AU3013399A - Substituted heterocyclic compounds, preparation method therefor and pharmaceutical compositions containing same - Google Patents

Description

AUSTRALIA

PATENTS ACT 1990 DIVISIONAL APPLICATION r r o s n o o NAME OF APPLICANT(S):

SANOFI

ADDRESS FOR SERVICE: DAVIES COLLISON CAVE Patent Attorneys 1 Little Collins Street Melbourne, 3000.

IP Australia C Documents received on: 0 19 MAY 1999 Batch No: INVENTION TITLE: "SUBSTITUTED HETEROCYCLIC COMPOUNDS, PREPARATION METHOD THEREOF AND PHARMACEUTICAL COMPOSITIONS CONTAINING SAME" The following statement is a full description of this invention, including the best method of performing it known to us: Q:\OPER\MKR\46669-96JJIV -19/5/99

I

il OjPER MIKR 46669 96 DIV IS 1A The present invention relates to novel intermediate compounds useful in the synthesis of substituted heterocyclic compounds that possess pharmaceutical activity.

More particularly, the present invention relates to intermediates used in the synthesis of a novel class of substituted heterocylic compounds for therapeutic use in pathological phenomena involving the tachykinin system, such as: pain Regoli et al., Life Sciences, 1987, 40, 109-117), 10 allergy and inflammation Morlay et al., Life sciences, 1987, 41, 527-544), circulatory insufficiency Losay et al., 1977, Substance P, Von Euler, I.S.

S* and Pernow ed., 287-293, Raven Press, New York), gastrointestinal disorders Regoli et al., Trends Pharmacol. Sci., 1985, 6, 481-484), respiratory disorders Mizrahi et al., Pharmacology, 1982, 25, 39- 50), neurological disorders and neuropsychiatric disorders Maggi et al., J. Autonomic Pharmacol., 1993, 13, 23-93), these examples being neither limiting nor exclusive.

In recent years, numerous research studies have been carried out on tachykinins and their receptors.

Tachykinins are distributed throughout both the central nervous system and the peripheral nervous system. The tachykinin receptors have been recognized and are classified into three types: NK,, NK,, NK,. Substance P (SP) is the endogenous ligand of the NK, receptors, neurokinin A that of the NK, receptors and neurokinin B that of the NK, receptors.

The NK,, NK, and NK, receptors have been identified in different species. A review by C.A.

Maggi et al. looks at the tachykinin receptors and their antagonists and gives an account of the pharmacological studies and the applications in human therapeutics Autonomic Pharmacol., 1993, 11, 23-93).

2 The following non-peptide compounds may be mentioned among the antagonists specific for the NK 1 receptor: CP-96345 Med. Chem., 1992, 35, 2591- 2600), RP-68651 (Proc. Natl. Acad. Sci. USA, 1991, _8, 10208-10212), SR 140333 (Curr. J. Pharmacol., 1993, 250, 403-413).

For the NK, receptor, a non-peptide selective antagonist, SR 48968, has been described in detail (Life Sci., 1992, 50, PL101-PL106).

10 As far as the NK, receptor is concerned, some non-peptide compounds have been described as having an affinity for the NK, receptor of the rat and guinea-pig brain (FASEB 1993, 2 A710-4104); a peptide antagonist, [Trp',B-Alae]NKA, which has a weak specificity for the NK, receptor of the rat, has also been described Autonomic Pharmacol., 1993, 13, 23-93).

Patent application EP-A-336230 describes peptide derivatives which are substance P and neurokinin

A

antagonists useful for the treatment and prevention of asthma.

International patent applications WO 90/05525, WO 90/05729, WO 91/09844 and WO 91/18899 and European patent applications EP-A-0436334, EP-A-0429466 and EP- A-0430771 describe substance P antagonists.

European patent applications EP-A-0474561,

EP-

A-512901, EP-A-515240, EP-A-559538 and EP-A-591040 also relate to neurokinin receptor antagonists.

Novel substituted heterocyclic compounds have now been found which are neurokinin receptor antagonists.

P:\OPER\MKR\46669-96.DIV 18/5/99 2A According to one of its features, the present invention relates to a compound of the formula

D

E-O- (CH2)m-C-L

(XXXX)

I

Arl in which: m is 2 or 3; Ar 1 is a phenyl which is unsubstituted or monosubstituted or polysubstituted by a substituent selected from a halogen atom, a hydroxyl, a (C 1

-C

4 15 alkoxy, a (Ci-C 4 )-alkyl, a trifluoromethyl and a methylenedioxy, said substituents being identical or different; a thienyl which is unsubstituted or substituted by a halogen atom; a benzothienyl which is unsubstituted or substituted by a halogen atom; a 20 naphthyl which is unsubstituted or substituted by a halogen atom; an indolyl which is unsubstituted or Nsubstituted by a (C,-C 4 )-alkyl or a benzyl; an imidazolyl which is unsubstituted or substituted by a halogen atom; a pyridyl which is unsubstituted or 25 substituted by a halogen atom; or a biphenyl; E is a hydrogen or an O-protecting group; L is a cyano group or an aminomethyl group; D is a group selected from:

-CH

2 -OH, -N-RI;

I

M

G is a hydrogen or an O-protecting group; M is a hydrogen or an N-protecting group; and RI is a hydrogen or a (CI-C 4 )-alkyl P:\OPER\MKR\46669-96.DIV 195199 2B in enantiomerically pure form or in racemic form if L is an aminomethyl group.

The compounds claimed in the present application have utility in synthesis of compounds of the formula 3

A

Am-(CH,)m-C-CH-N-T

I

Ar, in which: A is a divalent radical selected from: AX) -O-CO-

A

2

-CH,-O-CO-

A

3

-O-CH,-CO-

A

4

-O-CH

2

-CH,-

A) -N(R )-CO-CO- A -N(R As) -0-CH,in which R X is a hydrogen or a (C,-C 4 )-alkyl; m is 2 or 3; Ar 1 is a phenyl which is unsubstituted or monosubstituted or polysubstituted by a substituent selected 20 from a halogen atom, a hydroxyl, a (C,-C 4 )-alkoxy, a

(C,-C

4 )-alkyl, a trifluoromethyl and a methylenedioxy, said substituents being identical or different; a thienyl which is unsubstituted or substituted by a halogen atom; a benzothienyl which is unsubstituted or substituted by a halogen atom; a naphthyl which is unsubstituted or substituted by a halogen atom; an indolyl which is unsubstituted or N-substituted by a (C,-C 4 )-alkyl or a benzyl; an imidazolyl which is unsubstituted or substituted by a halogen atom; a pyridyl which is unsubstituted or substituted by a halogen atom; or a biphenyl; T is a group selected from CH,-Z, -CH(CH,) 2 and

-C(C

6 T can also be the group -CO-B-Z if A is a divalent radical selected from -O-CH 2

-CH

2

CH,-CH

2 and -O-CH 2 4 B is a direct bond or a methylene; Z is an optionally substituted mono-, di- or tricyclic aromatic or heteroaromatic group; and Am is: i either a group Am, of the formula J N- 10 in which J 1 is: i either a group Ar -N-CH- R 2 in which: Ar, is a pyridyl; a phenyl which is unsubstituted or monosubstituted or polysubstituted by a substituent selected from a halogen atom, a hydroxyl, a (C 1

-C

4 alkoxy, a (CL-C 4 )-alkyl, a trifluoromethyl, a nitro and a methylenedioxy, said substituents being identical or different; a thienyl; a pyrimidyl; or an imidazolyl which is unsubstituted or substituted by a

(C,-C

4 )-alkyl; and

R

2 is a hydrogen; a (C,-C,)-alkyl; a benzyl; a formyl; or a (C-C,)-alkylcarbonyl; i, or a group Ar 2 -c R3 in which: Ar, is as defined above; n is 0 or 1; and R 3 is a group selected from: hydrogen; (C,-C,)-alkyl; formyl; 7 )-alkylcarbonyl; cyano;

-(CH.

2 ).4OH; -(CH,)q,-OCHO; -(CH)qOR; a(10) -(CH,)q,-OCONH-(C,-C,)-alkyl; (11) -NR 4

R

5 6

COOR.;

(14) -NR 6

,SO

2

R

9

-(CH.

2 )q,,NR.C(=W,)NR,,Riii_ (16) -CH 2 -NR3 1 2

R

13 (17) -CH 2

-CH

2 -NR3 R3,

-COOH;

(19) (C,-C-,)-alkoxycarbonyl; (21) -CH 2

-COOH;

(22) -alkoxycarbonylmethyl; (23) -CH 2 -C(=W,9NR,,R, 11 (24) -O-CH 2

CH

2 -OR 3.;

-NRCOCOR,_,;

(26) -CO-NR 20

-NR

21

_R

22 (27)

N

NR

24

R

2 6 (28) N. 0 N, N or R 3 constitutes a double bond between the carbon atom to which it is bonded and the adjacent carbon atom of the piperidine ring; 10 q is 0, 1 or 2; W is an oxygen atom or a sulfur atom; R and R 5 are each independently a hydrogen or a C)-alkyl; R 5 can also be a (CC-C,)-cycloalkylmethyl, a benzyl or a phenyl; or R 4 and together with the nitrogen atom to which they are bonded, form a heterocycle selected from azetidine, pyrrolidine, piperidine, morpholine, thiomorpholine, perhydroazepine and piperazine which is unsubstituted or substituted in the 4-position by a (C,-C 4 )-alkyl;

R

6 is a hydrogen or a (C 1

-C

7 )-alkyl R, is a hydrogen; a (C,-C,)-alkyl; a vinyl; a phenyl; a benzyl; a pyridyl; a (C 3 -C,)-cycloalkyl which is unsubstituted or substituted by one or more methyls; a furyl; a thienyl; a pyrrolyl; or an imidazolyl; or R 6 and R, together are a group p is 3 or 4; R. is a (C -C,)-alkyl or a phenyl; R, is a (C,-C,)-alkyl; an amino which is free or substituted by one or two (C,-C,)-alkyls; or a phenyl which is unsubstituted or monosubstituted or polysubstituted by a substituent selected from a halogen atom, a (C,-C,)-alkyl, a trifluoromethyl, a hydroxyl, a (C.-C,)-alkoxy, a carboxyl, a (C,-C,)-alkoxycarbonyl, a (C 1 -C,)-alkylcarbonyloxy, a cyano, a nitro and an amino which is free or substituted by one or -7 two (C 1 -C.,)-alkyls, said substituents being identical or different; -R 3 0 and R 3- are each independently a hydrogen or a (c 1 ,-c,)-alkyl; R 3.2 can also be a 7 )-cycloalkyl, a (C 3 ,-C,)-cycloalkylmethyl, a hydroxyl, a (C X-C 4 alkoxy, a benzyl or a phenyl; or and together with the nitrogen atom to which they are bonded, form a heterocycle selected from azetidine, pyrrolidine, piperidine, morpholine, thiomorpholine 10 and perhydroazepine; R 3 2 and R 3 3 are each independently a hydrogen or a R 2 3 can also be a (C,-C,)-cycloalkylmethyl or a benzyl; R 3 7 is a a (C,,-C,)-cycloalkyl which is unsubstituted or substituted by one or more methyls; a phenyl; or a pyridyl; .8i a hydrogen; a (C,-C 7 ,)-alkyl; a formyl; or a 7 -alkylcarbonyl; R -R9 is a )-alkoxy;

R

2 0 is a hydrogen or a (C.

1

-C

7 )-alkyl; R 2 3 and R 2 2 are each independently a hydrogen or a or alternatively R 2 1 and R 22 1 together with the nitrogen atom to which they are bonded, form a heterocycle selected from pyrrolidine, piperidine and morpholime; R 2 1 is a hydrogen or a (C,-C,)-alkyl; and

R

2 4 and R 2 5 are each independently a hydrogen or a

(C

1 -C,)-alkyl; can also be a formyl or a alkylcarbonyl; 3-or agroup 8in which: R 3 is as defined above; -R X 4 is a 7 )-alkyl or a (C,-C,)-cycloalkyl; R X 4 can also be either a group -CONR 1 5 if R 3 is hydrogen, or a group -NR 1 5

R

1 6 if R 3 is hydrogen, a cyano, a carboxyl, a (Cl-C 7 )-alkoxycarbony. or a group -C(=W 1 )NRl 0

R

11 and and are each independently a (C,-C.,)-alkyl; or R 3- 5 and together with the nitrogen atom to *:10 which they are bonded, form a heterocycle selected from azetidine, pyrrolidine, piperidine, morpholine, thiomorpholine and perhydroazepine; **ii or a group Am 2 of the formula

J

2

N

in which J 2 is: ii,- either a group *Ar 3

N-CH-

*6**2 in which: Ar, is a phenyl which is unsubstituted or monosubstituted or polysubstituted by a substituent selected from a halogen atom, a hydroxyl, a (C,-C,)-alkoxy, a

(C

1

,-C

4 ,)-alkyl and a trifluoromethyl, said substituents being identical or different; and R 2 is as defined above for J.; ii 2 or agroup Ar 3 -(CH2)n-CHin which: 9 Ar, is as defined above; n is 0 or 1; Q is a (C-C 6 )-alkyl or a benzyl, said substituent being either in the axial position or in the equatorial position; and Xe is an anion; iii or a group Am, of the formula Ar2-(CH2)- N

X*

in which: Ar2 is as defined above; n is 0 or 1; and Xe is an anion; iv or a group Am 4 of the formula 2r X A 2 nX(CH 2 in which: Ar, is as defined above; n is 0 or 1; and Xe is an anion; and the salts thereof, where appropriate, with mineral or organic acids.

The compounds of formula according to the invention also include the racemates, the optically pure isomers and the axial and equatorial isomers if Am is Am 2 in the compound of formula More particularly, the radical Z can be a phenyl group which can be unsubstituted or may contain one or more substituents.

If Z is a phenyl group, it can be monosubsti- 10 tuted or disubstituted, especially in the 2,4-position but also, for example, in the 3,4- or position; it can also be trisubstituted, especially in the 2,4,6-position but also, for example, in the 2,4,5- or 3,4,5-position, tetrasubstituted, for example in the 2,3,4,5-position, or pentasubstituted.

The radical Z can also be a bicyclic aromatic group such as 1- or 2-naphthyl; or 10 6- or 7-indenyl in which one or more bonds can be b hydrogenated, it being possible for said groups to be 0 unsubstituted or optionally to contain one or more substituents such as the alkyl, phenyl, cyano, hydroxy- Salkyl, hydroxyl, oxo, alkylcarbonylamino, alkoxycarbonyl, thioalkyl, halogen, alkoxy or trifluoromethyl group, in which the alkyls are C,-C 4 The radical Z can also be a pyridyl, thiadiazolyl, indolyl, indazolyl, imidazolyl, benzimidazolyl, benzotriazolyl, benzofuranyl, benzothienyl, benzothiazolyl, benzisothiazolyl, quinolyl, isoquinolyl, benzoxazolyl, benzisoxazolyl, benzoxazinyl, benzodioxinyl, isoxazolyl, benzopyranyl, thiazolyl, thienyl, furyl, pyranyl, chromenyl, isobenzofuranyl, pyrrolyl, pyrazolyl, pyrazinyl, pyrimidinyl, pyridazinyl, indolizinyl, phthalazinyl, quinazolinyl, acridinyl, isothiazolyl, isochromanyl or chromanyl group, in which one or more double bonds can be hydrogenated, it being possible for said groups to be unsubstituted or optionally to contain one or more substituents such as the alkyl, phenyl, cyano, hydroxyalkyl, hydroxyl, alkylcarbonylamino, alkoxycarbonyl or thioalkyl group, in which the alkyls are In particular, the invention relates to compounds of formula in which: Z is Z' and is: 11 a phenyl which is unsubstituted or monosubstituted or polysubstituted by a substituent selected from a halogen atom; a trifluoromethyl; a cyano; a hydroxyl; a nitro; a phenyl which is unsubstituted or monosubstituted or polysubstituted by a halogen, a trifluoromethyl, a (C,-C,)-alkyl, a hydroxyl or a C.)-alkoxy, said substituents being identical or different; an amino which is unsubstituted or monosubstituted or polysubstituted by a (C 1

-C

4 )-alkyl; a 10 benzylamino; a carboxyl; a (C,-C,)-alkyl; a cycloalkyl which is unsubstituted or monosubstituted ~or polysubstituted by a methyl; a (C,-C,,)-alkoxy; a

(C

3 -C )-cycloalkoxy which is unsubstituted or mono- S: substituted or polysubstituted by a methyl; a mercapto; a (C,-C,,)-alkylthio; a formyloxy; a alkylcarbonyloxy; a formylamino; a (C 1 -C,)-alkylcarbonylamino; a benzoylamino; a (C,-C,)-alkoxycarbonyl; a (C 3

-C

7 )-cycloalkoxycarbonyl; a (C 3

-C

7 -cycloalkylcar- N 0 bonyl; a carbamoyl which is unsubstituted or monosubstituted or disubstituted by a (C 1

-C

4 )-alkyl; a ureido which is unsubstituted or monosubstituted or disubstituted in the 3-position by a (C 1

-C

4 )-alkyl or a ease*:

(C

3

-C

7 )-cycloalkyl; and a (pyrrolidin-l-yl)carbonylamino, said substituents being identical or different; a naphthyl which is unsubstituted or monosubstituted or polysubstituted by a halogen, a trifluoromethyl, a (C,-C,)-alkyl, a hydroxyl or a (C alkoxy; or a pyridyl, a thienyl, an indolyl, a quinolyl, a benzothienyl or an imidazolyl.

It is possible to form salts of the compounds of formula other than the quaternary ammonium salts. These salts include those with mineral and organic acids which permit a suitable separation or crystallization of the compounds of formula such 12 as picric acid, oxalic acid or an optically active acid, for example a mandelic or camphosulfonic acid, and mineral and organic acids which form pharmaceutically acceptable salts such as the hydrochloride, hydrobromide, sulfate, hydrogensulfate, dihydrogenphosphate, methanesulfonate, methylsulfate, maleate, fumarate, naphthalene-2-sulfonate, benzenesulfonate, gluconate, citrate, isethionate, or ptoluenesulfonate.

10 The anions Xe are those normally used to salify quaternary ammonium ions and are preferably chloride, bromide, iodide, acetate, hydrogensulfate, methanesulfonate, paratoluenesulfonate and benzenesulfonate ions.

It is preferable to use the pharmaceutically acceptable anions, for example chloride, methanesulfonate or benzenesulfonate.

In the present description, the alkyl groups or alkoxy groups are linear or branched; halogen atom is P understood as meaning a chlorine, bromine, fluorine or 20 iodine atom.

In the substituents of the group Z phenyl,

(C.-C

1 o)-alkyl is understood as meaning for example a methyl, an ethyl, an n-propyl, an isopropyl, an nbutyl, an isobutyl, a sec-butyl, a tert-butyl, a pentyl or n-pentyl, a hexyl or n-hexyl, a heptyl or n-heptyl, an octyl or n-octyl, a nonyl or n-nonyl or a decyl or n-decyl; (C,-C,)-cycloalkyl optionally substituted by a methyl is understood as meaning for example a cyclopropyl, a cyclobutyl, a cyclopentyl, a 2- or 3methylcyclopentyl, a cyclohexyl, a 3- or 4methylcyclohexyl, a cycloheptyl or a cyclooctyl; (C 1 C,,)-alkoxy is understood as meaning for example a methoxy, an ethoxy, an n-propoxy, an isopropoxy, an nbutoxy, an isobutoxy, a sec-butoxy, a tert-butoxy, a pentoxy, a hexyloxy, a heptyloxy, a nonyloxy or a 13 decyloxy; (C,-C,)-cycloalkoxy optionally substituted by a methyl is understood as meaning for example a cyclopropoxy, a cyclohexyloxy, a 3- or 4-methylcyclohexyloxy, a cycloheptyloxy or a cyclooctyloxy;

(C,-C

1 ,)-alkylthio is understood as meaning for example a methylthio, an ethylthio, an n-propylthio, an isopropylthio, an n-butylthio, an isobutylthio, a secbutylthio, a tert-butylthio, a pentylthio, a hexylthio, a heptylthio, an octylthio, a nonylthio or a decylthio; (C -C,)-alkylcarbonyloxy is understood as meaning for example an acetoxy, a propionyloxy, a butyryloxy, a valeryloxy, a caproyloxy or a heptanoyloxy; alkylcarbonylamino is understood as meaning for example an acetylamino, a propionylamino, a butyrylamino, an isobutyrylamino, a valerylamino, a caproylamino or a heptanoylamino; (C,-C 4 )-alkoxycarbonyl is understood as meaning for example a methoxycarbonyl, an ethoxycarbonyl, an n-propoxycarbonyl, an isopropoxycarbonyl, an n-butoxycarbonyl, an isobutoxycarbonyl, a sec-butoxy- 20 carbonyl or a tert-butoxycarbonyl; and (C.-C,)-cycloalkoxycarbonyl is understood as meaning for example a cyclopropoxycarbonyl, a cyclobutoxycarbonyl, a cyclopentoxycarbonyl, a cyclohexyloxycarbonyl or a cycloheptyloxycarbonyl.

Advantageously, the radical Z is a phenyl which is unsubstituted or monosubstituted or polysubstituted by a halogen atom, more particularly a chlorine, fluorine or iodine atom, a trifluoromethyl, a alkyl, a hydroxyl or a (C.-C,)-alkoxy; a naphthyl which is unsubstituted or monosubstituted or polysubstituted by a halogen, a trifluoromethyl, a (C,-C 4 )-alkyl, a hydroxyl or a (C,-C,)-alkoxy; a pyridyl; a thienyl; an indolyl; a quinolyl; a benzothienyl; or an imidazolyl.

