol:NH, (47:25:25:3).

E. The mixture was poured onto phosphate buffer (pH 63; 75m1) containing 2N sulphuric acid (2.5m1) and extracted with DCM (5 x 30m1). The organic extracts were dried and evaporated in vacuo to leave a brown gum which was subjected to F.C.C. (A) eluting with DMethanol:NH, (70t35:2) then (83:15:2).

F. 2N sulphuric acid (3m1) was added to the mixture which was 1 1 1 -. 38 - then diluted with phosphate buffer (pH 6.5; 70m1) and extracted with DCM (4 x 30 ml) - Evaporation of the dried extract gave a gum which was subjected to F.C.C. (A) eluting with DCM:ethenol:NH3 (82:16:2) then (67:300).

G. As in A above except that 2.5m1 sulphuric acid and 100m1 phosphate buffer were used.

H. As in G above except that WM:ethanol:NH3 (78:20:2) was used as eluent.

I. Phosphate buffer (pH 63; 100m1) was added to the mixture which was extracted with DCM, then dried and evaporated to leave a yellow oil which was purified by F.C.C. (A) eluting with DCM:ethanol:NH3 (83:15:2).

J. As in E above except that DCM:ethanol:NH3 (83:15:2) then (75:220) was used as eluent.

is K. The mixture was poured into phosphate buffer (pH 6.5; 100m1) and extracted with EA (4 x 20m1). The combined extracts were dried and evaporated to give a yellow oil which was subjected to F.C.C. (A) eluting with ethanol:DCM:NH3 (25:75:3).

L. The mixture was filtered and the filtrate treated with 2N hydrochloric acid (30m1). The organic solvents were evaporated and the aqueous residue was wased with ER and extracted with DCM (3 x 20m1). The DCM extracts were evaporated to ca. 20m1, washed with phosphate buffer.(pH 6.5, 3 x 50m1) and evaporated. The residual foam was subjected to F.C.C. (A) eluting with -DCM:ethenol:NH 3 (80:18:2) then (80:17:3).

M. The mixture was treated with 1N sulphuric acid (1.5m1), poured into phosphate buffer (pH 6.5; 100m1) and then extracted with DCM (4 x 20m1). The combined organic extracts were dried and evaporated to give a yellow oil which was subjected to F.C.C. (A) eluting with DCM:ethanol:NH3 (75:25:3.5).

Example 2 (a) Ela_(Z)_,20.501-( )-6-[[2-[[41-(2-Amino-2-oxoethyl)E1,11biphenyll-4y 11 methoxy 1 -5- (hexahy dro-JH- az epin-l- y 1) cy clop enty 11 oxy 1-4-hexenoi c acid A mixture of Intermediate 31 (0.19g), 4-bromophenyl acetamide (0.2979), TTP (0.0229), aqueous 2N scottAm carbonate (2.5m1) and 112-dimethoxyethene (7m1) was stirred and refluxed under nitrogen for 1 1 1 1 1 i 1 i i i - 39 5h. 2N Sulphuric acid (2mt) was addedy then the mixture diluted with pH 6.5 phosphate buffer (50m1) and extracted with DCM. Evaporation of the dried organic extract gave a yellow solid, which was purified by F.C.C. (A) eluting with DCM:ethenol:NH3 (82:16:2) to give the title compound ' (0.185g) as a yellow foam'. T.l.c. (A) DMethanol:NH3 (67:30:3) Rf 0.10.. I.r. (CHBr3) 800, 1590p 1678p 1750.. 351cm-1.

i is The following compounds were prepared by the same method from a suitable boronic acid derivative and a substituted halobenzene:

(b) [la(Z),20,501-( )-6-[[2-(Hexahydro-1H-azepin-l-yl)-5[[41[[(methylemino)sulphonyllmeth_yl]F1,11-biphenyll-4yllmethoxyleyclopentylloxy)-4-hexenoic acid. T.l.c. (A) DCM:ethenol3 (67:30:3; run twice) Rf 0.53.

Analysis C32H44N 2 06S Found: C64.3; H7.5; N94.5. requires C,65.7; H,7.6; N,43%.

(c) Ela(Z)92P95p]-( )-6-[[2-[[41-(Acetylemino)E1,11-biphenyj-4-yl1 methoxy]-5-(hexahydro-1H-azepin-l-yl)cyclopentylloxy]-4-hexenoic acid.

T.l.c. (A) DCM:ethanol3 (68:30:2; run twice) Rf 0.45.

Analysis Found: C,71.7; H,8.5; N,4.7.

C33H44N205 requiresC,72.2; H8-.1; N,5.115o.

(d) [la(Z),201501-( )-6-[[2-(Hexahydro-1H-azepin-l-yl)-5[[311(methylsulphonyl)aminol Cl,l'-biphenyl3-4-YllmethoxylcyclopentylI oxy]-4-hexenoic acid. T.l.c. (A) DCM:ethanol3 (14:5:1) Rf 0.27.

Analysis Found: C63.4; H,M; N,4-7.

C31H42N2065 requires C,65.2, H97.4; N94.9%.

[C31H42N 206S.H20 requires C,63.3; H97.5; N4.8%1. (e) ElaM,2P 5a]-( )-6-[[2-(Hexahydro-1H-azepin-l-yl)-5-[[2-(methyl sulphonyl_)aminoj Cl,l'-biphenylj-4-yllmethoxylcyclopentylloxy]-4- hexenoic acid. T.l.c. (A) DC1.fiethanol:NH3 (14..5:1) Rf 0.30.

Analysis Found: C163.8; H17.1; N14.4.

C31H42N2065 requires C165.2; H,7.4; Nt4.9.

C31H42N206S. H20 requiresC963.3; H97.5; N4.Blm.

1 i - 40 (f) Ela(Z),2@,501-( )-6-[[[2-[21-1(Aminocarbonyl)aminol[1, 11biphenyl3-4-Yllmethoxyl5-(hexahydro-1H-azepin-l-yl)cyclopentylloxy]4-hexenoic acid. T.I.c. (A) DCM:ethenol:NH3 (13:6:1) Rf 0.39.

Analysis Found: C67.3;H,7.7;N,7.2.

C31H.,N30. requires C,69.5;H,73;N97.8%.

C31H41N3OCH20 requires C167.3;Hv73;Nv7.6%.

(g) [la(Z),20,501-( )-6-[[2-(Hexah-ydro-1H-azepin-l-yl)-5[[2'[(methylsulphonyl)aminolrl,ll-biphenyll-4-yllmethoxylcyclopentylloxy]4-hexenoic acid. T.l.c. (A) DCMzethanal:NH3 (14:5:1) Rf 0.49.

Analysis Found: C965.2; Ht7.2; N14.6.

C31H42N206S requires: C,65.2; Ht7.4; N,4.9%.

(h) [la(Z),20,501-( )-6-[[2-[[[2-[-(Acetylemino)methyll1 is biphenyll-4-yllmethoxy]-5-(hexahydro-1H-azepin-l-yl)cyclopentylloxy]4-hexenoic acid. T.l.c. (A) DCM:ethanol:NH3 (14:5:1) Rf 0.46.

Analysis Found: C69.3;H98.1;N4.8.

C33H.0205 requires C..72.2;H,,M;N95.1.

* C33 H 4,NO,.1.2mol H20 requires C,69.5;%M;N,4.9%.

(i) lla(Z),20,501-( )-6-[[2-[[2'-[[(1,1-Dimethylethoxy)carbonyll- methyl] 1,11-biphenyll-4-Yllmethoxy]-5-(hexahydro-1H-azepin-l-yl) cyclopentyllaxy]-4-hexenoic acid. T.l.c. (A) DMethenol:NH3 (14:5:1) Rf 0.71.

Analysis Found: C,70.7; H98.5; N,2.1.

C36H49NO6 requires C973.1; H18.3; N2.4.

C36H49NOCH20 requires C,70.9; H98.0; N72.3%.

(j) [la(Z),20,501-( )-6-[[2-(Hexahydro-1H-azepin-l-yl)-5-[[2'(hydroxyethyl)fl,l'-biphenyll-4-yllmethoxylcyclopent_ylloxy]-4-hexenoic acid. T.l.c. (A) DCM:ethenol:NH3 (25:8:1) Rf 0.25.

Analysis Found: C,71.5; H,8.0; N,2.51.