According to the present invention, the preferred compounds are those of formula in which: 14 A is a divalent radical selected from: AX) -0-CO-

-CH.

2 -0-CO-

-O-CH

2

,-CO-

-O-CH,-CH

2

-N(R.

1

)-CH,

2

-CH

2 in which: is a hydrogen or a (C,-C,)-alkyl; and Amt is: i either a group Am, of the formula 1/N in which J. is: either a group Ar2-N-CHin which: Ar 2 is a pyridyl; or a phenyl which is unsubstituted or monosubstituted or polysubstituted by a substituent selected from a halogen atom, a hydroxyl, a

(C

1 ,-C,)-alkoxy, a (C,-C,)-alkyl and a trifluoromethyl, said substituents being identical or different; and

R

2 is a hydrogen; a (C,-C,)-alkyl; a benzyl; a formyl; or a (C 1 -C.,)-alkylcarbonyl; S- or a group 15 Ar 2

-(CH

2

_C'

R

3 in which: -Ar 2 is as defined above; :4.00. n isO0 or 1; R .R is a hydrogen; a (C,-C,)-alkyl; a formyl; a 0 7 )-alkylcarbonyl; a cyano; a group a group (C,-C,)-alkyl-O-(CH 2 a group HC00-(CH)q; a group (C,-C.)-alkyl-COO-(CH,)q-; a group 7 alkyl-NHCOO-(CH.)q,-; a group -NRR, 5 a group

NR

6

,COR

7 a group -(CH,),-NRCOOR,; a group NR 4Sso 2 a group -(CH 2 )qNRCONR,,R,,; a group -CH 2

NRX

2 a group -CH,-CH 2 -NR 1 2 a carboxyl; a C,)-alkoxycarbonyl; a group -CONR, a carboxymethyl; a (C,-C,)-alkoxycarbonylmethyl; a group -CH 2 CONR 3 0

R

1 or a 2-aminothiazol-4-yl in which the amino is free or substituted by one or two alkyls; or R 3constitutes a double bond between the carbon atom to which it is bonded and the adjacent carbon atom of the piperidine ring; q is 0, 1 or 2; R, and R 5 are each independently a hydrogen or a

C.

7 )-alkyl; R, can also be a (C 3

-C

7 )-cycloalkylmethyl, a benzyl or a phenyl; or R, and together with the nitrogen atom to which they are bonded, form a heterocycle selected from azetidine, pyrrolidine, piperidine, morpholine, thiomorpholine and perhydroazepine; R. is a hydrogen or a (C,-C,)-alkyl; R 7 is a hydrogen; a (C,-C,)-alkyl; a vinyl; a phenyl; a benzyl; a pyridyl; or a (C 3 ,-C,)-cycloalkyl which is unsubstituted or substituted by one or more methyls; 16 -or R45 and R, 7 together are a group -p is 3 or 4; is a (C,-C,)-alkyl or a phenyl; R R 9 is a (0 1

-C.

7 )-alkyl; an amino which is free or substituted by one or two (C,-C,)-alky15; or a phenyl which is unsubstituted or monosubstituted or polysubstituted by a substituent selected from a halogen atom, a (C.-C,)-alkyl, a trifluoromethyl, a hydroxyl, a 7 )-alkoxy, a carboxyl, a (C, 1 -C,)-alkoxycar- 10 bonyl, a (C 1

-C.

7 )-alkylcarboflloxy, a cyano, a nitro and an amino which is free or substituted by one or two (C 3.-C.

7 )-alkyls, said substituents being identical or different; -RX, and R 3-3 are each independently a hydrogen or a

(C,

1 -C,)-alkyl; can also be a (C 3 C,)'cycloalkyl, a (C 3 7 )cycloalkylmethyl, a yrxl alkoxy, a benzyl or a phenyl; or and together with the nitrogen atom to which they are bonded, form a heterocycle selected from azetidine, pyrrolidine, piperidine, morpholine, thiomorpholine and perhydroazepine; and -X R 2 and R,_ 3 are each independently a hydrogen or a 7 )-alkyl; R X 3 can also be a (C 3 -C.,)-cycloalkylmethyl or a benzyl; i 3 or a group in which: R. is as defined above; is a (C,-C,)-alkyl or a (C 3 -C4 -cycloalkyl;

R,,

can also be either a group -CONR,,R,, if R3 is hydrogen, or a group -NR,-R, 1 6 if R 3 is a cyano, 17 a carboxyl, a (C 1 -C,)-alkoxycarbonyl or a group -CONR3oR 11 and R and R are each independently a (C 1 -C,)-alkyl; or R and R together with the nitrogen atom to which they are bonded, form a heterocycle selected from azetidine, pyrrolidine, piperidine, morpholine, thiomorpholine and perhydroazepine; ii or a group Am, of the formula J N- *in which J 2 is: in which: Ar, is a phenyl which is unsubstituted or monosubstituted or polysubstituted by a substituent selected from a halogen atom, a hydroxyl, a (C,-C,)-alkoxy, a (C,-C,)-alkyl and a trifluoromethyl, said substituents being identical or different; and R, is as defined above for J.; ii, or a group Ar 3

-(CH

2

)-CH-

in which: Ar, is as defined above; n is 0 or 1; Q is a (C-C)-alkyl or a benzyl, said substituent being either in the axial position or in the equatorial position; and torial position; and 18 Xe is an anion; iii or a group Am, of the formula Ar 2

-(CH

2 )n Nx0 Xo in which: Ar 2 is as defined above; n is 0 or 1; and Xe is an anion; iv or a group Am 4 of the formula

N-

15 Ar -(CH 2 )n X O in which: Ar, is as defined above; n is 0 or 1; Xe is an anion; m is 2 or 3; Ar. is a phenyl which is unsubstituted or monosubstituted or polysubstituted by a substituent selected from a halogen atom, a hydroxyl, a (C,-C 4 )-alkoxy, a (C -C 4 )-alkyl and a trifluoromethyl, said substituents being identical or different; a thienyl; a benzothienyl; a naphthyl; or an indolyl which is unsubstituted or N-substituted by a (C,-C 4 )-alkyl or a benzyl; T is a group selected from -CH 2

-CH(C

6 and

-C(C

6

H,)

3 T can also be the group -CO-B-Z if A is a divalent radical selected from -O-CH,-CH 2 and B is a direct bond or a methylene; and Z is: 19 a phenyl which is unsubstituted or monosubstituted or polysubstituted by a substituent selected f rom a halogen atom; a trifluoromethyl; a cyano; a hydroxyl; a nitro; a phenyl which is unsubstituted or monosubstituted or polysubstituted by a halogen, a trifluoromethyl, a (C,-C,)-alkyl, a hydroxyl or a (C.

1 C,)-alkoxy, said substituents being identical or different; an amino which is unsubstituted or monosubstituted or disubstituted by a a benzylamino; a carboxyl; a a cycloalkyl which is unsubstituted or monosubstituted or polysubstituted by a methyl; a (C,-C,,)-alkoxy; a (C,-C,)-cycloalkoxy which is unsubstituted or mono- *:substituted or polysubstituted by a methyl; a mercapto; a (C,-C,,)-alkylthio; a (C,-C,)-alkylcarbonyloxy; a (C,-C,)-alkylcarbonylamilo; a benzoylamilo; a

(C,-C

4 ,)-alkoxycarbonyl; a 7 )-cycloalkylcarbofl; a carbamoyl which is unsubstituted or monosubstituted or disubstituted by a a ureido which is unsubstituted or monosubstituted or disubstituted in the 3-position by a (C,-C,)-alkyl or a (C 3 cycloalkyl; and a (pyrrolidin-1-yl)carbonylamilo, said substituents being identical or different; a naphthyl which is unsubstituted or monosubstituted or polysubstituted by a halogen, a trifluoromethyl, a (C,-C,)-alkyl, a hydroxyl or a alkoxy; or a pyridyl, a thienyl, an indolyl, a quinolyl, a benzothienyl or an imidazolyl; and the salts thereof, where appropriate, with mineral or organic acids.

The compounds also preferred are those of formula in which: A is a divalent radical selected from: AX) -0-CO-

_I

20

-CH

2

-O-CO-

A

3

-O-CH,-CO-

A

4

-O-CH,-CH,-

-N(R

1

)-CO-

A

6 -N(R )-CO-CO-

A

7

-N(R

1 in which R. is a hydrogen or a (C,-C 4 )-alkyl; m is 2 or 3; S- ArX is a phenyl which is unsubstituted or monosubsti- 10 tuted or polysubstituted by a substituent selected from a halogen atom, a hydroxyl, a (C,-C,)-alkoxy, a (C -C 4 )-alkyl, a trifluoromethyl and a methylenedioxy, said substituents being identical or different; a thienyl which is unsubstituted or substituted by a halogen atom; a benzothienyl which is unsubsti- S. tuted or substituted by a halogen atom; a naphthyl which is unsubstituted or substituted by a halogen atom; an indolyl which is unsubstituted or N-substituted by a (C -C 4 )-alkyl or a benzyl; an imidazolyl 20 which is unsubstituted or substituted by a halogen atom; a pyridyl which is unsubstituted or substituted by a halogen atom; or a biphenyl; T is a group selected from CH,-Z, -CH(C 6 and

-C(C

6

H,)

3 T can also be the group -CO-B-Z if A is a divalent radical selected from -O-CH,-CH 2 and

-N(R,)-CH

2 B is a direct bond or a methylene; Z is an optionally substituted mono-, di- or tricyclic aromatic or heteroaromatic group; and Am is: i either a group Am, of the formula J N- 21 in which J. is: -either a group Ar 2-N-CH- 211

R

in which: -Ar 2 is a pyridyl; a phenyl which is unsubstituted or monosubstituted or polysubstituted by a substituent selected from a halogen atom, a hydroxyl, a alkoxy, a (C 1 -C,)-alkyl, a trifluoromethyl, a nitro and a methylenedioxy, said substituents being identical or different; a thienyl; a pyrimidyl; or an imidazolyl which is unsubstituted or substituted by a (C.-C,)-alkyl; and

-R

2 is a hydrogen; a a benzyl; a formyl; or a (cC.C)-alkylcarboflyl; i2 or agroup Ar 2 -(lCI- 2 )n -C in which: Ar 2 is as defined above; n is 0 or 1; and R, is a group selected from: hydrogen; (C,-C,)-alkyl; formyl; (C,-C,)-alkylcarbonyl; cyano;

-(CH

2

-(CH

2 )q,-OCHO; 22

-(CH

2 ,)q-0C0R,,;

-(CH-

2 ),,-oCoNH-(Ci-C,)-alkyl; (11) -NRR,; (12) -(CH.

2 (13) (14) -(CH 2 )q-NR,,S0 2

R

-(CH.

2 ),qNR.C(=W,)NRoR:1

I

-CH

2

-NRX

2 R 2 3 (17) -CH 2 -CH 2 -NR 12 (18) -COGH; (19) (CX-C 7 -alkoxycarbofl;

-C(=W

1

)NR

10

,R,

11 (21) -CH.

2

-COOH;

(22) (C,-C,)-alkoxycarbony1Thethyl; (23) -CH 2 -C(=W,)NR10

R

11 (24) -O-CH 2 CH 2 -NRCOCOR, 9 (26) -CO-NR 2 R2 (27) P-2 3 S

NR

24

RI

(28) N NH or constitutes a double bond between the carbon atom to which it is bonded and the adjacent carbon atom of the piperidine ring; q is 0, 1 or 2; W is an oxygen atom or a sulfur atom; 23 R 4 and R are each independently a hydrogen or a C,)-alkyl; R, can also be a (c 3 7 )-cycloalkylmethyl, a benzyl or a phenyl; or R 4 and together with the nitrogen atom to which they are bonded, form a heterocycle selected from azetidine, pyrrolidile, piperidine, morpholine, thiomorpholine, perhydroazepine and piperazine which is unsubstituted or substituted in the 4-position by a (C,-C,)-alkyl;

R

6 is a hydrogen or a (CC 4 )-alkyl; R7 is a hydrogen; a (C,-C,)-alkyl; a vinyl; a phenyl; a benzyl; a pyridyl; a (C 3 ,-C.,-cycloalkyl which is O S unsubstituted or substituted by one or more methyls; furyl; a thienyl; a pyrrolyl; or an imidazolyl; or and R. together are a group-(H); pis 3or 4; R. is a (C,-C,)-alkyl or a phenyl;

R

9 is a 7 )-alkyl; an amino which is free or substituted by one or two (C,-C,)-alkyls; or a phenyl which is unsubstituted or monosubstituted or polysubstituted by a substituent selected from a halogen atom, a (C,-C,)-alkyl, a trifluoromethyl, a hydroxyl, a 7 )-alkoxy, a carboxyl, a 7 )-alkoxycarbonyl, a (C,-C,)-alkylcarbonyloxy, a cyano, a nitro and an amino which is free or substituted by one or two (C.

1 -C.,)-alkyls, said substituents being identical or different; and R 2. are each independently a hydrogen or a

(C

1 -C,)-alkyl; can also be a (C 3 ,-C,)-cycloalkyl, a (C,-C.,)-cycloalkylmethyl, a hydroxyl, a 4 alkoxy, a benzyl or a phenyl; or and together with the nitrogen atom to which they are bonded, form a heterocycle selected from azetidine, pyrrolidine, piperidine, morpholine, thiomorpholine and perhydroazepine; R X 2 and R, 3 are each independently a hydrogen or a 24 can also be a (C,-C.)-cycloalkYlmethyl or a benzyl; R 3 is a (C,-C,)-alkyl; a (C,-C.,-cycloalkyl which is unsubstituted or substituted by one or more methyls; a phenyl; or a pyridyl; R 2 8 is a hydrogen; a 7 )-alkyl; a formyl; or a

(C

1 -alkylcarbonyl; R X 9 is a (CX-C,)-alkoxy; R 2 is a hydrogen or a (C,-C..)-alkyl; *10 R 21 and R 2 2 are each independently a hydrogen or a logo

(C

1 C,)-alkyl; or alternatively and R 2 2 together with the nitrogen atom to which they are bonded, form a 22 heterocycle selected from pyrrolidine, piperidine and morpholine; R 2 is a hydrogen or a (C,-C,)-alkyl; and R 24 and R 2 are each independently a hydrogen or a (C 1

-C.

7 )-alkyl; R2 can also be a formyl or a (C X-C 7 alkylcarbonyl; i3 or a group *R in which: R, is as defined above; R 3 4 is a (C 1 ,-C,)-alkyl or a (C.-C.,)-cycloalkyl; R,, can also be either a group -C0NR 15 ,R2 16 i f R 3 i s hydrogen, or a group -NR 35RXC 6 if R 3 is a cyano, a carboxyl, a (c,-C.,)-alkoxycarbonyl or a group 0 and R 3 5 and R.

6 are each independently a (C,-C,)-alkyl; or R 2 5 and R 2-45 together with the nitrogen atom to which they are bonded, form a heterocycle selected 25 from azetidine, pyrrolidine, piperidine, morpholine, thiomorpholine and perhydroazepine; ii or a group Am, of the formula

Q

J N- XG x0 in which J 2 is: ii, either a group Ar 3

-N-CH-

15 in which: Ar 3 is a phenyl which is unsubstituted or monosubstituted or polysubstituted by a substituent selected from a halogen atom, a hydroxyl, a (C,-C 4 )-alkoxy, a

(C

1

-C

4 )-alkyl and a trifluoromethyl, said substi- 20 tuents being identical or different; and R, is as defined above for J 1 S: ii, or a group Ar 3 -(CH2)n-CH- 25 in which: Ar, is as defined above; n is 0 or 1; Q is a (C 1 -C,)-alkyl or a benzyl, said substituent being either in the axial position or in the equatorial position; and Xe is an anion; iii or a group Am 3 of the formula 26 Ar 2

-(CH

2 Nx0 in which: Ar 2 is as defined above; n is 0 or 1; and Xe is an anion; iv or a group Am 4 of the formula

N-

N XQ :"in which: 15 Ar, is as defined above; n is 0 or 1; and Q. 00 S: X is an anion; and the salts thereof, where appropriate, with mineral or organic acids.

20 Another group of preferred compounds according to the present invention consists of those of the formula ,Aa Ama-CH-CH-- CCH 2

-CH

2 -Za (Ia) 25 Ar, in which: Aa is a divalent radical selected from -CH,- O-CO-; -O-CH -N(R and -N(R )-CO-CO-, in which R, is a hydrogen or a (C,-C,)-alkyl; Am. is: either a group Am 2 of the formula 27 Ar3 -(CH 2 )n Nx® or a group Am, of the formula Ar-(CH)n-

N-

n is 0 or 1; Q is as defined above for a compound of formula (I) and is in the axial position; Xe is a pharmaceutically acceptable anion; Ar 2 and Ar 3 are as defined above for a compound of 15 formula Aria is a phenyl which is unsubstituted or monosubstituted or polysubstituted by a substituent selected from a halogen atom, a hydroxyl, a (C,-C 4 )-alkoxy, a

(C,-C

4 )-alkyl and a trifluoromethyl, said substi- 20 tuents being identical or different; and Za is a phenyl which is unsubstituted or monosubstituted or polysubstituted by a substituent selected from a halogen atom, a trifluoromethyl, a (C,-Cxo)alkyl, a (C,-Cxo)-alkoxy and a hydroxyl, said substi- 25 tuents being identical or different.

Among these compounds, those of the formula Ama-CH-CH 2 -C-CH2-N-CH2-Z'a (I'a) Ar'l, in which: Aa and Am. are as defined above for a compound of formula (Ia); Ar' a is a 3,4-dichlorophenyl or a 3,4-difluoro- 28 phenyl; and Z'a is a 3,5-bis(trifluoromethyl)phelYl, a dimethyiphenyl or a 2, 4-bis (trif luoromethyl )phenyl, are particularly preferred.

Another group of preferred compounds according to the invention consists of those of the formula Amb\CH- 2 2

CH

2 -C NCOCH 2 -Za (Ib) Aria in which: -Ab is the divalent radical 2 CH. or -O-CH 2 in which is a hydrogen or a 4 .)-alkyl; is: either a group Am,. of the formula

Q

xo or a group Am, of the formula Ar (CH 2

)N

or a group of the formula Ar2- (CH2)- Nn is 0 or 1; Q is as defined above for a compound of formula (I) 29 and is in the axial position; X is a pharmaceutically acceptable anion; Ar 2 Ar 3 and R 3 are as defined above for a compound of formula and Ar. and Za are as defined above; and the salts thereof with mineral or organic acids.

Among these compounds, those of the formula A'b Am-CH,-CH 2 -C-CH-N-CO-CH2-Z"a (I'b) Ar' a la in which: Am, is as defined above for a compound of formula i 15 (Ib); 7. A'b is the divalent radical -O-CH,-CH 2 or -N(R

CH

2

-CH

2 Ar' is as defined above for a compound of formula and 20 Z"a is a phenyl substituted in the 3-position by a halogen or a (C.-Co)-alkoxy group, and the salts thereof with mineral or organic acids, are particularly preferred.

Another group of preferred compounds according 25 to the invention consists of those of the formula /Ac Am-CH-CH-C-CH 2

-N-CH

2 -Za Ic) Ar Arla in which: Ac is a divalent radical selected from -O-CH 2

-CO-;

-CH,-O-CO- and -0-CO-; Am. is a group Am,, of the formula 30 Ar 2 Nn is 0 or 1; Ar 2 and R 3 are as defined above for a compound of formula and Ar and Za are as defined above; and the salts thereof with mineral or organic acids.

Among these compounds, those of the formula Ame-CH 2

-CH

2

CH

2 N-CHi (I'c) 'I -a 15 in which: Ac, Am. and Ar' 1 are as defined above, and the salts thereof with mineral or organic acids, are particularly preferred.

Another group of preferred compounds according to the invention consists of those of the formula Ab Am -CH 2

-CH

2

,--CH

2 -N-CO-Za (Id) Aria in which: Ab, Am,, Ar 1 and Za are as defined above; and the salts thereof with mineral or organic acids.

Among these compounds, those of the formula A'b Am,-CH 2

-CH

2

-C-CH

2 -N-CO (I'd) Ar'a Ia in which: 31 Ab, Am,= and Ar' 3.9 are as defined above, and the salts thereof with mineral or organic acids, are particularly preferred.

Among the compounds of formulae (Ia) and (Ila) above, those in which: Ar 2 is a pyridyl or a phenyl which is unsubstituted or monosubstituted or polysubstituted by a substituent selected from a halogen atom, a hydroxyl, a (Cl-C 4 )-alkoxy, a (Cl-C 4 )-alkyl and a trifluoromethyl, said substituents being identical or different; and the salts thereof with mineral or organic acids are particularly preferred.

Among the compounds of formulae (Ic), and above, those in which: Ar 2 is a pyridyl; or a phenyl which is unsubstituted **or monosubstituted or polysubstituted by a substituent selected from a halogen atom, a hydroxyl, a (Cl-C 4 )-alkoxy, a (Cl-C 4 )-alkyl and a trifluoromethyl, said substituents being identical or 20 different and is a hydrogen; a 7 )-alkyl; a formyl; a C,)-alkylcarbonyl; a cyano; a group a group a group HCOO-(CH 2 a group alkyl -COO- a group alkyl-NHCOO-(CH 2 a group -NRR,; a group NR,,COR,; a group 6 COOR,; a group

NRC

6 SO 2 a group -(CH 2 )qc- NR,CONR,,Ri; a group -CH.- NR3 2 a group -CH.-CH 2 -NR 3 2 R 3 a carboxyl; a C,)-alkoxycarbonyl; a group -CONR 1 0 .R a carboxymethyl; a (C 1 -C.,)-alkoxycarboflmethyl; a group CONR 3 0 R or a 2-aminothiazol-4-yl in which the amino is free or substituted by one or two(C-.) alkyls; or R 3 constitutes a double bond between the carbon atom to which it is bonded and the adjacent carbon atom of the piperidifle ring; q is 0, 1 or 2; and the salts thereof, with mineral or organic acids, are particularly preferred.