C32H43NO5 requires C.73.67; H98.31; N,2.68.

C32H43NO5M20 requiresC,71.15; H78.34; N92.59%.

i i i 1 (k) lla(Z)920,501.( )-6-[[2-[12_'-(2-Amino-2-oxoethyl)[1,1'-biphenyll4Yllmethoxy]-5-(hexahydro-1H-azepin-l-yl)cyclop tylloxy]-4-hexenoic acid hydrochloride. I.r. (CHBr3) 1600, 1675, 2200, 3400cm-1. T.l.c. (A) ER:methanol (3W Run twice Rf 0.2.

The title compound as a foam (0.459) was dissolved in DCM (0.1m.Q before adding ethereal hydrogen chloride to precipitate the title compound as an off-white solid (34%) which was washed with ER (2x5m.0 and dried in vacuo.

Analysis Found: Ct64.06;Ht7.86; Nt4.41.

C32H42NAMC1 requires C967.29; H,7.59; N14.9.

C32H42N205MC1 1.5H20 requires C,64.19; Ht7.68; N14.68%.

(1) Ela(Z),2P,5p]-( )-6-[[2-[[21-(Aminocarbonyl)E1,1'-biphenyll-4^ yllmethoxy]-5-(hexahydro-1H-azepin-l-yl)cyclopentylloxy]-4-hexenoic is acid. T.l.c. (A) DMethanol:NH, (25:8:1) Rf 0.2.

Analysis Found: C,69.55; Ht7.90; N,4.98.

C31H4ON20b.0.9H20 requires C,69.52; H,7.81; N,5.23%.

(m) lla(Z),2P,5P]-( )-6-[[2-[[2'-[(Dimeth_ylamino)methyll11,11-b_iphenyll4-yllmethoxy]-5-(hexahydro-1H-azepin-l-yl)cyclo2entyl1 oxy]-4-hexenoic acid. T.l.c. (A) DCM:ethanol:NH3 (75:25:4) Rf 0.52 Analysis Found:

Ct713; H8.8; N4.8. C33H46NO, requires C974.1; H,M; N45.2. C33H.6N2O.CH20 requires C,71.8; Hp8.7; N,5.1%.

(n) Ela(Z),20,503-( )-6-r[2-(Hexehydro-1H-azepin-l-yl)-5-[[21EE(methylamino)sulphonyllmethyll[1,1'-biphenyll-4-yllmethox_y1 cyclopentylloxy]-4-hexenoic acid. T.l.c. (A) ER:methanol (run twice) Rf 0.28.

Analysis Found: C,63.0; Hy73; N94.4.

C32H44N206 S requires C965.7; Ht7A; N94.8%.

c 32 H 44 N 2 0 6 S.H 2 0 requires C,63.8; H,M; N94.65%.

(o) [la,20(Z),3a]-( )-Methyl 4'-[[[12-1(5-carboxy-2-penten-l-yl)oxyl3-(hexahydro-)pentylloxylmethyll[1,11-biphenyll-2- carboxylate. T.l.c. (A) DCM:ethenal:NH3 (14:6:1) Rf 0.33.

The following Table II is a summary of the reaction conditions used to prepare the products of Examples 2(b) to 2(o).

1 ( 1 TABLE II

Ex. No. Intermediate used Halob&xze^e used Vol. of Vol. and Wt. of Reaction Work-up Yield (Ana weight) (and weight) solvent concentration TTP (9) Time (h) procedure (9) (M1) of No 2C0 3 2b 31 (0.29) (0.2g) 6 2.Sal, 2N 0422 4 A 0.115 2c 31 (0.1859) b (0.169) 6 2.5al, 2N 0.022 6 0.103 2d 31 (0.204g) c (0.22g) 10 Sal, 2N 0.04 3 c 0.051 2e 32 (0.269) d (0.2299) in 6m19 2N 0.038 5 D 0.174 2f 31 (0.1899) c 10 Sol, 2N 0.025 4 0.163 29 31 (0.207g) d (0.2489) 10 SM1, IN 0.034 4 F 0.137 2h f (n.??Rg) 10 6mi, 1N zi 31 (0.389) 9 (0.459) 20 10M1, im 0.07 2.5 H 2j (0.229) h (0. -34 7 2.5m1, 1M 2.5 1 2k 31 (0.235g) 7 2.5M1, lm G. '66 2 1 31 (3.24c) (0.235g) 8 3nu, 1M1 0. G3 7 2m 31 (0.256c) k (0.13g) 5 2. 5tr.l,- lm 0.033 2n 31 (0.2239) 1 (0.29) 10 3m1, 2N 0. G23 5.5 M r'. a6 31 '.254. M (0.1889) 3 2.5M1, lm O.DZ 3 3) j i i i 1 1 i i - 43 In column 3 of Table II above the halobenzene reagents designated a-m are as follows:

a. 4-iodo-N-methylbenzenemethanesulphonamide b. N-E(4bromophenyl)methyllacetemide c. N-(3-bromophenyl)methanesulphonamide d. N(2-bramophenyl)methanesulphonamide e. (2-bromopheny2urea f. N-[(2bromophenyl)methyllacetamide g. 1,1-dimethylethyl 2-bromobenzeneacetate h. 2-bromobenzeneethanol i. 2-bromophenylecetemide j. 2-bromobenzamide k. 2bromo-N,N-dimethylbenzylamine 1. 2-bromo-Nmethylbenzenemethanesulphonamide m. 2-bromobenzoic acid In column 8 of Table II above the work-up procedures designated A-N are as follows:

A. 2N Sulphuric acid (M1) was added to the mixture which was then diluted with phosphate buffer (pH 6.5, 40m1) and extracted with DCM (4 x 25m1). Evaporation of the dried extract gave a yellow gum which was subjected to F.C.C. (A) eluting with DCM:ethenol:NH, (82:16:2) and rechromatographed (A) eluting with DMethanol:NH, (85:13:1.5) then (82:16:2).

B. As in A above except that sulphuric acid (2.5m1) and phosphate buffer (50m1) were used and the initial chromatography used DCM:ethanol:NH, (82:16:2) then (75t23:2) as eluent.

C. Phosphate buffer (pH 6.5, 70m1) and 2N sulphuric acid (2.5m1) were added and the mixture was extracted with DCM (4 x 30m1). The organic extracts were dried and evaporated in vacuo to give an oil which was subjected to F.C.C. (A) eluting with WM:ethanol:NH3 (75:20:5) and rechromatographed (A) eluting with DCM:ethenol:NH3 (83:15:2).

D. The mixture was poured onto a mixture of phosphate buffer (pH 6.5, 50m1) and 2N sulphuric acid (M1) and extracted with DCM (3 x 30m1). The combined extracts were dried and evaporated in vacuo to leave an oil which was subjected to F.C.C. (A) eluting with DCM:ethanol:NH3 (83:15:2) then (75:22:3).

E. As in D above except that DCM:ethanol:NH3 (83:15:2) then (17:250) was used as eluent.

F. As in D above except that DCM:ethenol:NH3 (83:15:2) was used as eluent.

G. As in D aboveiexcept that the product was rechromatographed (A) eluting with DMethanol:NH3 (83:15:2).

H. As in F above except that the product of chromatography was dissolved in DCM (20m1), washed with phosphate buffer (pH 6.5 10M1) and the aqueous layer extracted with DCM (20m1). The combined organic extracts were dried and evaporated in vacup.

1. 2N Sulphuric acid (2.5m1) and phosphate buffer (pH 6.5, 30m1) were added and the aqueous phase was extracted with DCM (3 x 40m1).

The organic extracts were evaporated to give an oil which was stirred at 350 with 5N hydrochloric acid (6m1) and acetone (5m1) for 0.5h. ' The acetone was removed and the pH adjusted to 6 with solid potassium carbonate and phosphate bufter (pH 6.5, 40m1) was then added. The aqueous mixture was extracted with DCM (3 x 50m1) and the combined organic extracts.were evaporated to leave an oil. This oil was chromatographed (A) at a pressure of 10Omm using DCM:ethanol:NH3 (50:8:1) as eluent. The second fraction was evaporated.

J. 1M Sulphuric acid (3m1) was added followed by phosphate buffer (pH 6.5, 40m1). The mixture was extracted with DCM (4 x 40C) and the combined organic extracts were dried and evaporated to leave a solid.

The solid was subjected to chromatography (A) at a pressure o - f 10omm using DMethenol:NH3 (50:8:1) as eluent. The second fraction was collected and purified by eh romatography (A) at a pressure of 10Omm using ER:methanol (6:1+2:1) as eluent. The fourth fraction was collected and evaporated.

K. 1M Sulphuric acid (2.5m1) and phosphate buffer (pH 6.5, 50m1) were added. The mixture was extracted with DCM (3 x 50m1) and the organic extracts were dried and evaporated to a gum which was purified by F.C.C. (A) at a pressure of 150mm using DCM:ethenol:NH3 (50:8W as 1 1 1 i I i i i 1 1 i i eluent. The second fraction was collected and evaporated.

1. As in B above except that the initial chromatography used DCM:ethanol:NH3 (75:25:2) then (75:25:4) and further purification by chromatography was not necessary.

M. 2N Sulphuric acid (M1) and phosphate buffer (pH 6.5, 100m1) were added and the mixture extracted with DCM. The organic extract was dried and evaporated and the resulting gum was chromatographed (A) eluting with ER-methanol (3:1) then (2:1).

N. 2M Hydrochloric acid (2.5m1) and phosphate buffer (pH 6.5, 75m1) were added and the aqueous mixture extracted with EA (3 x 25m1).

The extract was acidified with 2M hydrochloric acid (20m1) and extracted with DCM (3 x 25m1). The combined organic extracts were dried and evaporated and the resulting oil was chromatographed (A) eluting with DMethenol:NH, (15:6:0.5 + 15:6:1) to give a gum. The is gum was dissolved in DCM, washed with phosphate buffer (pH 6.5) and dried.

Example 3 lla,20(Z)93a]-( )-41-[[12-[(5-Carboxy-2-penten-l-yl)oxy]-3-(hexahydro1H-azepin-l-yl)cXclopentylloxylmethyllll,ll-biphenyll-2-acetic acid A solution of the product of Example 2(i) (370mg) in ethanol (6m.0 was stirred at reflux with sodium hydroxide (2M; 3mX) under nitrogen for 4h. The mixture was poured-onto hydrochloric acid (2M; 25m1) and extracted with DCM (3x25m1). The combined organic extracts were dried and evaporated in vacuo to leave a grey gum. F.C.C. (A) eluting with DMethanol:NH, (83:15:2) then WM:ethanol (75:25) gave the title compound as a cream foam (105m9). T.l.c. (A) DCM:ethenol:NH3 (14:5:1) Rf 0.11. I.r. (CHBr3) 3500-2300, 2500, 1710, 1600cm-1.

Example 4 [lcc,2p(Z),3a]-( )-41-[112-1(5-Carbon-2-penten-l-yl)oxy]-3(hexahydrg-IH,-azepin-l-yl)CYclO2entylloxylmethyll[1,1'-biphenyll-2carboxylic acid hydrochloride A solution of the product of Example 2(o) (130mg) in ethanol 1 4 - 46 (1.5mX) was treated with sodium hydroxide (2M, 1.0m1) and heated at reflux for 45min. The mixture was poured into a mixture of pH 6.5 phosphate buffer (20mA) and 2M hydrochloric acid (10mi) and extracted with DCM (5x8mX). The DCM extracts were dried and evaporated,to give the title compound (126m9) as a pale yellow gum. T.l.c. (A) DCM:ethenol:NH3 (20:5:1) Rf 0.05. I.r. (CHB.r3) 3670, 3300-2200, 1700, 1600cm-1.

Example 5 [1a.,20,5a]-( )-6-1[2-(Hexahydro-'1H-azepin-l-yl)-5-[[21-(hydroxymethyl) [1,11-biphenyll-4-yllmethoxylcyclopentylloxylhexanoic acid A solution of the product of Example 1(j) (0.29) in absolute ethanol (20mú) was added under vacuum to wet 10% palladium on charcoal (120mg). The vessels were flushed with hydrogen and the alkene was is hydrogenated at 1 atmosphere and room temperature for 2h. The mixture was filtered, washing with ethanol, and the filtrate was evaporated in vacuo to leave.a brown gum. F.C.C. (A) cluting with DCM:ethanol:NH3 (75:22:3) gave the title compound as a cream foam (126mg). T.l.c. (A) DCM:ethenol:NH3 (14:5:1) Rf 0.22.