31a Among the compounds of formulae (Ib) and (Id), those in which: Ab is the divalent radical -O-CH 2

-CH

2 or NR)C2

CH

2 Ar 2 is a pyridyl or a phenyl which is unsubstituted or monosubstituted or polysubstituted by a substituent selected from a halogen atom, a hydroxyl, a (Cl-C 4 )-alkoxy, a (Cl-C 4 )-alkyl and a trifluoromethyl, said substituents being identical or different and is a hydrogen; a (C,-C,)-alkYl; a formyl; a

C.

7 )-alkyicarbol; a cyano; a group -(CH 2 a group a group HCOO-(CH,) a group (C,-C.,)-alky-COOICH,)q,- a group (C, 1 alkyl-NHCOO-(CH,),q; a group -NRR.; a group

NR,

6

CQR

7 a group -(CH 2 )q,,NRCOOR,; a group -(CH 2q *NR 6 SO R a group -(CH 2 )q,-NRCONR 10 a group -CH 2 NR 3 2 R 3. a group -CH 2 -CH.-NR,,R a carboxyl; a C,)-aikoxyCarbofl; a group a carboxymethyl; a (C,-C,)-aJ-koxycarbolmrethyl; a group -CH,-

CONR,

1 0 R or a 2-aminothiazoJl-4-yl in which the amino is free or substituted by one or two alkyls; or R 3 constitutes a double bond between the carbon atom to which it is bonded and the adjacent carbon atom of the piperidine ring; q is 0, 1 or 2 and the salts thereof, with mineral or organic acids, are particularly preferred.

Another group of preferred compounds according to the invention consists of those of the formula AmC-HC-C C--OZ (Ie) C 2 2 2 1 2 in which Aria Ab, Amcp Aria and Za are as defined above; and the salts thereof with mineral or organic acids.

Another group of preferred compounds according to the invention consists of those of the formula: 31b /-Aa( Am--CH-CH-CH-C-CHCHN-CHZa (If) Arl.

in which Aa, Amc, Arla and Za are as defined above and the salts thereof with mineral or organic acids.

4-Benzoyl-2-(3,4-difluorophenyl)-2-[2-[4-(N',N'dimethylureido)-4-phenylpiperid-l-yl]ethyl]morpholine, in optically pure form, preferably in the form of the isomer, and the salts thereof with mineral or organic acids, are very particularly preferred.

5-(3,4-Difluorophenyl)-5-[2-[4-phenyl-l-azonia- 5 bicyclo[2.2.2]oct-1-yl]ethyl]-3-[3,5-bis(trifluoromethyl)benzyl]oxazolidin-2-one with a pharmaceutically acceptable anion, in optically pure form, preferably in the form of the isomer, is very particularly preferred.

According to another of its features, the present invention relates to a method of preparing the compounds of formula and the salts thereof, which comprises: 1) treating a compound of the formula E-O-(CH2)m-C-CH-NH (II) Ar, in which m, Ar 1 and A are as defined above for a compound of formula and E is hydrogen or an 0protecting group, either with a functional derivative of an acid of the formula HOCO-B-Z

(III)

in which B and Z are as defined above for if it is intended to prepare a compound of formula in which T is -CO-B-Z, or with a halogenated derivative of the formula Hal-CH 2 -Z

(IV)

in which Z is as defined above and Hal is a halogen, preferably bromine or chlorine, if it is intended to prepare a compound of formula in which T is -CH,-Z, or with a halogenated derivative of the formula Hal-CH(CH,),

(V)

if it is intended to prepare a compound of formula

(I)

15 in which T is a group or with a halogenated derivative of the formula

(VI)

if it is intended to prepare a compound of formula

(I)

in which T is a group to give a compound of the formula

A

E-O-(CH,)C-C-CIH-N-T

(VII)

25 Ar 2) optionally removing the O-protecting group by reaction with an acid or a base to give the alcohol of the formula

A

HO-(CHI)m--CCH--N-T

(VIII)

Ar, 3) treating the alcohol (VIII) with a compound of the formula 33 Y-SO,-Cl

(IX)

in which Y is a methyl, phenyl, tolyl or trifluoromethyl group, to give a compound of the formula

A

Y-SO,-0-(CH2)m-C-CH -N-T

(X)

Ar, 4) reacting the compound either with a cyclic secondary amine of the formula

J(XI)

N H 15 in which J' 1 is: either a group Ar 2

-N-CH-

R'

in which Ar 2 is as defined for and R' 2 is either R 2 as defined for or a precursor of R,; or a group 25 Ar 2

-(CH

2

)C

3 in which Ar 2 and n are as defined for and R' 3 is either R, as defined for or a precursor of it being understood that if is a hydroxyl or an amino, these groups can be protected; or a group 34 in which R 4 is as defined for and R' 3 is as defined above; or with a tertiary amine of the formula

(XII)

J

N-Q

in which J 2 and Q are as defined for or with a cyclic tertiary amine of the formula Ar 2

-(CH

2 N

(XIII)

15 in which Ar, and n are as defined for or with a compound of the formula SN

(XIV)

Ar 2

-(CH

2 in which Ar 2 and n are as defined for and either, in the case where a cyclic secondary amine of formula (XI) is used, and after deprotec- 25 tion of the hydroxyl group or the amino group represented by if appropriate, or optional conversion of to R 2 or R' 3 to R 3 optionally converting the resulting product to a salt thereof; or, in the case where a tertiary amine of formula (XII), a cyclic tertiary amine of formula (XIII) or a compound of formula (XIV) is used, isolating the resulting product in the form of a sulfonate and, if appropriate, a sulfonic acid salt, or optionally exchanging the resulting anion and, if appropriate, acid salt with another pharmaceutically accep- 35 table anion and, if appropriate, another salt with a pharmaceutically acceptable mineral or organic acid.

In one variant of the method, if Am is a group Am., a compound of formula (VIII) as defined above is oxidized to give a compound of the formula 0

A

o11

(XXXVIII)

H-C-(CH

2 )m-C-CH 2 -N-T

(XXXVIII)

Ar, in which m, Ar 1 A and T are as defined for a compound *of formula 15 the compound of formula (XXXVIII) is reacted with a compound of formula (XI) as defined above, in the presence of an acid, and the iminium salt formed as an intermediate is then reduced by means of a reducing agent; and 20 after deprotection of the hydroxyl groups or amino groups, if appropriate, or optional conversion of to R, or R' 3 to the resulting product is optionally converted to a salt thereof.

The compounds of the formula -C-CH-NH (I Ar, in enantiomerically pure form or in racemic form are novel and form part of the invention.

The compounds of the formula 36

A

-C-CH-N-T

(VII)

Ar 1 in enantiomerically pure form or in racemic form are novel and form part of the invention.

The compounds of formulae (II) and (VII) in which E is hydrogen are particularly preferred.

The compounds of the formula

A

Y-SO,-O-(CH)m-C-CH,-N-T Ar, 15 in enantiomerically pure form or in racemic form are novel and form part of the invention.

The compounds of the formula 0 A 20 H-C-(CH,),m-C-CH2-N-T

(XXXVIII)

Ar, in enantiomerically pure form or in racemic form are 25 novel and form part of the invention.

In formulae (VII), and (XXXVIII), m and the groups E, A, Ar,, T and Y are as defined above.

Thus, according to another of its features, the present invention relates to compounds of the formula Ri A 2

(XXXIX)

Ar, 37 in which: m, Ar 1 and A are as defined for a compound of formula RT is two hydrogen atoms and is: either a group in which E is a hydrogen atom or an O-protecting group, or a group in which Y is a methyl, phenyl, tolyl or trifluoromethyl group; or alternatively

R

1 is an oxygen atom and is a hydrogen atom; and T' is T as defined for a compound of formula

T'

can also be hydrogen if R, is 2 hydrogen atoms and Rx is simultaneously a group in enantiomerically pure form or in racemic form.

15 Thus, if E is an O-protecting group, this is selected from the conventional O-protecting groups well known to those skilled in the art, such as, for example, tetrahydropyran-2-yl, benzoyl or a (C -C 4 )-alkylcarbonyl.

20 The O-protecting groups which may be used to obtain a compound of formula in which R, is a hydroxyl are the conventional O-protecting groups well known to those skilled in the art, as defined above for

E.

25 The N-protecting groups which may be used to obtain a compound of formula in which R, is an amino are the conventional N-protecting groups well known to those skilled in the art, such as, for example, the trityl, methoxytrityl, tert-butoxycarbonyl or benzyloxycarbonyl group.

In particular, if the O-protecting group used is an acetyl group, the compound of formula obtained represents the final product in which R, is an acetoxy, or if the N-protecting group used is a tertbutoxycarbonyl group, the compound of formula (I) 38 obtained represents the final product in which R, is a tert-butoxycarbonylamino.

In step the functional derivative of the acid (III) used is the acid itself or alternatively one of the functional derivatives which react with amines, for example an anhydride, a mixed anhydride, the acid chloride or an activated ester such as the paranitrophenyl ester.

If the acid of formula (III) itself is used, 10 the reaction is carried out in the presence of a coupling agent used in peptide chemistry, such as 1,3dicyclohexylcarbodiimide or benzotriazol-1-yloxytris- (dimethylamino)phosphonium hexafluorophosphate, in the presence of a base such as triethylamine or N,N-diiso- 1. 5 propylethylamine, in an inert solvent such as dichloro- *methane or N,N-dimethylformamide, at a temperature between O°C and room temperature.

If an acid chloride is used, the reaction is carried out in an inert solvent such as dichloromethane or benzene, in the presence of a base such as triethylamine or N-methylmorpholine, and at a temperature between -60°C and room temperature.

If a halogenated derivative of formula (IV), or (VI) is used, the reaction is carried out in an inert solvent such as tetrahydrofuran, N,N-dimethylformamide or dimethyl sulfoxide, in the presence of a base such as potassium tert-butylate, sodium hydride or lithium diisopropylamide, and at a temperature between 0°C and The resulting compound of formula (VII) is deprotected in step if appropriate, by the methods known to those skilled in the art. For example, if E is a tetrahydropyran-2-yl group, the deprotection is effected by acid hydrolysis using hydrochloric acid in a solvent such as ether or methanol or a mixture of 39 these solvents, or using pyridinium p-toluenesulfonate in a solvent such as methanol, or else using an Amberlyst® resin in a solvent such as methanol. The reaction is carried out at a temperature between room temperature and the reflux temperature of the solvent.

If E is a benzoyl group or a (C-C 4 )-alkylcarbonyl group, the deprotection is effected by hydrolysis in an alkaline medium using for example an alkali metal hydroxide such as sodium hydroxide, potassium hydroxide 10 or lithium hydroxide, in an inert solvent such as .water, methanol, ethanol or dioxane or a mixture of these solvents, at a temperature between 0°C and the reflux temperature of the solvent.

In step the reaction of the alcohol of 15 formula (VIII) with a sulfonyl chloride of formula (IX) is carried out in the presence of a base such as triethylamine, pyridine, N,N-diisopropylethylamine or N-methylmorpholine, in an inert solvent such as dichloromethane, benzene or toluene, at a temperature between -20°C and the reflux temperature of the solvent.

The resulting compound of formula is reacted in step 4) with a compound of formula (XI), (XII), (XIII) or (XIV) by different procedures.

If a compound of formula is reacted with a compound of formula the reaction is carried out in an inert solvent such as N,N-dimethylformamide, acetonitrile, methylene chloride, toluene or isopropanol, and in the presence or absence of a base. If a base is used, this is selected from organic bases such as triethylamine, N,N-diisopropylethylamine and Nmethylmorpholine, or from alkali metal carbonates or bicarbonates such as potassium carbonate, sodium carbonate and sodium bicarbonate. In the absence of a base, the reaction is carried out using an excess of 40 the compound of formula (XI) and in the presence of an alkali metal iodide such as potassium iodide or sodium iodide. If in the compound of formula is the divalent radical -O-CO- or -CH 2 the reaction is carried out at a temperature between room temperature and 80°C. If in the compound of formula is the divalent radical -O-CH 2

-CH

2

-N(R

1

)-CO-

CO-, -N(R )-CH 2 or -O-CH 2 the reaction is carried out at a temperature between room 10 temperature and 100C.

If a compound of formula is reacted with a compound of formula (XII) or (XIII), the reaction is carried out in a polar aprotic solvent such as acetonitrile, N,N-dimethylformamide or N,N-dimethylphenyl- 15 acetamide, in an ether such as tetrahydrofuran, dioxane or methyl tert-butyl ether, or in a ketone such as methyl ethyl ketone. If in the compound of formula is the divalent radical -O-CO- or -CH 2 the reaction is carried out at a temperature between room temperature and 60*C. If in the compound of formula is the divalent radical -O-CH 2

-O-CH,-

CH

2

-N(R

1

-N(R

1

)-CH

2

-CH

2 or -0-

CH

2 the reaction is carried out at a temperature between room temperature and 100'C.

If a compound of formula is reacted with a compound of formula (XIV), the reaction is carried out in a polar aprotic solvent such as acetonitrile, N,Ndimethylformamide or N,N-dimethylphenylacetamide, in an ether such as tetrahydrofuran, dioxane or methyl tertbutyl ether, or in a ketone such as methyl ethyl ketone. The reaction is carried out at a temperature between room temperature and 100°C.

In step of the variant of the method, an alcohol of formula (VIII) is oxidized to an aldehyde of formula (XXXVIII). The oxidation reaction is carried 41 out using for example oxalyl chloride, dimethyl sulfoxide and triethylamine in a solvent such as dichloromethane and at a temperature between -78°C and room temperature.

Then, in step the compound of formula (XI) is reacted with an aldehyde of formula (XXXVIII) in the presence of an acid such as acetic acid, in an alcoholic solvent such as methanol, to form in situ an intermediate imine, which is reduced chemically using 10 for example sodium cyanoborohydride, or catalytically using hydrogen and a catalyst such as palladium-oncharcoal or Raney® nickel.

The compounds of formula according to the invention are finally obtained after deprotection of 15 the hydroxyl groups or amino groups, if appropriate, or optional conversion of to R 2 and R' 3 to R 3 The resulting products of formula are: either isolated in the form of the free base or a salt, by the conventional techniques, if Am is Am,, or, if Am is Am 2 Am 3 or Am 4 isolated in the form of sulfonate anion (YSO 3 G or alternatively the sulfonate anion of the resulting quaternary salt is optionally exchanged with another pharmaceutically acceptable anion.

If the compound of formula in which Am is Am 1 is obtained in the form of the free base, salification is effected by treatment with the chosen acid in an organic solvent. Treatment of the free base, dissolved for example in an ether such as diethyl ether, in an alcohol such as propan-2-ol, in acetone or in dichloromethane, with a solution of the chosen acid in the same solvent gives the corresponding salt, which is isolated by the conventional techniques.

The hydrochloride, hydrobromide, sulfate, 61 SCHEME 8

OH

ArI a8 S- CH I: CH E Pr 2 -U 7

NH

Pr 2 NH

E

CH2 Ar 1 b8 0 CH 2 II E=H HO-(CH2)m-C\

NH

*CH

2 In step a8 of SCHEME 8, a compound of formula (XXVII) is reacted with aqueous formaldehyde solution in an inert solvent such as tetrahydrofuran, at a temperature between room temperature and the reflux temperature of the solvent, to give a compound of the expected formula (II) in which E is an O-protecting group.

Using the methods described above, the 0protecting group Pr, is removed by basic hydrolysis (step b8) to give the compound of formula (II) in which E is hydrogen.

The compounds of formulae (XVIII),

(XIX),

(XXIII), (XXIV), (XXVII), (XXXI), (XXX), (XXXII) and (XXXIII) and the compounds of formula (XXXIV), defined 62 below, are novel products which constitute the key intermediates for the preparation of the compounds of formula Thus the compounds of the formula

CH

2

-OH

E-O-(CH

2 )mC-L

(XXXV)

Ar, in which: m and Ar are as defined for a compound of formula 15 E is as defined for a compound of formula and L is a cyano group or an aminomethyl group, in enantiomerically pure form or in racemic form if L is an aminomethyl group, are novel and form part of the invention.

20 The compounds of the formula

O-G

E-O-(CH)m-C-L

(XXXVI)

Ar, in which: m, Ar E and L are as defined above; and G is a hydrogen or an O-protecting group, in enantiomerically pure form or in racemic form if L is an aminomethyl group, are novel and form part of the invention.

The compounds of the formula 63

M-N-R

1 E-O-(C-)mC-C-L

(XXXVII)

Ar, in which: m, Ar 1 E and L are as defined above;

R

1 is as defined for a compound of formula and M is a hydrogen or an N-protecting group, in enantiomerically pure form or in racemic form if L is an aminomethyl group, are novel and form part of the invention.

The compounds of formulae (XXXV), (XXXVI) and (XXXVII) are obtained by the methods described above.

More particularly, the deprotected compounds (E G M H) are obtained after removal of the O-protecting or N-protecting groups by the methods known to those skilled in the art.

20 Thus, according to another of its features, the present invention relates to compounds of the formula

D

E-O-(CHL)m-C-L

(XXXX)

Ar 1 in which: m is 2 or 3; Ar is a phenyl which is unsubstituted or monosubstituted or polysubstituted by a substituent selected from a halogen atom, a hydroxyl, a (Cl-C4)alkoxy, a (C 1

-C

4 )-alkyl, a trifluoromethyl and a methylenedioxy, said substituents being identical or P:\OPER\MKR\46669-96.DIV 18/5/99 63A different; a thienyl which is unsubstituted or substituted by a halogen atom; a benzothienyl which is unsubstituted or substituted by a halogen atom; a naphthyl which is unsubstituted or substituted by a halogen atom; an indolyl which is unsubstituted or Nsubstituted by a (C-C 4 )-alkyl or a benzyl; an imidazolyl which is unsubstituted or substituted by a halogen atom; a pyridyl which is unsubstituted or substituted by a halogen atom; or a biphenyl; E is a hydrogen or an O-protecting group; L is a cyano group or an aminomethyl group; D is a group selected from: a 6 e* 64

-CH

2 -OH,

M

G is a hydrogen or an O-protecting group; M is a hydrogen or an N-protecting group; and R is as defined for a compound of formula in enantiomerically pure form or in racemic form if L is an aminomethyl group.

The piperidines of formula (XI) are known or are prepared by known methods such as those described in EP-A-0428434, EP-A-0474561, EP-A-0512901 and EP-A- 0515240.

The piperidines of formula (XI) can also be prepared by methods well known to those skilled in the 15 art, such as those described in the following publications: J. Heterocyclic Chem., 1986, 21, 73-75 J. Chem. Soc., 1950, 1469 J. Chem. Soc., 1945, 917 20 J. Pharmaceutical Sci., 1972, 61, 1316-1317 J. Org. Chem., 1957, 22, 1484-1489 Chem. Ber., 1975, 108, 3475-3482.

The compounds of formula (XI) are generally prepared in a form protected on the piperidine nitrogen; the actual compounds of formula (XI) are obtained after a deprotection step.

More particularly, to prepare for example a compound of formula (XI) in which J' 1 is a group Ar 2

-(CH

2

-C

I

R'

3 in which Ar 2 is a pyrid-2-yl radical, n is zero and R', is a hydroxyl, 2-bromopyridine is reacted with 1benzylpiperid-4-one in the presence of a base such as 65 butyllithium. The expected 4-hydroxy-4-(pyrid-2-yl)piperidine is obtained after removal of the N-protecting group.

To prepare a compound of formula (XI) in which

R'

3 is a group -NRR, in which R 4 and R, are each hydrogen, a compound of formula (XI) in which is an acetamido group is hydrolyzed in an acid medium.

A compound of formula (XI) in which is a group -NR,R, in which R 4 and together with the nitrogen atom to which they are bonded, form a heterocycle is prepared by the application or adaptation of Bruylants' reaction (Bull. Soc. Chim. Belges, 1924, J3, 467 and Tetrahedron Letters, 1988, 29 6827-6830).

To prepare a compound of formula (XI) in which 15 R' 3 is a group -CH,-NR 1 2

R

13 in which R 12 and R 3 are each hydrogen, a compound of formula (XI) in which R' 3 is a cyano is reduced. This reduction is effected by the methods well known to those skilled in the art.

A compound of formula (XI) in which is a 20 group in which and R 3 are each a hydrogen is prepared from a compound of formula (XI) in which R' 3 is a group -CH,-CH,-OH by application or adaptation of the method described in J. Med. Chem., 1989, 32, 391-396.

25 A compound of formula (XI) in which is a group -NR 4 R, in which R 4 is a hydrogen and R 5 is a C,)-alkyl or, respectively, a (C 3 -C,)-cycloalkylmethyl or a benzyl can be prepared by reducing a compound of formula (XI) in which is a group -(CH 2

)-NR

6 COR, in which q is zero, R, is hydrogen and R, is a hydrogen or a (C,-C,)-alkyl or, respectively, a (C,-C,)-cycloalkyl or a phenyl. The reaction is carried out by means of a reducing agent such as lithium aluminum hydride, in a solvent such as tetrahydrofuran, at the reflux temperature of the solvent.