Analysis Found: C,71.8;H99.0;N92.6.

C31H.3NO, requires C,73.1;H98.5;N92.8%.

C31H.3NO.O.5H20 requires C971.8;H98.5;N92.7%.

Example 6 [la,20,5p]-( )-6-112-(Hexahydro-1H-azepiri-l-yl)-5-[121-(hydroxymethyl) [1,11-biphenyll-4-yllmethoxylcyclopentylloxylhexanoic acid A solution of the product of Example 1(a) (120mg) in ethanol (10mú) was added, under vacuum, to wet 10% palladium on carbon catalyst (40m9) and the resulting slurry was hydrogenated at 1 atmosphere and room temperature with vigorous stirring. After 4h the catalyst was filtered off and the filtrate was evaporated to leave z i 1 i i i 1 A 1 i - 47 an orange oil which was subjected to F.C.C. (A) eluting with DCM:ethanol:NH3 (67:300) to give the title compound as a pale yellow oil (104mg). T.l.c. (A) ethanol:DCM:NH3 (20:80:3) (ran twice) Rf 0.08.I.r. (CHBr3) 3600, 2700-1900 (br), 1700, 1600cm71 Example 7 [la(Z)29,501-( )-6-[[2-(Hexahydro-IH-azRein-l-yl)-5[[21(hydroxymethyl)[191'-biphenyll-4-yllmethoxylcyclopentylloxy]4hexenoic acid, p-cyclodextrin complex U:1) A solution of the product of Example 1(a) (210m9) in methanol (5mú) was added to a solution of P-eyclodextrin (470%) in water (20m1) and the solution was evaporated. The residue was dissolved in hot water (5mC, filtered, and allowed to cool. The resulting suspension was filtered to give the title compound as a white solid is (285m9), m.p. M00 (darkens).

Analysis Found: Ct49.5; Ht6.6; N90.8.

C31H4INOS. C42H70035 7H20 requires C,49.6; H97.1; NpO.8%.

The term "active ingredienC as used below refers to a compound of the invention and may be, for example, a compound according to one of the previous examples, such as [la(Z),2p,5p]-( )-6-[[2-(hexahydro-1Hazepin-l-yl)-5-[[2'-(hydroxymethyl)[1,1l-biphenyll-4-yllmethoxyI cyclopentylloxy]-4-hexenoic acid or a physiologically acceptable salt, solvate or cyclodextrin (e.g. P-cyclodextrin) complex thereof.

Pharmaceutical Examples (i) Tablets These may be prepared by direct compression or wet granulation. The direct compression method is preferred but may not be suitable in all cases as it is dependent upon the dose level and physical characteristics of the active ingredient.

48 - A. Direct Compression Active Ingredient Microcrystalline Cellulose NF Magnesium Stearate BP mg/tablet 100.00 298.00 2.00 Compression Weight 400.00mg j The active ingredient is sieved through a 250p sieve, blended with the excipients and compressed using 1O.Omm punches. Tablets of other strengths may be prepared by altering the compression weight and using punches to suit.

B. Wet Granulation mg/tablet Active Ingredient 100.00 is lactose BP 238.00 Starch BP 40.00 Pregelatinised Maize Starch BP 20.00 Magnesium Stearate BP 2.00 Compressed Weight 400.00mg The active ingredient is sieved through a 250pm sieve and blended with the lactose, starch and pregelatinised starch. The mixed powders are moistened with purified water, granules are made, dried, screened and blended with the magnesium stearate. The lubricated granules are compressed into tablets as described for the direct compression formula.

The tablets may be film coated with suitable film forming materials, e.g. methyl cellulose or hydroxypropyl methyl cellulose using standard techniques. Alternatively the tablets may be sugar coated.

z t X (ii) Capsules Active Ingredient STA-U 1500 Magnesium Steqrate BP Fill Weight mg/capsule 100.00 99.00 1.00 200.00mg 1 A form of directly compressible starch supplied by Colarcorn 10 Ltd., Orpington, Kent.

The active ingredient is sieved through a 250pm sieve and blended with the other materials. The mix is filled into No. 2 hard gelatin capsules using a suitable filling machine. Other doses may be is prepared by altering the fill weight and if necessary changing the capsule size to suit.