66 By an identical reaction, the compounds of formula (XI) in which is a group -NR 4 R, in which R 4 is a (C,-C,)-alkyl and R, is a (C-C,)-alkyl or, respectively, a (C,-C,)-cycloalkylmethyl or a benzyl can be prepared from a compound of formula (XI) in which

R'

3 is a group -NR 6 COR, in which q is zero, R 6 is a (C,-C,)-alkyl and R, is a hydrogen or a alkyl or, respectively, a (C,-C,)-cycloalkyl or a phenyl.

Likewise, the compounds of formula (XI) in which is a group -CH,-NR 2

,R,

1 or, respectively,

-CHCH

2

NR

1 2

R

1 3 in which R 2 is a hydrogen or a alkyl and is a (C,-C,)-alkyl, a (C,-C,)-cycloalkylmethyl or a benzyl can be prepared from a compound of 15 formula (XI) in which R' 3 is a group -(CH )q-NRGCOR, in which q is respectively 1 or 2, R 6 is a hydrogen or a (C -C,)-alkyl and R, is a hydrogen, a (C,-C,)-alkyl, a

(C

3 -C,)-cycloalkyl or a phenyl.

A compound of formula (XI) in which is a group -(CH,)q-NR 6 COR, in which R 6 and R 7 together are a group -(CH 2 3 or -(CH 2 is prepared by application or adaptation of the method described in J. Med. Chem., 1985, 28, 46-50.

The compounds of formula (XI) in which R' 3 is a 25 group 6 in which W 1 is an oxygen atom, q is 0, 1 or 2, R, is a hydrogen or a alkyl and R, is a hydrogen or, respectively, a alkyl, a phenyl, a benzyl, a pyridyl, an optionally substituted (C 3 -C,)-cycloalkyl, a furyl, a thienyl, a pyrrolyl or an imidazolyl are obtained by reacting formic acid in acetic anhydride or, respectively, the appropriate anhydride (R,CO),O or the appropriate acid chloride RCOC1, in the presence of a base such as triethylamine, with a compound of formula (XI) in which is a group -NHR 6 -CH,-NHR, or -CH 2

-CH,-NHR

6 66a Likewise, it is obvious for those skilled in the art that the compounds of formula (XI) in which R' 3 is a group -(CH 2 )q-NR6-C(=W1)R7 in which q, R 6 and W 1 are as defined above and R 7 is a vinyl group may be prepared by reaction with an acryloyl chloride.

Likewise, the compounds of formula (XI) in which is a group -(CH,)q-NRCOOR, are prepared by reaction of a compound of formula (XI) in which R' 3 is a group

-NHR

6

-CH

2

-NHR

6 or -CH 2

-CH

2 -NHR6 in the presence of a base such as triethylamine, with a chloroformate of the formula ClCOOR 8 The compounds of formula (XI) in which is a group

-(CH

2 )q-NR6SO2R9 are prepared by reaction of a 15 compound of formula (XI) in which R' 3 is a group -NHR 6

-CH

2 -NHR6 or -CH2-CH 2 -NHR6 in the presence of a base S* such as triethylamine, with a sulfonyl chloride of the S: formula ClSO 2 R9.

The compounds of formula (XI) in which is a 20 group )NRoR, in which Ro, is a hydrogen and W, is an oxygen atom are prepared by reaction of a compound of formula (XI) in which R'3 is a group

-NHR

6

-CH

2

-NHR

6 or -CH2-CH 2 -NHR6 in the presence of a base such as triethylamine, with an isocyanate of the formula R11N-CO0.

The compounds of formula (XI) in which is a group -(CH 2 )q-NRC(=W,)NRoR, in which R.o is a C,)-alkyl and W is an oxygen atom are prepared by reaction of a compound of formula (XI) in which R' 3 is a group -NHR 6

-CH

2

-NHR

6 or -CH 2 -CH2-NHR 6 in the presence of a base such as triethylamine, with a carbamoyl chloride of the formula ClCONRoR 11 67 A compound of formula (XI) in which is a group 6 CONRioRx can also be obtained by reacting a compound HNRR,, with a compound of formula (XI) in which is a group -(CH 2

),-NR

6 COOR. in which R. is a phenyl.

A compound of formula (XI) in which is a group -(CH,),-NRCOORa in which q 0 and R 6 is hydrogen can also be prepared by reacting a compound

ROH

with a compound of formula (XI) in which is an isocyanato group, -N=C=0.

A compound of formula (XI) in which is a group 6 CONRoR,, in which q 0 and R 6 is hydrogen can also be prepared by reacting a compound NHR,,R,3 with a compound of formula (XI) in which R', is an isocyanato group.

A compound of formula (XI) in which is an isocanato group is prepared from a compound of formula (XI) in which is a carboxyl by the method described in Organic Synthesis, 51, 48-52.

A compound of formula (XI) in which is a 68 group in which W, is a sulfur atom is obtained from a corresponding compound of formula (XI) which is protected on the piperidine nitrogen and in which W, is an oxygen atom by reaction with phosphorus pentasulfide or Lawesson's reagent, 2,4-bis(4methoxyphenyl)-1,3-dithia-2,4-diphosphetane 2,4-disulfide, followed by deprotection of the piperidine nitrogen.

A compound of formula (XI) in which is a group )NRoR,, in which W, is a sulfur atom is prepared by reacting a compound of formula

(XI)

which is protected on the piperidine nitrogen and in which R' 3 is a group -(CH,),-NRCONRoR,, with phosphorus pentasulfide or Lawesson's reagent.

15 A compound of formula (XI) in which is a group in which q is respectively one or two is prepared by reducing a compound of formula (XI) in which

R'

3 is respectively a methoxycarbonyl or a methoxycarbonylmethyl by the method described in Chem.

20 Ber., 1975, 108, 3475-3482.

The compounds of formula (XI) in which is a group -(CH,)q-OCOR,, are obtained by reacting an acid chloride R ,COC1 with the compounds of formula (XI) in which is a group in the presence of a 25 base such as triethylamine; the compounds of formula (XI) in which is a group HCOO-(CH,),- are obtained by reaction with formic acid.

The compounds of formula (XI) in which is a group (C,-C,)-alkyl-NHCOO-(CH,),- are obtained by reacting a carbamoyl chloride (C,-C,)-alkyl-NHCOCl with the compounds of formula (XI) in which R' 3 is a group -(CH,)q-OH.

The same compounds are prepared by reacting an isocyanate (C,-C,)-alkyl-N=C=O with the compounds of formula (XI) in which is a group 69 A compound of formula (XI) in which is a carboxyl can be prepared by hydrolyzing a compound of formula (XI) in which is a cyano by the methods known to those skilled in the art.

A compound of formula (XI) in which is a carboxymethyl can be prepared by the method described in Chem. Ber., 1975, 108, 3475-3482.

A compound of formula (XI) in which is respectively a (C,-C,)-alkoxycarbonyl or a alkoxycarbonylmethyl can be prepared from a compound of formula (XI) in which is respectively a carboxyl or a carboxymethyl by means of an esterification reaction using the methods well known to those skilled in the art.

15 To prepare a compound of formula (XI) in which J'1 is a group S in which Ar 2 is an optionally substituted phenyl radical, n is one and is a (C -C,)-alkoxycarbonyl, a protected 4-(C,-C,)-alkoxycarbonylpiperidine is reacted Si 25 with an optionally substituted benzyl halide in the presence of a base such as sodium hydride, potassium tert-butylate or sodium diisopropylamide, in a solvent such as tetrahydrofuran, N,N-dimethylformamide or dimethyl sulfoxide, at a temperature between -78°C and room temperature. The compound of the expected formula (XI) is obtained after a deprotection step.

To prepare a compound of formula (XI) in which R' is respectively a group -CONRoR,, or a group

-CH

2

CONR

0 xoR a compound of formula (XI) in which R', is respectively a carboxyl or a carboxymethyl is 70 reacted with a compound of the formula HNRxoR by the methods well known to those skilled in the art.

Using the methods cited above, a compound of formula (XI) in which is a group -C(=W,)NRxoR 11 or a group in which W, is a sulfur atom is prepared from a compound of the corresponding formula (XI) in which W, is an oxygen atom.

To prepare a compound of formula (XI) in which

R'

3 is a group

N

R,

3 S NR24R5

S

i 15 in which R 24 and R 25 are each independently a hydrogen or a (C 1 -C,)-alkyl, a compound of formula (XI) in which is a group

-CO-CH-R

2 3 20 Hal .:in which Hal is a halogen atom, preferably bromine, is reacted with a thiourea in which one of the amino groups is free or substituted by one or two (C 1 alkyls.

A compound of formula (XI) in which is a group

N

R

3 S NR 2 4 R-n in which R 2 s is a formyl or, respectively, a alkylcarbonyl is prepared by reacting formic acid in acetic anhydride or, respectively, an acid chloride 71 (C,-C,)-alkyl-COC1, in the presence of a base such as triethylamine, with the above compound of formula (XI) which is protected on the piperidine nitrogen and in which R 2 5 is hydrogen. The expected compound is obtained after a deprotection step.

The compound of formula (XI) in which R' 3 is a group

-CO-CH-R

2 3 10 Hal in which Hal is a bromine atom is obtained by brominating a compound of formula (XI) in which is a group -CO-CH -R 3 by the conventional methods.

15 A compound of formula (XI) in which J' is a '.group

-C

R3 in which R 4 is a group -CONR,,R,, and R' 3 is hydrogen can be prepared by reacting a protected 4-carboxypiperidine with a compound of the formula HNR 5 ,RX by the methods well known to those skilled in the art.

The compound of the expected formula (XI) is obtained after a deprotection step.

To prepare a compound of formula (XI) in which J' is a group R'3 in which R24 is a group and is a cyano, a 72 Strecker reaction is carried out by reacting a 1benzylpiperid-4-one with a compound of the formula HNRxs R in the presence of sodium cyanide. The compound of the expected formula (XI) is obtained after a deprotection step.

A compound of formula (XI) in which is a group -O-CH,-CH,-OR 2 in which RX, is hydrogen can be prepared by reacting a compound of formula (XI) in which is a benzoyloxy with ethylene glycol in the 10 presence of an acid such as sulfuric acid.

SThe compounds of formula (XI) in which is a group -O-CH,-CH,-ORx in which R 1 g is a (CL-C,)-alkyl are prepared by means of an identical reaction using a 2-(C 1 -C,)-alkoxyethanol.

15 The compounds of formula (XI) in which is a group -O-CHCH,-OR3, in which R,8 is a formyl are prepared by reacting formic acid with a compound of formula (XI) in which is a group -O-CHCH,-OH. The compounds of formula (XI) in which is a group -0-

CH

2

CH,-OR

8 in which is a (C,-C,)-alkylcarbonyl are prepared by reaction with a C,-C s acid chloride in the presence of a base such as triethylamine.

A compound of formula (XI) in which R' 3 is a group -NRCOCOR, 1 in which R 9 is a (C,-C 4 )-alkoxy is prepared by reacting a compound of the formula Cl-

COCOR,

9 with a compound of formula (XI) in which is a group -NHR,.

A compound of formula (XI) in which is a group -CO-NR 20

-NR

2

R,

2 2 is prepared by reacting a compound HNR 2

,-NR,

2 with a compound of formula (XI) in which is a chloroformyl.

A compound of formula (XI) in which is a group 73 N "NH can be prepared by reacting a protected compound of formula (XI) in which is a carbazoyl group (-CONH- NH,) with cyanogen bromide by the method described in J. Org. Chem., 1961, 26, 88-95. The compound of formula (XI) in which is a carbazoyl group is obtained by reacting hydrazine with a compound of formula (XI) in which is a chloroformyl, which is itself obtained by reacting thionyl chloride with a compound of S:formula (XI) in which is a carboxyl.

The piperidines of formula (XII) are known or 15 are prepared by known methods.

The quinuclidines of formula (XIII) are known or are prepared by known methods such as those described by T. Perrine, J. Org. Chem., 1957, 22, 1484- 1489.

The pyridines of formula (XIV) are known or are prepared by known methods.

The enantiomers of the compounds according to the invention, of the formula

/A-

Ar, in which: denotes that the carbon atom carrying this label has the determined or absolute configuration; and Am, m, Ar,, A and T are as defined for the compounds of formula and the salts thereof, where appropriate, with mineral 74 or organic acids, are novel compounds which form part of the invention.

Resolution of the racemic mixtures of the compounds of formula makes it possible to isolate the enantiomers of formula It is preferable, however, to resolve the racemic mixtures from a compound of formula (II) or an intermediate which is useful for the preparation of a compound of formula (II).

10 Thus, if it is desired to prepare the enantiomers of the compounds of formula in which -Ais the divalent radical the racemic mixture of an intermediate of the formula

CH

2

-OH

HO-(CH)m-C-CH-NH 2

(XXXIV)

Ar, in which m and Ar 1 are as defined for a compound of formula which is obtained by removal of the 0protecting group Pr from a compound of formula (XIX) by the methods described above, is resolved.

If it is desired to prepare the enantiomers of the compounds of formula in which is the divalent radical -0-CH 2

-O-CH

2

-CH

2 or -O-CH 2 the racemic mixture of an intermediate of the formula

OH

Pr,-O-(CH,)m-C-CH,-NH, (XXVII) A 30 Ar in which m and Ar. are as defined for a compound of formula and Pr 2 is as defined in SCHEME 2 above, is resolved.

If it is desired to prepare the enantiomers 75 of the compounds of formula in which is the divalent radical -O-CH -CH 2 it is also possible to resolve the racemic mixture of a compound of the formula I i

E=

H

0 CH, HO-(CfH)m-C NH

CH

2 I Lrl Ar 1 in which m and Ar- are as defined for a compound of S. formula If it is desired to prepare the enantiomers of the compounds of formula in which is 15 the divalent radical or

-N(R,)-CH

2

-CH

2 the racemic mixture of an intermediate of the formula

NH-R,

HO-(CH)m-C-CU1-NH 2

(XXXII)

Ar, in which m, Ar, and R 1 are as defined for a compound of formula is resolved.

If resolution of the racemates is effected on the intermediates of formula (XXXIV), (XXVII), (XXXII) or (II) -O-CH,-CH 2 and E this can be done by known methods involving the formation of a salt with optically active acids, for example with or tartaric acid. The diastereoisomers are then separated by conventional methods such as crystallization or chromatography, after which the optically pure enantiomers are obtained by hydrolysis.

The compounds of formula above also include those in which one or more hydrogen, carbon or iodine 76 atoms have been replaced with their radioactive isotope, for example tritium, carbon-14 or iodine-125.

Such labeled compounds are useful in research, metabolic or pharmacokinetic studies and in biochemical tests as receptor ligands.

The affinity of the compounds for the tachykinin receptors was evaluated in vitro by several biochemical tests using radioligands: 1) The binding of 2 12I]BH-SP (substance P 10 labeled with iodine-125 using Bolton-Hunter's reagent) to the NK, receptors of human lymphoblasts.

2) The binding of [125I]His-NK to the NK, receptors of the rat duodenum or bladder.

3) The binding of [125I]His[MePhe 7 ]NK to the 15 NK, receptors of the rat cerebral cortex, the guineapig cerebral cortex and the gerbil cerebral cortex, and to the human NK, cloned receptors expressed by CHO cells (Buell et al., FEBS Letters, 1992, 299, 90-95).

The tests were performed according to X.

Emonds-Alt et al. (Eur. J. Pharmacol., 1993, 250, 403- 413).

The compounds according to the invention have an affinity for the abovementioned tachykinin receptors, with an inhibition constant Ki below 10-8 M.

In particular, the compounds of the present invention are active principles of pharmaceutical compositions, the toxicity of which is compatible with their use as drugs.

The compounds of the present invention are generally administered in dosage units. Said dosage units are preferably formulated as pharmaceutical compositions in which the active principle is mixed with a pharmaceutical excipient.

Thus, according to another of its features, the present invention relates to pharmaceutical composi- 77 tions in which a compound of formula or a pharmaceutically acceptable salt thereof is present as the active principle.

The compounds of formula above and the pharmaceutically acceptable salts thereof can be used in daily doses of 0.01 to 100 mg per kilogram of body weight of the mammal to be treated, preferably in daily doses of 0.1 to 50 mg/kg. In humans, the dose can preferably vary from 0.5 to 4000 mg per day, more particularly from 2.5 to 1000 mg, depending on the age of the subject to be treated or the type of treatment: *prophylactic or curative.

In the pharmaceutical compositions of the present invention for oral, sublingual, inhalational, subcutaneous, intramuscular, intravenous, transdermal, local or rectal administration, the active principles can be administered to animals and humans in unit forms :"of administration, mixed with conventional pharmaceutical carriers. The appropriate unit forms of administration include oral forms such as tablets, gelatin :capsules, powders, granules and solutions or suspensions to be taken orally, sublingual and buccal forms of administration, aerosols, implants, subcutaneous, intramuscular, intravenous, intranasal or intraocular forms of administration and rectal forms of administration.

When a solid composition in the form of tablets is prepared, the main active principle is mixed with a pharmaceutical vehicle such as silica, gelatin, starch, lactose, magnesium stearate, talc, gum arabic or the like. The tablets can be coated with sucrose, various polymers or other appropriate substances or else they can be treated so as to have a prolonged or delayed activity and so as to release a predetermined amount of active principle continuously.

78 A preparation in the form of gelatin capsules is obtained by mixing the active principle with a diluent such as a glycol or a glycerol ester, and incorporating the mixture obtained into soft or hard gelatin capsules.

A preparation in the form of a syrup or elixir can contain the active principle together with a sweetener, which is preferably calorie-free, methylparaben and propylparaben as an antiseptic, a flavoring 10 and an appropriate color.

The water-dispersible granules or powders can Scontain the active principle mixed with dispersants or *000 wetting agents or with suspending agents such as polyvinylpyrrolidone, as well as with sweeteners or 15 taste correctors.

Rectal administration is effected using suppositories, which are prepared with binders melting at the rectal temperature, for example cocoa butter or polyethylene glycols.

Parenteral, intranasal or intraocular administration is effected using aqueous suspensions, isotonic saline solutions or sterile and injectable solutions which contain pharmacologically compatible dispersants and/or wetting agents, for example propylene glycol or butylene glycol.

Administration by inhalation is effected using an aerosol which contains for example sorbitan trioleate or oleic acid, as well as trichlorofluoromethane, dichlorofluoromethane, dichlorotetrafluoroethane or any other biologically compatible propellant gas; it is also possible to use a system containing the active principle in powder form, by itself or associated with an excipient.

The active principle can also be formulated as microcapsules, with one or more carriers or additives 79 if appropriate.

In each dosage unit, the active principle of formula is present in the amounts appropriate to the daily doses envisaged. In general, each dosage unit is suitably adjusted according to the dosage and the intended type of administration, for example tablets, gelatin capsules and the like, sachets, ampoules, syrups and the like, and drops, so that such a dosage unit contains from 0.5 to 1000 mg of active 10 principle, preferably from 2.5 to 250 mg, to be administered one to four times a day.

The abovementioned compositions can also contain other active products such as, for example, bronchodilators, antitussives, antihistamines, anti- 15 inflammatories, antiemetics and chemotherapeutic agents.

According to another of its features, the present invention relates to the use of the products of formula for the preparation of drugs intended for the treatment of physiological disorders associated with an excess of tachykinins, and all neurokinindependent pathological conditions of the respiratory, gastrointestinal, urinary, immune, cardiovascular and central nervous systems, as well as pain and migraine.

Non-limiting examples are: acute and chronic pain associated for example with migraine, with pains experienced by cancer and angina patients, and with chronic inflammatory processes such as osteoarthritis and rheumatoid arthritis, inflammations such as neurogenic inflammations, chronic inflammatory diseases, for example obstructive chronic respiratory diseases, asthma, allergies, rhinitis, coughs, bronchitis, hypersensitivity, for example to pollen and mites, rheumatoid arthritis, fibrositis, osteoarthritis, psoriasis, ulcerative 80 colitis, Crohn's disease, inflammation of the intestines (irritable colon), prostatitis, nervous bladder, incontinence, cystitis, urethritis and nephritis, ophthalmic diseases such as conjunctivitis and vitreoretinopathy, and skin diseases such as contact dermatitis, atopical dermatitis, urticaria, eczema, pruritus and burns, especially sunburn, diseases of the immune system associated with suppression or stimulation of the functions of the immune cells, for example rheumatoid arthritis, psoriasis, 'Crohn's disease, diabetes, lupus and rejection reactions following transplantation, small-cell lung cancers and demyelination diseases such as multiple sclerosis or amyotrophic lateral sclerosis, diseases of the central nervous system of the neuropsychiatric or neurological type, such as anxiety, vigilance disorders, mood disorders, depression, psychosis, schizophrenia, mania, dementia, epilepsy, Parkinson's disease, Alzheimer's disease, drug dependence, alcoholism, Down's syndrome and Huntington's chorea, as well as neurodegenerative diseases and stress-related somatic disorders, diseases of the gastrointestinal system, such as nausea, vomiting of any origin, irritable colon, gastric and duodenal ulcers, esophageal ulcer, diarrhea and hypersecretions, diseases of the cardiovascular system, such as hypertension, the vascular aspects of migraine, edema, thrombosis, angina pectoris, vascular spasms, circulatory diseases due to vasodilation, Reynauld's diseases, fibrosis and collagen diseases, and heart rate and rhythm disorders, in particular those caused by pain or stress.

The present invention also includes a method of 81 treating said complaints at.the doses indicated above.

The following abbreviations are used in the Preparations and in the Examples: Me, OMe: methyl, methoxy Et, OEt: ethyl, ethoxy EtOH: ethanol MeOH: methanol Ether: diethyl ether Iso ether: diisopropyl ether DMF: dimethylformamide DMSO: dimethyl sulfoxide DCM: dichloromethane THF: tetrahydrofuran AcOEt: ethyl acetate NaCO 3 sodium carbonate NaHCO 3 sodium hydrogencarbonate NaCl: sodium chloride NaSO,: sodium sulfate MgSO4: magnesium sulfate 20 NaOH: sodium hydroxide HC1: hydrochloric acid TFA: trifluoroacetic acid KCN: potassium cyanide Na 2 ,SO: sodium metabisulfite DBU: 1,8-diazabicyclo[5.4.0]undec-7-ene

NH

4 Cl: ammonium chloride melting point RT: room temperature Silica H: silica gel 60H, marketed by Merck (DARMSTADT) NMR: nuclear magnetic resonance 6: chemical shift s: singlet bs: broad singlet d: doublet t: triplet 82 q: quadruplet mt: multiplet u: unresolved signals 83

PREPARATIONS

Preparation 1.1 5-(3, 4 -Dichlorophenyl)-5-[2-(tetrahydropyran-2yloxy)ethyl]tetrahydro-2H-l,3-oxazin-2-one A) 2-(3,4-Dichlorophenyl)-4-(tetrahydropyran-2-yloxy)butanenitrile A suspension of 17.75 g of sodium hydride dispersion in oil) in 750 ml of THF is cooled in an ice bath, a solution of 100 g of 3,4-dichlorophenylacetonitrile in 250 ml of THF is added dropwise and the reaction mixture is stirred for two hours at RT. It is cooled to -20°C, a solution of 112.36 g of l-bromo-2- (tetrahydropyran-2-yloxy)ethane in 120 ml of THF is added dropwise and the reaction mixture is stirred for 2 hours at RT. It is concentrated under vacuum, the residue is taken up with water and extracted with ether, the organic phase is washed twice with a buffer solution of pH 4, with a buffer solution of pH 7 and twice with saturated NaCl solution and dried over 20 Na2SO, and the solvent is evaporated off under vacuum.

The residue is chromatographed on silica using toluene and then a toluene/AcOEt mixture (100/3; v/v) as the eluent to give 113.5 g of the expected product, which is used as such.

B) 2-(3, 4 -Dichlorophenyl)-2-(hydroxymethyl)-4-(tetrahydropyran-2-yloxy)butanenitrile A mixture of 12.56 g of the compound obtained in the previous step, 9.6 g of 37% aqueous formaldehyde Ssolution and 0.3 g of DBU in 25 ml of 1,2-dimethoxy- 30 ethane is refluxed for 1 hour. The reaction mixture is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed twice with water, twice with a buffer solution of pH 4, twice with water and twice with saturated NaC1 solution and dried over NaSO 4 and the solvent is evaporated off under 84 vacuum to give 17 g of the expected product, which is used as such.

C) 2-(3, 4 -Dichlorophenyl)-2-(hydroxymethyl)-4-(tetrahydropyran-2-yloxy)butylamine A mixture of 17 g of the compound obtained in the previous step and 6 g of Raney® nickel in 300 ml of EtOH and 40 ml of 20% aqueous ammonia solution is hydrogenated for 5 hours at 40°C and at atmospheric pressure. The catalyst is filtered off and the filtrate is concentrated under vacuum. The residue is taken up with DCM, the organic phase is washed with water and with saturated NaCl solution and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 16.5 g of the expected product in the form of an oil, which is used as such.

D) 5-(3, 4 -Dichlorophenyl)-5-[2-(tetrahydropyran-2-yl- :oxy)ethyl]tetrahydro-2H-l,3-oxazin-2-one 24.6 g of a 20% solution of phosgene in toluene, diluted in 150 ml of DCM, are cooled to -70°C, a solution of 16.5 g of the compound obtained in the previous step and 5.7 g of triethylamine in 100 ml of DCM is added dropwise and the reaction mixture is stirred while the temperature is allowed to rise to RT.

It is concentrated under vacuum, the residue is taken up with a water/AcOEt mixture and the product which S.crystallizes at the interphase is wrung to give a first crop of the expected product. After decantation of the filtrate, the organic phase is washed with water, with a buffer solution of pH 4 and with satura- 30 ted NaCl solution and dried over MgSO 4 and the solvent is evaporated off under vacuum. The residue is taken up with AcOEt and the crystalline product formed is wrung to give the second crop of the product.

A

total of 4.5 g of the expected product is obtained.

85 Preparation 1.2 5-(3,4-Dichlorophenyl)-5-[3-(tetrahydropyran- 2 yloxy)propyl]tetrahydro-2H-l,3-oxazin-2-one A) 2-(3,4-Dichlorophenyl)-5-(tetrahydropyran-2-yloxy)pentanenitrile A solution of 50.8 g of 3,4-dichlorophenylacetonitrile in 250 ml of THF is added dropwise at a temperature below 20"C to a suspension of 12 g of sodium hydride (55% dispersion in oil) in 175 ml of THF and the reaction mixture is stirred for 2 hours at RT.

It is cooled to -20°C, a solution of 62.5 g of 1-bromo- 3-(tetrahydropyran-2-yloxy)propane in 60 ml of THF is added dropwise and the reaction mixture is stirred while the temperature is allowed to rise to RT. It is poured into a solution of 31 g of ammonium chloride in 1.4 liters of water and extracted with ether, the combined organic phases are washed with saturated NaCl solution and dried over MgSO, and the solvents are .9 evaporated off under vacuum. The residue is chromato- 20 graphed on silica using toluene and then a toluene/ AcOEt mixture (95/5; v/v) as the eluent to give 64 g of the expected product, which is used as such.

B) 2-(3,4-Dichlorophenyl)-2-(hydroxymethyl)-5-(tetrahydropyran-2-yloxy)pentanenitrile 25 A mixture of 15 g of the compound obtained in the previous step, 11.2 g of 37% aqueous formaldehyde solution and 0.35 g of DBU in 30 ml of 1,2-dimethoxyethane is refluxed for 1 hour. The reaction mixture is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water, twice with a buffer solution of pH 4, twice with water and twice with saturated NaCl solution and dried over Na 2

SO

4 and the solvent is evaporated off under vacuum.

The residue is chromatographed on silica using toluene and then a toluene/AcOEt mixture (80/20; v/v) as the 86 eluent to give 15.5 g of the expected product, which is used as such.

C) 2 3 ,4-Dichlorophenyl)-2-(hydroxymethyl)-5-(tetrahydropyran-2-yloxy)pentylamine A mixture of 15.5 g of the compound obtained in the previous step and 5 g of Raney® nickel in 200 ml of EtOH and 40 ml of 20% aqueous ammonia solution is hydrogenated for 5 hours at 30°C and at atmospheric pressure. The catalyst is filtered off and the filtrate is concentrated under vacuum. The residue is taken up with DCM, the organic phase is washed with water and with saturated NaC1 solution and dried over MgSO, and the solvent is evaporated off under vacuum to give 14.9 g of the expected product in the form of an oil, which is used as such.

D) 5-(3,4-Dichlorophenyl)-5-[3-(tetrahydropyran-2-yloxy)propyl]tetrahydro-2H-l,3-oxazin-2-one 21.4 g of a 20% solution of phosgene in toluene, diluted in 120 ml of DCM, are cooled to -70°C, a 20 solution of 14.9 g of the compound obtained in the previous step and 4.98 g of triethylamine in 80 ml of DCM is added dropwise and the reaction mixture is stirred while the temperature is allowed to rise to RT.

It is concentrated under vacuum, the residue is taken up with water and extracted with ether, the organic phase is washed with water and with saturated NaCl solution and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 12.5 g of the expected product, which is used as such.

Preparation 1.3 6-(3,4-Dichlorophenyl)-6-[2-(tetrahydropyran- 2-yloxy)ethyl]morpholin-3-one A) 2-(3,4-Dichlorophenyl)-2-hydroxyacetonitrile A mixture of 70 g of 3,4-dichlorobenzaldehyde and 90 g of NaS,20 in 300 ml of water is stirred

I

87 overnight at RT. The reaction mixture is cooled to 0°C, a solution of 52 g of KCN in 100 ml of water is added dropwise and the reaction mixture is stirred while the temperature is allowed to rise to RT. It is extracted with ether, the organic phase is washed with water and dried over NaSO 4 and the solvent is evaporated off under vacuum to give 76 g of the expected product, which is used as such.

B) 2-(3,4-Dichlorophenyl)-2-(tetrahydropyran-2-yloxy)acetonitrile A solution of 76 g of the compound obtained in the previous step and 0.25 g of p-toluenesulfonic acid monohydrate in 300 ml of DCM is cooled to '0C, a solution of 39 g of 3,4-dihydro-2H-pyran in 50 ml of DCM is added dropwise and the reaction mixture is stirred while the temperature is allowed to rise to RT. It is washed with saturated NaHCO, solution and with water, the organic phase is dried over NaSO, and the solvent is evaporated off under vacuum to give 33 g of the 20 expected product after crystallization at 0'C from pentane. M.p. 61°C.

C) 4-(Benzoyloxy)-2-( 3 ,4-dichlorophenyl)-2-(tetrahydropyran-2-yloxy)butanenitrile 56 ml of a 2 M solution of lithium diisopropylamide in THF are cooled to -60°C, a solution of 32 g of the compound obtained in the previous step in 50 ml of THF is added dropwise and the mixture is stirred for 1 hour at -60°C. A solution of 25.4 g of 2-bromoethyl benzoate in 50 ml of THF is then added dropwise at -60°C and the reaction mixture is stirred while the temperature is allowed to rise to RT. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and with a buffer solution of pH 4 and dried over NaSO 4 and the solvent is evaporated off under vacuum. The residue is 88 chromatographed on silica using a toluene/AcOEt mixture (100/5; v/v) as the eluent to give 34 g of the expected product, which is used as such.

D) 4-(Benzoyloxy)-2-(3,4-dichlorophenyl)-2-(tetrahydro- Pyran-2-yloxy)butylamine A mixture of 34 g of the compound obtained in the previous step and 10 g of Raney® nickel in 400 ml of EtOH and 40 ml of concentrated ammonia solution is hydrogenated at RT and at atmospheric pressure. The catalyst is filtered off and the filtrate is concentrated under vacuum. The residue is taken up with water and extracted with ether, the organic phase is washed with saturated NaCI solution and dried over Na2SO4 and the solvent is evaporated off under vacuum.

The residue is chromhtographed on silica H using a gradient of a DCM/MeOH mixture (from 100/1; v/v to 100/3; v/v) as the eluent to give 16 g of the expected product, which is used as such.

S E) N-( 2 -Bromoacetyl)-4-(benzoyloxy)-2-(3,4-dichloro- 20 phenyl)- 2 -hydroxybutylamine A solution of 16 g of the compound obtained in the previous step and 4.8 g of triethylamine in 100 ml of DCM is cooled to -60°C, a solution of 5.68 g of bromoacetyl chloride in 20 ml of DCM is added dropwise 25 and the reaction mixture is stirred for 30 minutes. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and with a buffer solution of pH 4 and dried over Na SO, and the solvent is evaporated off under vacuum. The product obtained is dissolved in the minimum amount of MeOH and acidified to pH 1 by the addition of a saturated solution of gaseous HC1 in ether, and the solvents are evaporated off under vacuum. The residue is taken up with water and extracted with AcOEt, the organic phase is washed with saturated NaHCO, solution and with 89 water and dried over NaSO, and the solvent is evaporated off under vacuum to give 16 g of the expected product, which is used as such.

F) 6-(3, 4 -Dichlorophenyl)-6-(2-hydroxyethyl)morpholin- 3-one A mixture of 16 g of the compound obtained in the previous step, 50 ml of propan-2-ol, 15 ml of 10 N NaOH solution and 10 ml of DMF is stirred for 4 hours.

The reaction mixture is concentrated under vacuum, the residue is extracted with AcOEt, the organic phase is washed with water and dried over Na 2

SO

4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a gradient of a DCM/MeOH mixture (from 100/3; v/v to 100/5; v/v) as the eluent to give 6.1 g of the expected product.

Proton NMR spectrum at 200 MHz in DMSO-d 6 S" 6: 2.05 ppm mt 2H 3.0 to 4.4 ppm u 6H 4.5 ppm t 1H 7.3 to 8.3 ppm u 4H G) 6 3 4 -Dichlorophenyl)-6-[2-(tetrahydropyran-2-yloxy)ethyl]morpholin-3-one A solution of 1.7 g of the compound obtained in the previous step and 0.003 g of p-toluenesulfonic acid 25 monohydrate in 50 ml of DCM is cooled to 0°C, 0.588 g of 3,4-dihydro-2H-pyran in 10 ml of DCM is added dropwise and the reaction mixture is stirred for 1 hour at RT. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with saturated NaHCO, solution and with water and dried over Na 2

SO

4 and the solvent is evaporated off under vacuum.

The residue is chromatographed on silica H using a DCM/ MeOH mixture (100/2; v/v) as the eluent to give 1.8 g of the expected product, which is used as such.

90 Preparation 1.4 6-[2-(Benzoyloxy)ethyl]-6-(3,4-dichlorophenyl)morpholin-3-one A mixture of 4.8 g of the compound obtained in step E of Preparation 1.3 and 1.4 g of KCO, in 100 ml of xylene is heated at 130°C overnight. After cooling to RT, the reaction mixture is filtered and the filtrate is concentrated under vacuum. The residue is extracted with ether, the organic phase is washed with a buffer solution of pH 2 and with water and dried over MgSO 4 and the solvent is evaporated off under vacuum.

The residue is chromatographed on silica H using a DCM/ MeOH mixture (100/1; v/v) as the eluent to give 1.4 g of the expected product.

Proton NMR spectrum at 200 MHz in DMSO-d 6 6: 2.45 ppm mt 2H S3.75 ppm AB system 2H S3.9 to 4.5 ppm u 4H 7.4 to 7.9 ppm u 8H 8.25 ppm bs 1H This compound can also be obtained by following the three steps of the method described below.

4-(Benzoyloxy)-2-(3,4-dichlorophenyl)-2-hydroxybutylamine hydrochloride This compound is described in step A of Preparation 1.7.

N-(2-Chloroacetyl)-4-(benzoyloxy)-2-(3,4-dichlorophenyl)-2-hydroxybutylamine A solution of 20 g of the compound obtained in the previous step and 10.3 g of triethylamine in 100 ml of DCM is cooled to 0°C, 5.8 g of chloroacetyl chloride are added dropwise and the reaction mixture is stirred for 30 minutes. It is concentrated under vacuum, the residue is extracted with AcOEt, the organic phase is washed with water, with a buffer solution of pH 2 and 91 with water and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 22 g of the expected product, which is used as such.

6-[2-(Benzoyloxy)ethyl]-6-(3,4-dichlorophenyl)morpholin-3-one A solution of 22 g of the compound obtained in the previous step in 600 ml of THF is cooled to 11.42 g of potassium tert-butylate are added and the reaction mixture is stirred until dissolution is complete. It is concentrated under vacuum, the residue is extracted with AcOEt, the organic phase is washed with a buffer solution of pH 2 and with water and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 12.8 g of the expected product after crystallization from ether.

Preparation 2-(3,4-Dichlorophenyl)-2-(2-hydroxyethyl)morpholine A suspension of 1.6 g of lithium aluminum 20 hydride in 25 ml of THF is heated to 60°C, a solution of 4 g of the compound obtained in step F of Preparation 1.3 in 20 ml of THF is added dropwise and the mixture is stirred for 30 minutes under reflux. After cooling, 1.5 ml of water, 1.5 ml of 4 N NaOH and then 25 4.5 ml of water are added. The mineral salts are filtered off on Celite®, the filtrate is decanted and the organic phase is evaporated under vacuum. The residue is taken up with ether and dried over NaSO, and the solvent is evaporated off under vacuum to give 3.6 g of the expected product.

92 Preparation 1.6 2-(3,4-Dichlorophenyl)-2-(3-hydroxypropyl)morpholine A) 5-(Benzoyloxy)-2-(3,4-dichlorophenyl)-2-(tetrahydropyran-2-yloxy)pentanenitrile 47 ml of a 1.5 M solution of lithium diisopropylamide in THF are cooled to -60'C, a solution of 19.3 g of the compound obtained in step B of Preparation 1.3 in 100 ml of THF is added dropwise and the mixture is stirred for 30 minutes at -60°C. 17 g of 3bromopropyl benzoate are then added dropwise at and the reaction mixture is stirred while the temperature is allowed to rise to RT. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and with saturated NaCl solution and dried over NaSO, and the solvent is evaporated off under vacuum to give 21 g of the expec- S: ted product after crystallization from hexane.

B) 5-(Benzoyloxy)-2-(3,4-dichlorophenyl)-2-(tetrahydro- 20 pyran-2-yloxy)pentylamine SA mixture of 20 g of the compound obtained in the previous step and 7 g of Raney® nickel in 300 ml of MeOH is hydrogenated at RT and at atmospheric pressure.

The catalyst is filtered off and the filtrate is concentrated under vacuum. The residue is taken up with water and extracted with ether, the organic phase is washed with water and dried over Na 2

SO

4 and the solvent is evaporated off under vacuum to give 20 g of the expected product, which is used as such.

C) N-(2-Chloroacetyl)-5-(benzoyloxy)-2-(3,4-dichlorophenyl)-2-(tetrahydropyran-2-yloxy)pentylamine A solution of 9 g of the compound obtained in the previous step and 2.4 g of triethylamine in 100 ml of DCM is cooled to 0°C, a solution of 2.23 g of chloroacetyl chloride in 20 ml of DCM is added dropwise 93 and the reaction mixture is stirred for 30 minutes. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and dried over Na 2

SO

4 and the solvent is evaporated off under vacuum to give 9.5 g of the expected product, which is used as such.

D) N-(2-Chloroacetyl)-5-(benzoyloxy)-2-(3,4-dichlorophenyl)-2-hydroxypentylamine A saturated solution of gaseous HC1 in ether is added to a solution of 9 g of the compound obtained in the previous step in 50 ml of DCM and 50 ml of MeOH until the pH is 1, and the mixture is stirred for minutes at RT. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and with saturated NaHCO, solution and dried over Na 2

SO

4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (100/3; v/v) as the eluent to give 4.7 g of the expected product, which is used as 20 such.

E) 6-(3,4-Dichlorophenyl)-6-(3-hydroxypropyl)morpholin- 3-one A mixture of 2.95 g of the compound obtained in the previous step, 40 ml of propan-2-ol and 3 ml of N NaOH solution is stirred for 2 hours at RT. The reaction mixture is concentrated under vacuum, the residue is extracted with DCM, the organic phase is washed with water and dried over NaSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a gradient of a DCM/MeOH mixture (100/2; v/v to 100/5; v/v) as the eluent to give 0.5 g of the expected product. M.p. 130-132'C.

F) 2-(3,4-Dichlorophenyl)-2-(3-hydroxypropyl)morpholine A suspension of 0.82 g of lithium aluminum hydride in 10 ml of THF is heated to 60°C, a solution 94 of 2 g of the compound obtained in the previous step in ml of THF is added dropwise and the mixture is stirred for 30 minutes under reflux. After cooling, 1 ml of water, 1 ml of 4 N NaOH and then 3 ml of water are added. The mineral salts are filtered off on C4lite®, the filtrate is decanted and the organic phase is evaporated under vacuum. The residue is taken up with ether and dried over NaSO4 and the solvent is evaporated off under vacuum to give 2 g of the expected 10 product.

.Proton NMR spectrum at 200 MHz in DMSO-d 6 0.8 to 2.2 ppm u 4H ~2.5 to 3.7 ppm u 8H S4.3 ppm t 1H 7.2 to 7.7 ppm u 3H Preparation 1.7 5-[2-(Benzoyloxy)ethyl]-5-(3,4-dichlorophenyl)oxazolidin-2-one A) 4 -(Benzoyloxy)-2-(3,4-dichlorophenyl)-2-hydroxybutylamine hydrochloride A saturated solution of gaseous HC1 in ether is added at RT to a solution of 12 g of the compound obtained in step D of Preparation 1.3 in 50 ml of MeOH until the pH is 1, and the reaction mixture is stirred for 1 hour at RT. It is concentrated under vacuum, the residue is taken up with DCM and the precipitate formed is wrung and washed with ether to give 3.4 g of the expected product after recrystallization from propan-2-ol. M.p. 200-204'C.

B) 5-[2-(Benzoyloxy)ethyl]-5-(3,4-dichlorophenyl)oxazolidin-2-one 1.4 g of 1,1'-carbonyldiimidazole are added at RT to a solution of 3 g of the compound obtained in the previous step and 0.85 g of triethylamine in 30 ml of 1,2-dichloroethane and the reaction mixture is stirred 95 for 30 minutes at RT and then heated at 50'C for 2 hours. It is concentrated under vacuum, the residue is taken up with water and extracted with DCM, the organic phase is washed with a buffer solution of pH 2 and with water and dried over Na SO, and the solvent is evaporated off under vacuum to give 3 g of the expected product.