(iii) Inhalation cartridges Active Ingredient (micronised) Lactose BP to mg/cartridge 3.00 25.00 The active ingredient is micronised in a-fluid energy mill to a fine particle size range prior to blending with normal tabletting grade lactose in a high energy mixer. The powder blend is filled into No. 3 hard gelatin capsules on a suitable encapsulating machine.

The contents of the cartridge are administered using a powder inhaler.

T 1 i i i i - 50 (iv) Metered Dose Pressurised Aerosol mg/metered Per Can dose Active Ingredient (micronised) 0.500 120mg Oleic Acid BP 0.050 12mg Trichlorofluoromethane BP 22.25 5.349 Dichlorodifluoromethane BP 60.90 14.629 The active ingredient is micronised in a fluid energy mill to a fine particle size range. The oleic acid is mixed with the trichlorofluoromethane at a temperature of 10-150 and the micronised drug is mixed into this solution with a high shear mixer. The suspension is metered into aluminium aerosol cans and suitable metering valves, delivering a metered dose of 85 mg of suspension, are crimped onto the cans and the dichlorodifluoromethene is pressure filled into the cans through the valves.

(v) syrup 1 mg/5m1 dose Active Ingredient 100.00 Buffer Flavour Colour as required Preservative Thickening Agent Sweetening Agent Purified Water to 5.00 ml 1 i The active ingredient, buffer, flavour, colour, preservativey thickening agent and sweetening agent are dissolved in some of the water, the solution is adjusted to volume and mixed. The syrup produced is clarified by filtration.

i 1 1 1 1 - 51 (vi) Injection for Intravenous Administration Active Ingredient Water for injections BP to 50mg 5m1 Sodium chloride or any other suitable material may be added to adjust the tonicity of the solution and the pH may be adjusted to that of maximum stability of the active ingredient using dilute acid or alkali or by the addition of suitable buffer salts. The solution Is prepared, clarified and filled into appropriate sized ampoules sealed by fusion of the glass. The injection is sterilised by heating in an autoclave using one of the acceptable cycles. Alternatively the solution may be sterilised by filtration and filled into sterile ampoules under aseptic conditions. The solution may be packed under an inert atmosphere of nitrogen.

is 1 (vi) Suspensions Active Ingredient Aluminium monostearate Sweetening agent Flavour Colour Fractionated coconut oil to mg/5m1 dose 100.00 75.00 as required 5. 00m1 The aluminium monostearate is dispensed in about 90% of the fractionated coconut oil. The resulting suspension is heate.d to 1150 while stirring and then cooled. The sweetening agentg flavour and colour are added and the active ingredient is suitably dispersed. The 30 suspension is made up to volume with the remaining fractionated coconut oil and mixed.

Claims (11)

CLAIMS:

1. Compounds of the general formula (1) (CH 2) R 2 # (CH2)x 0Alk-e v 0-0 Q;'XIA(CH2)n X(CH2)mCO2R1 1 VY wherein:

RI is a hydrogen atom or a methyl group; X is cis or trans -CH=CH- or CH2CH2-, m is 2 3 or 4 and n is 1; or X is trans -CH=CH-, m is zero and n is 3; Y is a saturated heterocyclic amino group (attached to the cyclopentane ring via the nitrogen atom) which has 5-8 ring members and (a) optionally contains in the ring -0-, -S-, -S02- or -NR-3a_ and /or (b) is optionally substituted by one or more Cl_.alkyl groups; Alk is a straight or branched Cl-5alkyl chain; I is zero or 1; p is zero, 1, 2, 3 or 4; R 2 is a hydroxyl group or a group selected from -OCOR3, _CO 2R3 -CONR3R4, -502NR3R4, -NHCOR3, -NHSO2R5, -SO2RS9 -5R59 - NR3R4, -COR5, -NHCONR3R4 and -NHCSNH2; R3, R3a and R4, which may be the same or different, represent a hydrogen atom or a C 1-4 alkyl or C -1,aralkyl group; and R5 is a Cl- 4alkyl group; and the physiologically acceptable salts, solvates and cyclodextrin complexes thereof.