Proton NMR spectrum at 200 MHz in DMSO-d 6 6: 2.6 ppm mt 2H 10 3.75 ppm AB system 2H 4.35 ppm mt 2H 7.4 to 7.8 ppm u 8H 7.9 ppm s 1H Preparation 1.8 6-(3,4-Dichlorophenyl)-l-methyl-6-[2-(tetrahydropyran-2-yloxy)ethyl]piperazine-2,3-dione 2-(3, 4 -Dichlorophenyl)-2-(methylamino)acetonitrile hydrochloride A mixture of 10 g of 3,4-dichlorobenzaldehyde and 9.5 ml of cyanotrimethylsilane is cooled in an ice bath, 10 mg of zinc iodide are added and the mixture is stirred for 30 minutes at RT. 20 ml of a 33% solution of methylamine in EtOH are then added and the mixture is heated at 40°C for 2 hours. The solvent is concentrated under vacuum, the residue is extracted with ether and the organic phase is dried over MgSO 4 and filtered. A saturated solution of gaseous HC1 in ether is added to the filtrate until the pH is 1, and acetone is then added until the product precipitates. The precipitate formed is wrung, washed with ether and dried to give 12.8 g of the expected product. M.p. 1720C.

B) 2-(tert-Butoxycarbonyl-N-methylamino)-2-(3,4-dichlorophenyl)acetonitrile Concentrated NaOH solution is added to an 96 aqueous suspension of 12.8 g of the compound obtained in the previous step until the pH is 13, the mixture is extracted with ether, the organic phase is dried over MgSO 4 and the solvent is evaporated off under vacuum.

The residue is taken up with 20 ml of 1,4-dioxane, 12.5 g of di-tert-butyl dicarbonate are added and the reaction mixture is heated at 60°C for 2 hours. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with a buffer 10 solution of pH 2, with saturated NaCl solution and with 10% Na 2

CO

3 solution and dried over MgSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica using heptane and then a heptane/AcOEt mixture (96/4; v/v) as the eluent to give 12.7 g of the expected product, which is used as such.

C) 2 -(tert-Butoxycarbonyl-N-methylamino)-2-(3,4-dichlorophenyl)-4-(tetrahydropyran-2-yloxy)butanenitrile A solution of 11.1 g of the compound obtained in the previous step in 60 ml of DMF is added dropwise to a suspension of 1.5 g of sodium hydride (60% dis- S* persion in oil) in 50 ml of DMF, the temperature being S* maintained at 25°C, and the mixture is stirred for 1 hour at RT. A solution of 8.1 g of l-bromo-2-(tetrahydropyran-2-yloxy)ethane in 20 ml of DMF is then added and the reaction mixture is heated at 60°C for 4 hours.

After cooling to RT, it is poured into a mixture of ice and a buffer of pH 2 and extracted with ether, the organic phase is washed twice with water and dried over MgSO, and the solvent is evaporated off under vacuum.

The residue is chromatographed on silica using heptane and then a heptane/AcOEt mixture (75/25; v/v) as the eluent to give 13.2 g of the expected product, which is used as such.

97 D) 2 -(tert-Butoxycarbonyl-N-methylamino)-2-(3,4-dichlorophenyl)-4-(tetrahydropyran-2-yloxy)butylamine A mixture of 13.2 g of the compound obtained in the previous step and 4 g of Raney® nickel in 150 ml of EtOH and 50 ml of 20% aqueous ammonia solution is hydrogenated at 30°C and at atmospheric pressure.

After 5 hours, the catalyst is filtered off and the filtrate is concentrated under vacuum. The residue is extracted with ether, the organic phase is washed twice 10 with water and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 12.6 g of the expected product, which is used as such.

8*8 E) 2-(3, 4 -Dichlorophenyl)-4-hydroxy-2-(methylamino)butylamine hydrochloride 15 A mixture of 4.6 g of the compound obtained in the previous step and 10 ml of concentrated HC1 solution in 40 ml of MeOH is heated at 70"C for 1 hour.

The solvent is then concentrated under vacuum, the residue is taken up with acetone and the precipitate formed is wrung, washed with ether and dried to give 2.79 g of the expected product. M.p. 240°C (dec.).

F) 6-(3,4-Dichlorophenyl)-6-(2-hydroxyethyl)-l-methylpiperazine-2,3-dione Concentrated NaOH solution is added to an aqueous suspension of 5.3 g of the compound obtained in the previous step until the pH is 13, the mixture is extracted with ether, the organic phase is dried over MgSO 4 and the solvent is evaporated off under vacuum.

The product obtained (4 g) is taken up with 50 ml of EtOH, 2.57 g of diethyl oxalate are added and the reaction mixture is stirred for 1 hour at RT. It is concentrated under vacuum and the residue is taken up with 60 ml of toluene and refluxed for 70 hours. It is concentrated under vacuum to give 2.8 g of the expected 98 product after crystallization from DCM. M.p. 260°C.

G) 6-(3,4-Dichlorophenyl)-l-methyl-6-[2-(tetrahydropyran-2-yloxy)ethyl]piperazine-2,3-dione 0.1 g of p-toluenesulfonic acid monohydrate and then 1.26 ml of 3 4 -dihydro-2H-pyran are added to a suspension of 2.8 g of the compound obtained in the previous step in 50 ml of DCM and the reaction mixture is stirred overnight at RT. It is washed with NaCO 3 solution and with water, the organic phase is dried over MgSO, and the solvent is evaporated off under vacuum. The residue is chromatographed on silica using AcOEt and then an AcOEt/MeOH mixture (93/7; v/v) as the eluent to give 3.1 g of the expected product, which is used as such.

15 Preparation 1.9 2-(3,4-Dichlorophenyl)-l-methyl-2-[2-(tetrahydropyran-2-yloxy)ethyl]piperazine A solution of 2 g of the compound obtained in Preparation 1.8 in 20 ml of TUF is added dropwise to a suspension of 1.2 g of lithium aluminum hydride in ml of THF and the mixture is refluxed for 1 hour.

After cooling, 5 ml of water are added, the mineral salts are filtered off, the filtrate is concentrated under vacuum, the residue is taken up with ether, the organic phase is dried over MgSO 4 and the solvent is evaporated off under vacuum to give 1.9 g of the expected product in the form of an oil.

i Preparation 1.10 6-[2-(Benzoyloxy)ethyl]-6-(3,4-difluorophenyl)morpholin-3-one A) 2-(3,4-Difluorophenyl)-2-hydroxyacetonitrile A solution of 80.2 g of Na 2

S

2 0, in 250 ml of water is heated to 50C, 50 g of 3,4-difluorobenzaldehyde are added and the reaction mixture is stirred for 1 hour at 50 C and left to stand overnight at RT.

99 It is cooled to 0°C, a solution of 77.7 g of KCN in 100 ml of water is added dropwise, the mixture is stirred while the temperature is allowed to rise to RT, and stirring is then continued for 1 hour at RT. The reaction mixture is extracted with ether, the organic phase is washed with water and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 48 g of the expected product, which is used as such.

B) 2-(3,4-Difluorophenyl)-2-(tetrahydropyran-2-yloxy)acetonitrile A solution of 48 g of the compound obtained in the previous step and 0.2 g of p-toluenesulfonic acid monohydrate in 500 ml of DCM is cooled to 0°C, a solution of 28.6 g of 3,4-dihydro-2H-pyran in 50 ml of DCM 15 is added dropwise, the mixture is stirred while the temperature is allowed to rise to RT, and stirring is then continued overnight at RT. The reaction mixture is concentrated under vacuum, the residue is extracted with DCM, the organic phase is washed with 10% NaCO, solution and with water and dried over NaSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica using a toluene/AcOEt mixture (100/15; v/v) as the eluent to give 43 g of the expected product, which is used as such.

C) 4-(Benzoyloxy)-2-(3,4-difluorophenyl)-2-(tetrahydropyran-2-yloxy)butanenitrile 133 ml of a 1.5 M solution of lithium diisopropylamide in THF are cooled to -60"C, a solution of 43 g of the compound obtained in the previous step in 250 ml of THF is added dropwise and the mixture is stirred for 30 minutes at -60C. A solution of 45.8 g of 2-bromoethyl benzoate in 100 ml of THF is then added dropwise at -60°C and the reaction mixture is stirred while the temperature is allowed to rise to RT. It is concentrated under vacuum, the residue is extracted 100 with ether, the organic phase is washed with water and with a buffer solution of pH 4 and dried over Na SO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica using a toluene/ AcOEt mixture (100/5; v/v) as the eluent to give 47 g of the expected product, which is used as such.

D) 4 -(Benzoyloxy)-2-(3,4-difluorophenyl)-2-(tetrahydropyran-2-yloxy)butylamine A mixture of 47 g of the compound obtained in the previous step and 10 g of Raney® nickel in 400 ml of EtOH is hydrogenated at RT and at atmospheric pressure. The catalyst is filtered off and the filtrate is concentrated under vacuum. The residue is taken up with water and extracted with ether, the organic phase 15 is washed with water and dried over NaSO, and the solvent is evaporated off under vacuum to give 45 g of the expected product, which is used as such.

E) 4 -(Benzoyloxy)-2-(3,4-difluorophenyl)-2-hydroxybutylamine hydrochloride A saturated solution of gaseous HC1 in ether is S'added at RT to a solution of 45 g of the compound obtained in the previous step in 250 ml of MeOH until the pH is 1, and the reaction mixture is stirred for minutes at RT. It is concentrated under vacuum, the residue is taken up with ether and the precipitate formed is wrung and washed with ether to give 15 g of the expected product after recrystallization from propan-2-ol. M.p. 202-204°C.

F) N-(2-Chloroacetyl)-4-(benzoyloxy)-2-(3,4-difluorophenyl)- 2 -hydroxybutylamine A solution of 12.2 g of the compound obtained in the previous step and 7.88 g of triethylamine in 100 ml of DCM is cooled to 0°C, a solution of 3.85 g of chloroacetyl chloride in 100 ml of DCM is added dropwise and the reaction mixture is stirred for 30 min- 101 utes. It is concentrated under vacuum, the residue is extracted with an ether/AcOEt mixture (50/50; the organic phase is washed with water, with a buffer solution of pH 4 and with water and dried over Na 2

SO

4 and the solvent is evaporated off under vacuum to give 13.5 g of the expected product, which is used as such.

G) 6 -[2-(Benzoyloxy)ethyl]-6-(3,4-difluorophenyl)morpholin-3-one A mixture of 13.5 g of the compound obtained in the previous step and 20.7 g of KCO 3 in 100 ml of toluene is refluxed overnight. The reaction mixture is concentrated under vacuum, the residue is taken up with ether and the mixture is filtered. The filtrate is washed with water, with a buffer solution of pH 2 and with water and dried over MgSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (100/1; v/v) as the eluent to give 4.9 g of the expected product.

Proton NMR spectrum at 200 MHz in DMSO-d, 6: 2.35 ppm mt 2H 3.65 ppm AB system 2H 3.8 to 4.35 ppm u 4H S7.1 to 7.8 ppm u 8H 8.2 ppm bs 1H Preparation 1.11 2-(3,4-Difluorophenyl)-2-(2-hydroxyethyl)morpholine A suspension of 1.8 g of lithium aluminum hydride in 20 ml of THF is added dropwise at RT to a solution of 2.8 g of the compound obtained in Preparation 1.10 in 20 ml of THF and the mixture is then refluxed for 5 hours. After cooling, 2 ml of water, 2 ml of 4 N NaOH and then 6 ml of water are added. The mineral salts are filtered off and the filtrate is 102 concentrated under vacuum. The residue is dissolved in DCM, acidified to pH 1 by the addition of a saturated solution of gaseous HC1 in ether, and extracted with water, the aqueous phase is washed with ether, rendered alkaline to pH 8 by the addition of concentrated NaOH solution, and extracted with DCM, the organic phase is washed with water and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 0.77 g of the expected product, which is used as such in EXAMPLE 27, step A.

Preparation 1.12 5-[2-(Benzoyloxy)ethyl]-5-(3,4-difluorophenyl)oxazolidin-2-one 1 g of l,l'-carbonyldiimidazole is added at RT 15 to a solution of 2.1 g of the compound obtained in step E of Preparation 1.10 and 0.63 g of triethylamine in ml of 1,2-dichloroethane and the reaction mixture is then stirred for 1 hour at RT and heated for 2 hours at :50 C. It is concentrated under vacuum, the residue is extracted with DCM, the organic phase is washed with water, with a buffer solution of pH 2 and with water and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 1.5 g of the expected product.

Preparation 1.13 5-(3,4-Dichlorophenyl)-l-methyl-5-[2-(tetrahydropyran-2-yloxy)ethyl]imidazolidin-2-one A) 2-(3,4-Dichlorophenyl)-2-(methylamino)-4-(tetrahydropyran-2-yloxy)butylamine A mixture of 3.4 g of the compound obtained in step E of Preparation 1.8, 0.05 g of p-toluenesulfonic acid monohydrate and 2.1 ml of 3,4-dihydro-2H-pyran in ml of DMF is heated at 60°C for 45 minutes. The reaction mixture is poured onto ice, rendered alkaline by the addition of concentrated NaOH and extracted with ether, the organic phase is washed with water and dried 103 over MgSO 4 and the solvent is evaporated off under vacuum to give 4.3 g of the expected product, which is used as such.

B) 5-(3,4-Dichlorophenyl)-l-methyl-5-[2-(tetrahydropyran-2-yloxy)ethyl]imidazolidin-2-one 1.6 g of l,l'-carbonyldiimidazole are added to a solution of 3.2 g of the compound obtained in the previous step in 100 ml of 1,2-dichloroethane and the reaction mixture is stirred for 30 minutes at RT. It is then heated at 60 C for 2 hours and concentrated under vacuum. The residue is extracted with AcOEt, the organic phase is washed with a buffer solution of pH 2, with saturated NaCl solution and with 10% Na 2 CO, solution and dried over MgSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using DCM and then a DCM/MeOH mixture (98/2; v/v) as the eluent to give 2.4 g of the expected product in the form of an oil.

Preparation 1.14 6-[3-(Benzoyloxy)propyl]-6-(3,4-dichlorophenyl)morpholin-3-one A mixture of 7.5 g of the compound obtained in step D of Preparation 1.6, 9.3 g of KCO3 and 3.75 g of sodium iodide in 100 ml of methyl ethyl ketone is refluxed overnight. After cooling, the reaction mixture is concentrated under vacuum, the residue is taken up with ether, the mineral salts are filtered off, the filtrate is washed with a buffer solution of pH 2 and with water, the organic phase is dried over MgSO, and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using DCM and then a gradient of a DCM/MeOH mixture (from 99/1; v/v to 98/2; v/v) as the eluent to give 1.3 g of the expected product.

104 Proton NMR spectrum at 200 MHz in DMSO-d 6 6: 1.1 to 2.3 ppm u 4H 3.65 ppm AB system 2H 3.8 to 4.4 ppm u 4H 7.2 to 8.05 ppm u 8H 8.2 ppm s 1H Preparation 1.15 6-[2-(Benzoyloxy)ethyl]-6-(3,4-difluorophenyl)morpholin-3-one, isomer A) 4-(Benzoyloxy)-2-(3,4-difluorophenyl)-2-hydroxybutylamine, isomer A solution of 41 g of L-(+)-tartaric acid in 1200 ml of MeOH is heated to the reflux temperature, a solution of 81.4 g of the compound obtained in step E of Preparation 1.10, in the form of the free base, in 200 ml of MeOH is then added all at once and the mix- S..ture is left to crystallize for 48 hours while the temperature is allowed to return to RT. The crystals formed are wrung and washed with ether to give 42.5 g of the tartaric acid salt.

[a]o 2 0 +36.2' (c 1; DMF) The resulting salt is recrystallized from 1450 ml of 70' EtOH to give 35 g of the tartaric acid salt after the crystals formed have been wrung and washed with ether.

+38.9° (c 1; DMF) The resulting salt is taken up with 2000 ml of AcOEt, 40 ml of 10% Na 2 CO, solution are added and then, after stirring and decantation, the organic phase is washed with water and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 23.5 g of the expected product after crystallization from an iso ether/pentane mixture. M.p. 100.5-100.6"C.

+42.5 (c 1; MeOH) 105 B) N-(2-Chloroacetyl)-4-(benzoyloxy)-2-(3,4-difluorophenyl)-2-hydroxybutylamine, isomer A solution of 23.5 g of the compound obtained in the previous step and 8.1 g of triethylamine in 300 ml of DCM is cooled to 0°C, a solution of 8.3 g of chloroacetyl chloride in 50 ml of DCM is added dropwise and the reaction mixture is stirred for 30 minutes at 0°C. It is concentrated under vacuum, the residue is extracted with an AcOEt/ether mixture (50/50; the organic phase is washed with a buffer solution of pH 2 and dried over MgSO, and the solvent is evaporated off under vacuum to give 24.8 g of the expected product after crystallization from an iso ether/pentane mixture.

[a] 2 0 +26.1' (c 1; MeOH) C) 6-[2-(Benzoyloxy)ethyl]-6-(3,4-difluorophenyl)morpholin-3-one, isomer A solution of 23.6 g of the compound obtained in the previous step in 750 ml of THF is cooled to 0°C, 13.7 g of potassium tert-butylate are added and the reaction mixture is stirred for 15 minutes. It is concentrated under vacuum, the residue is extracted with AcOEt, the organic phase is washed with a buffer solution of pH 2 and with water and dried over MgSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (from 100/1; v/v to 100/1.5; v/v) as the eluent to give 14.5 g of the expected product after crystallization from pentane.

[a].2o -7.1 (c 1; MeOH) 106 Preparation 1.16 6-[2-(Benzoyloxy)ethyl]-6-(3,4-difluorophenyl)morpholin-3-one, isomer A) 4 -(Benzoyloxy)-2-(3,4-difluorophenyl)-2-hydroxybutylamine, isomer The wringing and wash liquors obtained from the crystallization and then recrystallization of the tartaric acid salt prepared in step A of Preparation 1.15 are concentrated under vacuum. The residue is treated with 10% Na 2 CO, solution and extracted with AcOEt, the organic phase is dried over MgSO 4 and the solvent is evaporated off under vacuum to give 49 g of the amino alcohol in the form of a mixture of isomers.

The amino alcohol is dissolved in 120 ml of MeOH and 1 5 this solution is added all at once to a refluxing solution of 24.1 g of D-(-)-tartaric acid in 730 ml of MeOH. The mixture is left to crystallize for 48 hours S. while the temperature is allowed to return to RT. The crystals formed are wrung and washed with ether to give 40.7 g of the tartaric acid salt.

The resulting salt is recrystallized from 1445 ml of 70' EtOH to give 35 g of the tartaric acid salt after the crystals formed have been wrung and washed with ether. The resulting salt is taken up with 2000 ml of AcOEt, 10% NaCO, solution is added and then, after stirring and decantation, the organic phase i: s washed with water and dried over MgSO, and the solvent is evaporated off under vacuum to give 27 g of the expected product. M.p. 102°C.

[a]o20 -40.5' (c 1; MeOH) B) N-( 2 -Chloroacetyl)-4-(benzoyloxy)-2-(3,4-difluorophenyl)-2-hydroxybutylamine, isomer A solution of 27 g of the compound obtained in the previous step and 13 ml of triethylamine in 500 ml of DCM is cooled to -30'C, 5.8 g of chloroacetyl 107 chloride are added dropwise and the reaction mixture is stirred for 15 minutes. It is then washed with water, with 1 N HC1 solution and with 10% Na2CO3 solution, the organic phase is dried over MgSO 4 and the solvent is evaporated off under vacuum to give 28.6 g of the expected product after crystallization from an iso ether/pentane mixture. M.p. 63'C.

-31.5° (c 1; MeOH) C) 6-[2-(Benzoyloxy)ethyl]-6-(3,4-difluorophenyl)morpholin-3-one, isomer A solution of 28.5 g of the compound obtained in the previous step in 250 ml of THF is cooled to 0 C, 18.5 g of potassium tert-butylate are added all at once and the reaction mixture is stirred for 15 minutes. It is poured into 1000 ml of a buffer solution of pH 2 and extracted with ether, the organic phase is dried over MgSO, and the solvent is evaporated off under vacuum to give 20.5 g of the expected product after crystallization from an ether/iso ether mixture.

M.p. 92 C.

2 0 +8.20 (c 1; MeOH) Preparation 1.17 2-[2-(Benzoyloxy)ethyl]-2-(3,4-difluorophenyl)morpholine, isomer A solution of 12 g of the compound obtained in Preparation 1.15 isomer) in 75 ml of THF is added dropwise at RT to 100 ml of a 1 M solution of borane in THF and the reaction mixture is stirred for 30 minutes at RT. It is then refluxed for 3 hours, 40 ml of a 1 M solution of borane in THF are added and reflux is continued for 30 minutes. 80 ml of boiling MeOH are added and reflux is continued for 30 minutes. The reaction mixture is cooled in an ice bath, 30 ml of a saturated solution of gaseous HC1 in ether are added and the reaction mixture is stirred overnight at RT. It is 108 concentrated under vacuum, the residue is taken up with NaCO, solution and extracted with ether, the organic phase is washed with water and with saturated NaCI solution and dried over MgSO, and the solvent is evaporated off under vacuum to give 11.2 g of the expected product in the form of an oil.

Preparation 1.18 2-[2-(Benzoyloxy)ethyl]-2-(3,4-difluorophenyl)morpholine, isomer A mixture of 19.9 g of the compound obtained in Preparation 1.16 isomer) and 300 ml of a 1 M solution of borane in THF is heated at 60°C for 2 hours. 60 ml of boiling MeOH are added and reflux is continued for 30 minutes. The reaction mixture is 5 cooled to 10"C, 50 ml of a solution of gaseous HC1 in ether are added and the reaction mixture is left to stand overnight at RT. It is concentrated under vacuum, the residue is taken up with 300 ml of Na2CO, solution, 300 ml of ether are added and the mixture is stirred for 30 minutes. After decantation, the organic phase is dried over MgSO 4 and the solvent is evaporated off under vacuum to give 20 g of the expected product in the form of an oil.