2. Compounds as claimed in Claim 1 in which Y is a saturated heterocyclic amino group which has 5, 6 or 7 ring members and optionally contains in the ring -0-.

1 1 1 a

3. Compounds as claimed in Claim 1 or Claim 2 in which n is 1, m is 2 and R1 is a hydrogen atom.

4. Compounds as claimed in any preceding claim in which the group 0-0 # -(CH2).-\ (CH2) p R2 is attached at the pare position of the phenyl group in the rest of the molecule, I represents zero and p is zero, 1 or 2.

I

5. Compounds as claimed in Claim 1 having the formula (1c) is 0Alk--\,,,%OCH2XCH2CH2CO2H VY (CH 2)n R 2 (le) and the physiologically acceptable salts, solvates and cyclodextrin complexes thereof, wherein X is cis or trans -CH=CH- or -CH2CH2-, Y is a saturated heterocyclic amino group which has 5,

6 or-7 ring members and optionally contains in the ring -0-,-Alk is a straight C 1-3alkyl chain, p is zero, 1 or 2 and R2 is -0Ht -CO2H, -CONH2, -NHCOCH31 -NHSO 2CHP - 502NHCH3t -NHCONH2 or -S02 CH3' 6. Compounds of formula (1A)as claimed in any preceding claim in which the carbon atom carrying the a-side chain is in the R 30 configuration.

7. Compounds as claimed in Claim 1, said compounds being [la(Z)t2P95p]-( )-6-[[2-(hexahydro-1H-azepin-l-yl)-5-[[2'hydroxymethyl(1, 11-biphenyl)-4-yllmethoxylcyclopentylloxy]-4- hexenoic acid, or a physiologically acceptable salt, solvate or cyclodextrin complex thereof.

1 i 1 1 1 i i

8. A process for the preparation of a compound as claimed in Claim 1 which comprises:

(A) reacting a compound of formula (2) A I # 0Alk--- (CH2)n X(CH2)mCO2R1 (2) 1 VY (where A is a displaceable atom or group) or a salt thereof to replace is (CH 2) R 2 1 i the moiety A with the group -(CH2) 1 1 (B) in the preparation of compounds of formula (1) in which R1 is a hydrogen atom and ú is zero, reacting a boronic acid derivative of formula (8) 1 1 i B (OH) 9 0Alk--- \ bib,;O(CH2) n X(CH2) m CO 2H "Y with a halobenzene of formula (9) r R202) p 0 \ / &--A l= (9) (where A is a halogen atom); (c) in the preparation of compounds of formula (1) in which X is -CH=CH-, reacting a compound of formula (10) (CH 2) R 2 n (CH2).-- \ / a # AkIl, 0Alk- WH2)n CHO is (10) v Y with a compound R7 3P=CH(CH2)mCO2R1 (where R7 'S Cl-6alkyl or aryl) or a salt thereof; (D) alkylating an alkoxide of an alcohol of formula (11) (CH 2) R 2 p (CH 2 OH (11) with an alkylating agent L(CH2)nX(CH2)MCO2R8 (where L is a leaving group and R8 is a methyl group or an acid protecting group); - 56 (E) in the preparation of a compound containing a group -COOH, hydrolysing a corresponding ester; (F) in the preparation of a compound in which R1 is a methyl group. methylating the corresponding compound.in which R1 is a hydrogen atom; (G) in the preparation of a compound in which X is trans -CH=CH-, isomerising the corresponding cis compound; (H) in the preparation of a compound in which X is -CH2CH-y reducing the corresponding compound in which X is -CH=CH-; and/or (I) in the preparation of a salt, treating a compound of formula (1) is with an acid or a base.

9. A pharmaceutical composition comprising a compound as claimed in any preceding claim together with one or more pharmaceutical carriers.

10. A compound of formula (2) as def ined in Claim (8) and salts thereof. a

11. Compounds as claimed in Claim 1 for-use in human and animal medicine.

Published 1988 at The Patent Office. State House. 66 71 High Holborn. London WC1R 4TP. Fuxther copies may be obt=e": from The Patent Office.

Sales Branch, St Mary Cray. Orpington. Kent BR5 3RD. Printed by MWtiplex techniques ltd. St Mary Cray. Kent Con. 1'87 1 i i 1 i j 1 i i 1 i i 1 i 1 X