Preparation 1.19 2 -[2-(Benzoyloxy)ethyl]-2-(3,4-dichlorophenyl)morpholine A solution of 6 g of the compound obtained in Preparation 1.4 in 30 ml of THF is added dropwise at RT to 76 ml of a 1 M solution of borane in THF and the mixture is then refluxed for 4 hours. 30 ml of MeOH are added dropwise and reflux is continued for minutes. The reaction mixture is cooled to O'C, 30 ml of a saturated solution of gaseous HC1 in ether are added and the reaction mixture is stirred overnight at RT. It is concentrated under vacuum, the residue is 109 taken up with 10% Na 2

CO

3 solution and extracted with ether, the organic phase is washed with 10% NaCO 3 solution and with water and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 5 g of the expected product.

Preparation 1.20 5-[2-(Benzoyloxy)ethyl]-5-(3,4-difluorophenyl)oxazolidin-2-one, isomer A mixture of 4 g of the compound obtained in step A of Preparation 1.16 isomer) and 2.2 g of l,l'-carbonyldiimidazole in 40 ml of DCM is stirred for minutes at RT and then refluxed for 1 hour. After cooling to RT, the reaction mixture is washed twice with 1 N HC1 solution, the organic phase is dried over 15 MgSO 4 and the solvent is evaporated off under vacuum to give 4.18 g of the expected product after crystallization from iso ether. M.p. 147'C.

S

[a]D20 -62.2° (c 1; DMF) Preparation 1.21 2 -[2-(Benzoyloxy)ethyl]-2-(3,4-difluorophenyl)morpholine 48 g of the compound obtained in Preparation 1.10 are added in portions at RT to 700 ml of a 1 M solution of borane in THF and the mixture is then heated at 60"C for 2 hours. 150 ml of MeOH are added dropwise and heating is continued for 30 minutes. The reaction mixture is cooled to 10"C, 120 ml of a saturated solution of hydrochloric acid in ether are added and the reaction mixture is left to stand overnight at RT. It is concentrated under vacuum, the residue is taken up with 600 ml of saturated NaCO, solution and 500 ml of ether and the mixture is stirred for 1 hour at RT. After decantation, the organic phase is washed with water and dried over MgSO, and the solvent is evaporated off under vacuum. The residue is taken up 110 with 400 ml of propan-2-ol, 15 g of fumaric acid are added, the mixture is stirred for 30 minutes and the precipitate formed is wrung. It is taken up with 400 ml of 10% NaCO, solution and extracted with ether, the organic phase is dried over MgSO 4 and the solvent is evaporated off under vacuum to give 22 g of the expected product in the form of an oil.

Preparation 1.22 5-[2-(Benzoyloxy)ethyl]-5-(3,4-dichlorophenyl)oxazolidine 4 g of 37% aqueous formaldehyde solution are added to a solution of 9 g of the compound obtained in step A of Preparation 1.7 (in the form of the free base) in 100 ml of THF and the mixture is then refluxed for 30 minutes and stirred overnight at RT. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and dried over Na 2

SO

4 and the solvent is evaporated off under vacuum to give 9 g of the expected product.

20 Proton NMR spectrum at 200 MHz in DMSO-d 6 6 2.4 ppm mt 2 H 3.2 ppm mt 2H 3.8 to ppm u 4H 7.0 to 8.0 ppm u 8H.

Preparation 1.23 5-[2-(Benzoyloxy)ethyl]-5-(3,4-difluorophenyl)oxazolidin-2-one, isomer This compound is prepared by the procedure described in Preparation 1.20 from the compound obtained in step A of Preparation 1.15 isomer).

2 0 +61" (c 1; DMF) Preparation 2.1 4-Phenyl-4-(pyrrolidin-l-ylcarbonyl)piperidine hemihydrate A) l-tert-Butoxycarbonyl-4-carboxy-4-phenylpiperidine ml of water and 32.9 g of KCO, are added to a mixture of 30 g of 4-carboxy-4-phenylpiperidine ptoluenesulfonate and 300 ml of dioxane, the resulting mixture is then heated to 60"C and 18.2 g of di-tertbutyl dicarbonate are added dropwise. The reaction 111 mixture is then heated at 60°C for 2 hours and under reflux for 30 minutes. After cooling to RT, it is concentrated under vacuum, the residue is extracted with DCM, the organic phase is washed with a buffer solution of pH 2, acidified to pH 4 by the addition of 2 N HC1, washed with a buffer solution of pH 2, with water and with saturated NaCI solution and dried over MgSO, and the solvent is evaporated off under vacuum to give 23.7 g of the expected product.

B) l-tert-Butoxycarbonyl-4-(pyrrolidin-l-ylcarbonyl)-4phenylpiperidine 9.29 g of triethylamine and then 3.27 g of pyrrolidine are added to a solution of 14 g of the compound obtained in the previous step in 200 ml of DCM. The mixture is cooled in an ice bath, 22.4 g of BOP are added and the reaction mixture is stirred while the temperature is allowed to rise to RT. It is concentrated under vacuum, the residue is extracted with DCM, the organic phase is washed with water, three times with 10% NaOH solution, with water and three times with saturated NaCl solution and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 16.4 g of the expected product.

C) 4 -Phenyl-4-(pyrrolidin-l-ylcarbonyl)piperidine hemihydrate Concentrated HC1 solution is added to a solution of 16.4 g of the compound obtained in the previous step in 200 ml of MeOH until the pH is 1, and the reaction mixture is stirred for 5 hours at RT. It is concentrated under vacuum, the residue is taken up with acetone and the solvent is evaporated off under vacuum to give a white solid, which is recrystallized from propan-2-ol. The product obtained is taken up with NaOH solution and extracted with DCM, the organic phase is washed with 10% NaOH solution and with saturated 112 NaCl solution and dried over MgSO, and the solvent is evaporated off under vacuum to give 7 g of the expected product after crystallization from ether. M.p.

126 0

C.

Preparation 2.2 4-(N',N'-Dimethylureido)-4-phenylpiperidine ptoluenesulfonate hemihydrate A) 4 -Acetamido-l-benzyl-4-phenylpiperidine This compound is prepared by reacting acetonitrile with l-benzyl-4-hydroxy-4-phenylpiperidine by the method described in EP-A-474561.

B) 4 -Amino-l-benzyl-4-phenylpiperidine dihydrochloride A mixture of 30 g of the compound obtained in the previous step and 58 ml of concentrated HC1 solution in 135 ml of water is refluxed for 48 hours. The reaction mixture is concentrated under vacuum, the Sresidue is taken up with an EtOH/toluene mixture and S' the solvents are evaporated off under vacuum. The residue is dissolved in 50 ml of MeOH and crystallized by the addition of 250 ml of acetone to give 30.5 g of the expected product after wringing and drying.

C) l-Benzyl-4-(N',N'-dimethylureido)-4-phenylpiperidine A solution of 1.9 g of N,N-dimethylcarbamoyl chloride in 10 ml of 1,2-dichloroethane is added dropwise at RT to a solution of 6 g of the compound obtained in the previous step and 7.14 g of triethylamine in 50 ml of 1,2-dichloroethane and the mixture is refluxed for 8 hours. A few more drops of N,N-dimethylcarbamoyl chloride are added and reflux is continued for 3 hours. The reaction mixture is concentrated under vacuum, the residue is extracted with DCM, the organic phase is washed with water, with NaOH solution, with water and with saturated NaCl solution and dried over MgSO, and the solvent is evaporated off under vacuum. The residue is chro- 113 matographed on silica using a gradient of a DCMMeOH mixture (from 99/1; v/v to 96/4; v/v) as the eluent to give 1.8 g of the expected product.

D) 4-(N',N'-Dimethylureido)-4-phenylpiperidine ptoluenesulfonate hemihydrate A mixture of 1.8 g of the compound obtained in the previous step, 1.11 g of p-toluenesulfonic acid monohydrate and 0.2 g of 10% palladium-on-charcoal in 150 ml of 95° EtOH is hydrogenated at 40 0 C and at atmospheric pressure. The catalyst is filtered off on Cdlite® and the filtrate is evaporated under vacuum.

SThe residue is taken up with acetone and the solvent is o evaporated off under vacuum. The product obtained is dissolved in 25 ml of acetone, this solution is added 15 slowly to 200 ml of ether and the crystalline product S: formed is wrung to give 1.86 g of the expected product.

M.p. 120-122*C.

Preparation 2.3 4-(Acetyl-N-methylamino)-4-phenylpiperidine p-toluenesulfonate A) l-Benzyl-4-(formylamino)-4-phenylpiperidine 110 ml of acetic anhydride are added dropwise to a solution of 48.9 g of the compound obtained in step B of Preparation 2.2 and 25 g of sodium formate in 25 340 ml of formic acid and the reaction mixture is stirred overnight at RT. It is concentrated under vacuum, the residue is taken up with water, rendered alkaline by the addition of concentrated NaOH solution and extracted with DCM, the organic phase is dried over MgSO, and the solvent is evaporated off under vacuum to give 38.8 g of the expected product after crystallization from an iso ether/pentane mixture. M.p. 140'C.

B) l-Benzyl-4-(methylamino)-4-phenylpiperidine A solution of 38.8 g of the compound obtained in the previous step in 400 ml of THF is added slowly 114 to a suspension of 12.5 g of lithium aluminum hydride in 100 ml of THF and the mixture is refluxed for 3 hours. After cooling, a solution of 5 ml of concentrated NaOH in 45 ml of water is added to the reaction mixture, the mineral salts are filtered off and the filtrate is concentrated under vacuum to give 38 g of the expected product.

C) 4-(Acetyl-N-methylamino)-l-benzyl-4-phenylpiperidine A solution of 30 g of the compound obtained in the previous step and 16.5 ml of triethylamine in 300 ml of DCM is cooled to 0-5°C, 8 ml of acetyl chloride are added dropwise and the reaction mixture is stirred for 30 minutes at RT. It is washed twice with water and with 2 N NaOH solution, the organic phase is dried 15 over MgSO 4 and the solvent is evaporated off under vacuum to give 31.6 g of the expected product after crystallization from an iso ether/pentane mixture.

M.p. 104°C.

D) 4-(Acetyl-N-methylamino)-4-phenylpiperidine ptoluenesulfonate A mixture of 5 g of the compound obtained in the previous step, 2.9 g of p-toluenesulfonic acid monohydrate, 0.5 g of 10% palladium-on-charcoal and Sml of EtOH is hydrogenated for 3 hours at 25'C and at 25 atmospheric pressure. The catalyst is filtered off and the filtrate is concentrated under vacuum to give 5.7 g of the expected product after crystallization from acetone. M.p. 165°C.

Preparation 2.4 4-(Ethoxycarbonylamino)-4-phenylpiperidine trifluoroacetate A) l-tert-Butoxycarbonyl-4-isocyanato-4-phenylpiperidine A solution of 25 g of the compound obtained in step A of Preparation 2.1 and 10.35 g of triethylamine 115 in 100 ml of acetone is cooled to 0-5°C, a solution of 8.7 g of methyl chloroformate in 30 ml of acetone is added dropwise at a temperature below 5°C and the mixture is stirred for 30 minutes at 50C. A solution of 10.66 g of sodium azide in 30 ml of water is then added dropwise at a temperature below 5 0 C and the reaction mixture is stirred for 30 minutes at 5°C. It is poured into 500 ml of iced water and extracted four times with toluene and the organic phase is washed twice with a buffer solution of pH 2 and with saturated NaCl solution, dried over MgSO, and filtered. The filtrate is heated at 90°C for 1 hour and the solvent is evaporated off under vacuum to give 18.9 g of the expected product in the form of an oil.

15 B) l-tert-Butoxycarbonyl-4-(ethoxycarbonylamino)-4phenylpiperidine A solution of 6.28 g of the compound obtained in the previous step in 100 ml of EtOH is refluxed for 5 hours 30 minutes. Two drops of triethylamine are added and the mixture is then stirred overnight at RT and concentrated under vacuum to give 7.25 g of the expected product.

C) 4-(Ethoxycarbonylamino)-4-phenylpiperidine trifluoroacetate A solution of 7.25 g of the compound obtained in the previous step in 20 ml of TFA is stirred for minutes at RT and then concentrated under vacuum. The residue is taken up with acetone and the solvent is evaporated off under vacuum to give 6.02 g of the expected product after crystallization from an acetone/ ether mixture. M.p. 173"C.

Preparation 4-Benzylquinuclidine A) 1,4-Dibenzyl-4-cyanopiperidine A solution of 15 g of 4-cyanopiperidine in 250 116 ml of THF is cooled to -50°C, 190 ml of a 1.5 M solution of lithium diisopropylamide in cyclohexane are added dropwise and the mixture is stirred for minutes at -50°C. 34 ml of benzyl bromide are then added and the mixture is stirred for 3 hours after the temperature has been allowed to rise to RT. The reaction mixture is poured into an ice/concentrated HC1 mixture, ether is added and the precipitate formed is wrung and washed with water. The precipitate is taken up with water, rendered alkaline to pH 12 by the addition of concentrated NaOH solution and extracted with ether, the organic phase is dried over MgSO, and I the solvent is evaporated off to give 31.7 g of the expected product after crystallization from pentane.

*Co* 15 M.p. 92'C.

B) 4-Acetyl-l,4-dibenzylpiperidine hydrochloride ml of a 1.6 M solution of methyllithium in ether are added to a solution of 20 g of the compound obtained in the previous step in 400 ml of ether and 20 the reaction mixture is stirred for 3 hours at RT. It Sis poured into iced water, the organic phase is decanted and then dried over MgSO, and the solvent is evaporated off under vacuum. The residue is taken up with 400 ml of water and 40 ml of concentrated HC1 and 25 refluxed for 2 hours. After one night at RT, the crystals formed are wrung, washed with acetone and then with ether and dried to give 17.6 g of the expected product. M.p. 246°C.

C) 1,4-Dibenzyl-4-(2-bromoacetyl)piperidine hydrobromide 1.6 ml of bromine are added to a solution of g of the compound obtained in the previous step in ml of acetic acid and the reaction mixture is stirred overnight at RT. 50 ml of ether are added and the crystals formed are wrung and washed with an 117 acetone/ether mixture and then with ether to give 12.5 g of the expected product. M.p. 205°C.

D) 1,4-Dibenzyl-3-oxoquinuclidinium bromide Concentrated NaOH solution is added to an aqueous suspension of 12.5 g of the compound obtained in the previous step until the pH is 12, the mixture is extracted with ether, the organic phase is dried over MgSO, and the solvent is evaporated off under vacuum.

The residue is taken up with acetone and stirred for 2 hours at RT. The precipitate is wrung, washed with ether and dried to give 10.08 g of the expected product. M.p. 234°C.

E) 4-Benzyl-3-oxoquinuclidine A mixture of 10 g of the compound obtained in *9 the previous step and 1 g of 10% palladium-on-charcoal in 200 ml of MeOH is hydrogenated at RT and at atmospheric pressure. The catalyst is filtered off and the filtrate is evaporated under vacuum. The residue is taken up with ether and the precipitate formed is 20 wrung. The precipitate is dissolved in water and rendered alkaline to pH 12 by the addition of concentrated NaOH solution and the precipitate formed is wrung, washed with water and dried to give 5 g 5. 9 of the expected product. M.p. 111'C.

F) 4-Benzylquinuclidine A mixture of 5 g of the compound obtained in the previous step, 2.5 g of hydrazine hydrate and 4.3 g of KOH in 25 ml of ethylene glycol is heated at 175C for 2 hours. The reaction mixture is poured into iced water and extracted twice with ether, the organic phase is washed with water and dried over MgSO, and the solvent is evaporated off under vacuum. The residue is dissolved in acetone and acidified to pH 1 by the addition of a saturated solution of hydrochloric acid in ether and the precipitate formed is wrung and 118 washed with an acetone/ether mixture (50/50; v/v) and then with ether. The precipitate is dissolved in water, rendered alkaline to pH 12 by the addition of concentrated NaOH solution and extracted with ether, the extract is dried over MgSO 4 and the solvent is evaporated off under vacuum to give 1.8 g of the expected product. M.p. 48°C.

Preparation 2.6 4-Phenyl-4-(pyrrolidin-l-ylcarbonylamino)piperidine benzenesulfonate A) l-(Benzyloxycarbonyl)- 4 -carboxy-4-phenylpiperidine A mixture of 37.7 g of 4-carboxy-4-phenylpiperidine p-toluenesulfonate, 53.3 g of 30% aqueous NaOH solution and 250 ml of water is cooled to 5'C. A 1 5 solution of 18 g of benzyl chloroformate in 60 ml of acetone is added rapidly at 5°C and the reaction •mixture is stirred overnight while the temperature is allowed to rise to RT. It is washed twice with ether and, after decantation, the aqueous phase is acidified e 20 to pH 1 by the addition of concentrated HC1 and then 2 N HC1. The precipitate formed is wrung, dried, taken up with ether and wrung again to give 30.6 g of the expected product. M.p. 142-144'C.

B) l-(Benzyloxycarbonyl)-4-phenyl-4-(pyrrolidin-1-ylcarbonylamino)piperidine A mixture of 33.9 g of the compound obtained in the previous step and 47.6 g of thionyl chloride in 200 ml of 1, 2 -dichloroethane is refluxed for 1 hour. The reaction mixture is concentrated under vacuum, the residue is taken up with acetone and the solvent is evaporated off under vacuum. The residue is dissolved in 200 ml of acetone and cooled to 5'C, a solution of 13 g of sodium azide in 50 ml of water is added dropwise and the mixture is stirred for 1 hour. 100 ml of acetone are evaporated off under vacuum at RT, satura-

INI

119 ted NaHCO, solution is added to the remaining solution, the mixture is extracted with toluene, the organic phase is washed with water and with saturated NaCI solution and dried over Na 2 SO, and 50% by volume of the solvent is evaporated off. The remaining toluene solution is refluxed for 30 minutes and then concentrated under vacuum. The residue is taken up with 200 ml of ether, a solution of 7.1 g of pyrrolidine in 20 ml of ether is added dropwise and the mixture is stirred for 5 minutes. It is concentrated under vacuum, the residue is extracted with DCM, the organic phase is washed with 2 N HC1 solution, with 5% NaHCO 3 solution and with saturated NaCl solution and dried over NaSO, and the solvent is evaporated off under vacuum. The residue is dissolved in 40 ml of hot AcOEt, 200 ml of ether are S* added and the crystalline product formed is wrung to give 31.4 g of the expected product.

C) 4-Phenyl-4-(pyrrolidin-l-ylcarbonylamino)piperidine benzenesulfonate S. 20 A mixture of 29 g of the compound obtained in the previous step, 11.27 g of benzenesulfonic acid, 2 g of 10% palladium-on-charcoal and 250 ml of EtOH is e 4 Shydrogenated at 40'C and at atmospheric pressure. The catalyst is filtered off on Cdlite® and the filtrate is 25 concentrated under vacuum. The residue is crystallized from an EtOH/acetone mixture to give 29.4 g of the expected product. M.p. 185°C.

Preparation 2.7 4-[2-(Dimethylamino)thiazol-4-yl]-4-phenylpiperidine p-toluenesulfonate A) 1,l-Dimethylthiourea A solution of 10.67 g of potassium thiocyanate in 100 ml of acetone is cooled in an ice bath, a solution of 12.06 g of pivaloyl chloride in 30 ml of acetone is added dropwise and the reaction mixture is 120 stirred for 30 minutes while the temperature is allowed to rise to RT. It is cooled to -10°C, 17.9 ml of a 5.6 N solution of dimethylamine in MeOH are added dropwise and the mixture is stirred while the temperature is allowed to rise to RT. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed twice with water and with saturated NaCl solution and dried over MgSO, and the solvent is evaporated off under vacuum. The product obtained is taken up with 50 ml of concentrated HCl solution and refluxed for 1 hour. After cooling to RT, the reaction mixture is washed twice with ether, the aqueous phase is rendered alkaline to pH 9 by the addition of NaOH solution and extracted with DCM, the organic phase is washed with 5% NaOH solution and with saturated NaCl solution and dried over MgSO 4 and the solvent is evaporated off under vacuum. The residue is taken up with ether and the precipitate formed is wrung o. to give 6.7 g of the expected product.

20 B) 4-(2-Bromoacetyl)-4-phenylpiperidine hydrobromide 7.9 g of bromine are added rapidly at RT to a suspension of 14 g of 4-acetyl-4-phenylpiperidine hydrobromide in 200 ml of DCM and the reaction mixture S. is stirred overnight at RT. It is diluted by the addition of 200 ml of ether and the precipitate formed is wrung and washed with ether to give 16.7 g of the expected product after drying under vacuum.

C) 4-[2-(Dimethylamino)thiazol-4-yl]-4-phenylpiperidine p-toluenesulfonate A mixture of 7.26 g of the compound obtained in step B) and 2.08 g of the compound obtained in step A) in 150 ml of EtOH is refluxed for 1 hour 30 minutes.

After cooling to RT, the mixture is concentrated under vacuum, the residue is taken up with water, rendered alkaline to pH 10 by the addition of 10% NaOH solution 121 and extracted with DCM, the organic phase is washed with 10% NaOH solution and with saturated NaCl solution and dried over MgSO 4 and the solvent is evaporated off under vacuum. The product obtained is dissolved in acetone, a solution of 3.31 g of p-toluenesulfonic acid monohydrate in 10 ml of acetone is added dropwise and the crystalline product formed is wrung to give 6.1 g of the expected product. M.p. 164*C.

Preparation 2.8 4-(Morpholin-4-ylcarbonylamino)-4-phenylpiperidine p-toluenesulfonate monohydrate A) l-tert-Butoxycarbonyl-4-(morpholin-4-ylcarbonylamino)-4-phenylpiperidine A solution of 1.74 g of morpholine in 10 ml of acetone is added dropwise at RT to a solution of 6 g of the compound obtained in step A of Preparation 2.4 in 100 ml of acetone. The reaction mixture is concentrated under vacuum, the residue is extracted with AcOEt, the organic phase is washed with a buffer solution of pH 2 and with saturated NaCl solution and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 7.1 g of the expected product.

B) 4-(Morpholin-4-ylcarbonylamino)-4-phenylpiperidine p-toluenesulfonate monohydrate 15 ml of concentrated HCl solution are added to a solution of 7.1 g of the compound obtained in the previous step in 100 ml of MeOH and the reaction mixture is stirred overnight at RT. It is concentrated under vacuum, the residue is taken up with water, rendered alkaline to pH 10 by the addition of concentrated NaOH solution and extracted three times with DCM, the combined organic phases are washed with saturated NaCl solution and dried over MgSO, and the solvent is evaporated off under vacuum. The product obtained is dissolved in acetone, a solution of 3.46 g 122 of p-toluenesulfonic acid monohydrate in 10 ml of acetone is added dropwise and the mixture is concentrated under vacuum. The residue is taken up with ether and the precipitate formed is wrung to give 7 g of the expected product. M.p. 93'C.

Preparation 2.9 4-Phenyl-4-(pyrrolidin-1-ylaminocarbonyl)piperidine benzenesulfonate A) 1-(Benzyloxycarbonyl)-4-phenyl-4-(pyrrolidin-1ylaminocarbonyl)piperidine benzenesulfonate A mixture of 11.54 g of the compound obtained in step A of Preparation 2.6 and 100 ml of 1,2-dichloroethane is heated to the reflux temperature, 16.18 g of thionyl chloride are then added and the reaction mixture is refluxed for 1 hour and stirred overnight at RT. It is concentrated under vacuum, the residue is dissolved in 100 ml of DCM and cooled to 5°C and 10.3 g of triethylamine and then 5 g of l-aminopyrrolidine hydrochloride are added successively. After stirring 20 for 1 hour, the reaction mixture is concentrated under vacuum, the residue is extracted with AcOEt, the organic phase is washed with water and with saturated NaCl solution and dried over MgSO 4 and the solvent is evaporated off under vacuum. The product obtained is dissolved in acetone, ether is added until precipitation occurs, and the precipitate formed is wrung.

The precipitate is dissolved in EtOH, 2.61 g of benzenesulfonic acid are added and the precipitate formed is wrung to give 9.34 g of the expected product.

B) 4-Phenyl-4-(pyrrolidin-l-ylaminocarbonyl)piperidine benzenesulfonate A mixture of 9.34 g of the compound obtained in the previous step, 1 g of 5% palladium-on-charcoal and 200 ml of EtOH is hydrogenated for 3 hours at 40°C and 123 at atmospheric pressure. The catalyst is filtered off and the filtrate is concentrated under vacuum to give 6.13 g of the expected product after crystallization from an EtOH/acetone mixture.

Preparation 2.10 4-Benzyl-4-(pyrrolidin-l-ylcarbonylamino)piperidine p-toluenesulfonate A) 4-Cyanopiperidine g of isonipecotamide (or piperidine-4carboxamide) are added in small portions to 70 ml of POC1, and the reaction mixture is refluxed for 4 hours.

It is concentrated under vacuum, the residue is taken up with ice, rendered alkaline to pH 13 by the addition of concentrated NaOH solution and extracted with DCM 15 and then 4 times with ether, the combined organic phases are dried over MgSO, and the solvents are evaporated off under vacuum. The oil obtained is distilled under reduced pressure to give 6.4 g of the expected product. B.p. 108-110°C under 2400 Pa.

B) 4-Cyano-l,4-dibenzylpiperidine A solution of 15 g of the compound obtained in the previous step in 250 ml of THF is cooled to 190 ml of a 1.5 M solution of lithium diisopropylamide in cyclohexane are added dropwise and the mixture is stirred for 30 minutes at -50°C. 34 ml of benzyl bromide are then added and the reaction mixture is stirred while the temperature is allowed to rise to RT.

After 3 hours at RT, it is poured into a mixture of ice and concentrated HC1, ether is added and the precipitate formed is wrung and washed with water. The precipitate is taken up with water, rendered alkaline to pH 13 by the addition of concentrated NaOH solution and extracted with ether, the organic phase is dried over MgSO, and the solvent is evaporated off under vacuum to give 31.7 g of the expected product after 124 crystallization from pentane. M.p. 92°C.

C) 1,4-Dibenzyl-4-carboxypiperidine 6 g of the compound obtained in the previous step are added to a solution of 25 ml of water, 25 ml of concentrated H 2 SO, and 25 ml of AcOH and the reaction mixture is heated at 140 C for 5 hours. After cooling, it is poured onto ice, the pH is brought to by the addition of concentrated NaOH solution and the mixture is stirred until crystallization occurs.

The crystalline product is wrung and washed with water.

The product is taken up with MeOH, wrung and washed with ether to give 3 g of the expected product. M.p. 262°C.

D) 1, 4 -Dibenzyl-4-isocyanatopiperidine 1 5 A mixture of 2 g of the compound obtained in the previous step and 1.6 g of phosphorus pentachloride in 40 ml of chloroform is heated at 60'C for 1 hour.

The reaction mixture is concentrated under vacuum, the residue is taken up with 40 ml of acetone, a solution of 2 g of sodium azide in 5 ml of water is added and the mixture is stirred for 30 minutes at RT. It is concentrated under vacuum at RT, the residue is taken up with ether, the organic phase is washed with saturated NaCO, solution and with water and dried over MgSO 4 and the solvent is evaporated off under vacuum.

The residue is taken up with 40 ml of toluene and refluxed for 1 hour. It is concentrated under vacuum to give 2 g of the expected product in the form of an oil.

E) 1, 4 -Dibenzyl-4-(pyrrolidin-l-ylcarbonylamino)piperidine ml of pyrrolidine are added at RT to a solution of 5 g of the compound obtained in the previous step in 50 ml of DCM and the reaction mixture is stirred for 2 hours at RT. It is concentrated under 125 vacuum, the residue is taken up with pentane and the precipitate formed is wrung and washed with pentane to give 4.5 g of the expected product after drying. M.p. 126 0

C.

F) 4 -Benzyl-4-(pyrrolidin-l-ylcarbonylamino)piperidine p-toluenesulfonate A mixture of 4.2 g of the compound obtained in the previous step, 2.1 g of p-toluenesulfonic acid monohydrate, 0.4 g of 10% palladium-on-charcoal and ml of EtOH is hydrogenated for 48 hours at RT and at atmospheric pressure. The catalyst is filtered off on C4lite® and the filtrate is concentrated under vacuum.

The residue is taken up with ether and the precipitate formed is wrung to give 4.99 g of the expected product. M.p. 180°C.

Preparation 2.11 4-(Methoxycarbonylamino)-4-phenylpiperidine ptoluenesulfonate hemihydrate A solution of 6.05 g of the compound obtained 20 in step A of Preparation 2.4 in 100 ml of MeOH is refluxed for 5 hours. 1 drop of triethylamine is added and the mixture is stirred overnight at RT. Concentrated HC1 solution is then added until the pH is 1, and the reaction mixture is concentrated under vacuum.

The residue is taken up with 10% NaOH solution and extracted with DCM, the organic phase is washed with NaOH solution and with saturated NaCl solution and dried over MgSO, and the solvent is evaporated off under vacuum. The product obtained is dissolved in acetone, a solution of 3.57 g of p-toluenesulfonic acid monohydrate in 10 ml of acetone is added dropwise and the mixture is concentrated under vacuum. The product obtained is taken up with ether and the solvent is evaporated off under vacuum to give 7.17 g of the expected product. M.p. 159°C.

126 Preparation 2.12 4-(2-Amino-1,3,4-oxadiazol-5-yl)-4-phenylpiperidine p-toluenesulfonate hemihydrate A) l-(Benzyloxycarbonyl)-4-(chloroformyl)-4-phenylpiperidine A mixture of 17.1 g of the compound obtained in step A of Preparation 2.6 and 24 g of thionyl chloride in 150 ml of 1,2-dichloroethane is refluxed for 1 hour.

It is concentrated under vacuum, the residue is taken up with chloroform and the solvent is evaporated off under vacuum. The residue is taken up with an ether/ pentane mixture and the solvents are evaporated off under vacuum again to give 20 g of the expected product in the form of a gum, which is used as such.

B) 1-(Benzyloxycarbonyl)-4-carbazoyl-4-phenylpiperidine A solution of 16 g of hydrazine monohydrate in S. 40 ml of EtOH is cooled to -50"C, a solution of 11.44 g of the compound obtained in the previous step in 20 ml *of 1,2-dimethoxyethane is added dropwise and the mixture is stirred while the temperature is allowed to rise to RT. It is concentrated under vacuum, the residue is taken up with water and extracted with DCM, the organic phase is washed with water and with saturated NaCl solution and dried over MgSO 4 and the solvent is evaporated off under vacuum. The residue is taken up with an EtOH/benzene mixture and the solvents are evaporated off under vacuum to give 11.2 g of the expected product in the form of a gum, which is used as such.

C) 4 -(2-Amino-l,3,4-oxadiazol-5-yl)-l-(benzyloxycarbonyl)-4-phenylpiperidine A solution of 3.39 g of cyanogen bromide in ml of EtOH is added at RT to a solution of 11.2 g of the compound obtained in the previous step in 60 ml of EtOH and the reaction mixture is refluxed for 1 hour.

It is concentrated to 50 ml of EtOH and water is then 127 added dropwise until the volume of the reaction mixture is 400 ml. The crystalline product formed is wrung and washed with water and then with DCM, with AcOEt and with ether to give 8 g of the expected product.

D) 4-(2-Amino-l,3,4-oxadiazol-5-yl)-4-phenylpiperidine p-toluenesulfonate hemihydrate A mixture of 7.85 g of the compound obtained in the previous step, 3.95 g of p-toluenesulfonic acid monohydrate, 0.8 g of 10% palladium-on-charcoal, 350 ml of 95" EtOH and 10 ml of water is hydrogenated at and at atmospheric pressure. After 3 hours, the catalyst is filtered off on Celite® and the filtrate is concentrated under vacuum. The residue is taken up with acetone and the crystalline product formed is wrung and washed with acetone and then with S* ether to give 7.65 g of the expected product. M.p. 183-185'C.

Preparation 2.13 4-[(Acetyl-N-methylamino)methyl]-4-phenyl- 20 piperidine p-toluenesulfonate A) 4-(Aminomethyl)-l-benzyl-4-phenylpiperidine A suspension of 2.8 g of lithium aluminum hydride in 50 ml of THF is cooled to 0°C and a solution of 20 g of l-benzyl-4-cyano-4-phenylpiperidine in 50 ml of THF is added dropwise. The reaction mixture is stirred for 1 hour at RT and then heated for 1 hour at 40 C. It is cooled in an ice bath and 3 ml of water, 3 ml of 4 N NaOH solution and 12 ml of water are added successively. The mineral salts are filtered off and the filtrate is evaporated under vacuum. The residue is chromatographed on silica H using a gradient of a DCM/MeOH mixture (from 100/3; v/v to 100/10; v/v) as the eluent to give 11 g of the expected product.

128 B) l-Benzyl-4-[(N-formylamino)methyl]-4-phenylpiperidine ml of acetic anhydride are added dropwise at RT to a mixture of 11 g of the compound obtained in the previous step in 76 ml of formic acid and the reaction mixture is then stirred for 5 hours. It is concentrated under vacuum, the residue is taken up with water, rendered alkaline to pH 14 by the addition of concentrated NaOH and extracted with ether, the extract is washed with water and dried over NaSO, and the solvent is evaporated off under vacuum to give 12 g of the expected product.

C) l-Benzyl-4-[(N-methylamino)methyl]-4-phenylpiperidine A suspension of 3.9 g of lithium aluminum S: hydride in 50 ml of THF is heated to 40 0 C, a solution Sof 12 g of the compound obtained in the previous step in 50 ml of THF is added dropwise and the mixture is *oo then refluxed for 3 hours. After cooling in an ice 20 bath, 4 ml of water, 4 ml of 4 N NaOH solution and 12 ml of water are added successively. The mineral salts are filtered off and the filtrate is concentrated under vacuum. The residue is extracted with ether, the extract is dried over NaSO 4 and the solvent is evaporated off under vacuum to give 10 g of the expected product.

D) 4-[(Acetyl-N-methylamino)methyl]-l-benzyl-4-phenylpiperidine 0.863 g of acetyl chloride is added to a solution of 3.3 g of the compound obtained in the previous step and 1.4 g of triethylamine in 50 ml of DCM and the reaction mixture is stirred for 2 hours at RT. It is concentrated under vacuum, the residue is taken up with water and extracted with ether, the extract is washed with water and dried over NaSO 4 and the solvent is 129 evaporated off. The residue is chromatographed on silica H using a DCM/MeOH mixture (100/3; v/v) as the eluent to give 2.4 g of the expected product.

E) 4-[(Acetyl-N-methylamino)methyl]-4-phenylpiperidine p-toluenesulfonate A mixture of 2.3 g of the compound obtained in the previous step, 1.2 g of p-toluenesulfonic acid monohydrate, 0.23 g of 10% palladium-on-charcoal and 100 ml of MeOH is hydrogenated at RT and at atmospheric pressure. The catalyst is filtered off and the filtrate is evaporated under vacuum to give 2.7 g of the expected product after trituration in ether and wringing.

Preparation 2.14 15 4-[(Ethoxycarbonyl-N-methylamino)methyl]-4phenylpiperidine p-toluenesulfonate A) l-Benzyl-4-[(ethoxycarbonyl-N-methylamino)methyl]- 4-phenylpiperidine A solution of 0.85 g of ethyl chloroformate in 10 ml of DCM is added dropwise at RT to a solution of 2.3 g of the compound obtained in step C of Preparation 2.13 and 1.03 g of triethylamine in 50 ml of DCM and the reaction mixture is stirred for 30 minutes at RT.

It is concentrated under vacuum, the residue is taken up with water and extracted with ether, the organic phase is washed with water and with saturated NaCl solution and dried over NaSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (100/3; v/v) as the eluent to give 2.3 g of the expected product.

B) 4-[(Ethoxycarbonyl-N-methylamino)methyl]-4-phenylpiperidine p-toluenesulfonate A mixture of 2.3 g of the compound obtained in the previous step, 1.19 g of p-toluenesulfonic acid 130 monohydrate, 0.7 g of 5% palladium-on-charcoal and ml of DCM is hydrogenated at 40"C and at atmospheric pressure. The catalyst is filtered off on Cdlite® and the filtrate is concentrated under vacuum to give 2.7 g of the expected product.

Preparation 2.15 (N',N'-Dimethyl-N-methylureido)methyl]-4phenylpiperidine p-toluenesulfonate A) l-Benzyl-4-[(N',N'-dimethyl-N-methylureido)methyl]- 4-phenylpiperidine A solution of 0.92 g of N,N-dimethylcarbamoyl chloride in 20 ml of DCM is added dropwise at RT to a solution of 2.5 g of the compound obtained in step C of Preparation 2.13 and 1.11 g of triethylamine in 50 ml 15 of DCM and the reaction mixture is then refluxed for 3 hours. It is concentrated under vacuum, the residue is taken up with water and extracted with ether, the organic phase is washed with water and with saturated Na Cl solution and dried over Na 2

SO

4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (100/3; 9 v/v) as the eluent to give 2.92 g of the expected product.

B) 4-[(N',N'-Dimethyl-N-methylureido)methyl]-4-phenylpiperidine p-toluenesulfonate A mixture of 2.92 g of the compound obtained in *t the previous step, 1.52 g of p-toluenesulfonic acid *9 monohydrate, 0.3 g of 10% palladium-on-charcoal and ml of MeOH is hydrogenated at 40°C and at atmospheric pressure. The catalyst is filtered off on Celite® and the filtrate is concentrated under vacuum to give 2.6 g of the expected product after trituration of the residue in a pentane/iso ether mixture, followed by wringing.

131 Preparation 2.16 4-Carbamoyl-4-(piperid-l-yl)piperidine dihydrochloride A) l-Benzyl-4-cyano-4-(piperid-l-yl)piperidine A solution of 5.3 g of sodium cyanide in 20 ml of water is added dropwise at RT to a solution of 18.9 g of l-benzylpiperid-4-one and 12.16 g of piperidine hydrochloride in 25 ml of MeOH and 25 ml of water and the mixture is stirred for 48 hours at RT. The precipitate formed is wrung, washed with water and dried under vacuum to give 27 g of the expected product.

B) l-Benzyl-4-carbamoyl-4-(piperid-l-yl)piperidine 10 g of the compound obtained in the previous 15 step are added to 50 ml of 95% sulfuric acid and the reaction mixture is heated at 100 0 C for 45 minutes.

After cooling to RT, it is poured onto 100 g of ice, 250 ml of DCM are added, with cooling, the organic phase is decanted and dried over MgSO, and the solvent 20 is evaporated off under vacuum. The solid product obtained is recrystallized from 300 ml of an acetonitrile/toluene mixture (65/35; v/v) to give 9.7 g of the expected product. M.p. 150-160'C.

C) 4 -Carbamoyl-4-(piperid-l-yl)piperidine dihydrochloride g of ammonium formate and 2.5 g of palladium-on-charcoal are added to a solution of 9.7 g of the compound obtained in the previous step in 200 ml of MeOH and the mixture is stirred for 2 hours at RT.

It is filtered on Cdlite® and the filtrate is evaporated under vacuum. The residue is dissolved in 2 N HCI solution, rendered alkaline to pH 13 by the addition of NaOH solution and extracted with chloroform, the organic phase is dried over MgSO, and the solvent is evaporated off under vacuum. The product obtained is 132 dissolved in an MeOH/DCM mixture, acidified to pH 1 by the addition of a saturated solution of hydrochloric acid in ether and evaporated under vacuum to give 5 g of the expected product. M.p. 185 0

C.

Preparation 2.17 4-Phenyl-4-ureidopiperidine benzenesulfonate A) 1-(Benzyloxycarbonyl)-4-isocyanato-4-phenylpiperidine A mixture of 50.89 g of the compound obtained in step A) of Preparation 2.6 and 71.4 g of thionyl chloride in 400 ml of 1,2-dichloroethane is refluxed for 1 hour. The reaction mixture is concentrated under vacuum, the residue is taken up with acetone and the solvent is evaporated off under vacuum. The residue is 15 dissolved in 200 ml of acetone and cooled to 5'C, a solution of 19.5 g of sodium azide in 50 ml of water is added dropwise and the mixture is stirred for 2 hours •at RT. The acetone is evaporated off under vacuum at RT, saturated NaHCO 3 solution is added to the remaining 20 solution, the mixture is extracted with toluene, the organic phase is washed with water and with saturated NaCl solution and dried over Na 2

SO

4 and 50% by volume of the solvent is evaporated off. The remaining toluene solution is refluxed for 1 hour and then concentrated under vacuum to give 54 g of the expected product in the form of an orange oil, which crystallizes.

B) l-(Benzyloxycarbonyl)-4-phenyl-4-ureidopiperidine Excess ammonia gas is bubbled at RT into a solution of 29 g of the compound obtained in the previous step in 300 ml of ether and 300 ml of DCM and the reaction mixture is then stirred overnight at RT. It is concentrated under vacuum, the residue is taken up with hot acetone and the temperature is allowed to drop to RT. As soon as the product crystallizes, an ether/ 133 AcOEt mixture is added and the crystals formed are then wrung to give 26.4 g of the expected product.

C) 4-Phenyl-4-ureidopiperidine benzenesulfonate A mixture of 25 g of the compound obtained in the previous step, 11.2 g of benzenesulfonic acid, 3 g of 5% palladium-on-charcoal and 300 ml of EtOH is hydrogenated at 40°C and at atmospheric pressure. The reaction mixture is diluted by the addition of water and MeOH, the catalyst is filtered off on Celite® and the filtrate is concentrated under vacuum to give 26.45 g of the expected product after crystallization from acetone. M.p. 235°C.

Preparation 2.18 4-(N'-Methylureido)-4-phenylpiperidine benzene- 15 sulfonate A) 1-(Benzyloxycarbonyl)-4-(N'-methylureido)-4-phenylpiperidine A solution of 25 g of the compound obtained in step A of Preparation 2.17 in 300 ml of ether is cooled :20 to 5°C and excess gaseous methylamine is bubbled in.

The reaction mixture is diluted by the addition of 150 ml of DCM and stirred overnight at RT. It is concentrated under vacuum, the residue is taken up with hot AcOEt and the temperature is allowed to return to RT.

Ether is added until precipitation occurs, and the precipitate formed is wrung to give 24 g of the expected product.

B) 4-(N'-Methylureido)-4-phenylpiperidine benzenesulfonate A mixture of 23 g of the compound obtained in the previous step, 9.9 g of benzenesulfonic acid, 3 g of 5% palladium-on-charcoal and 300 ml of 95° EtOH is hydrogenated at 40°C and at atmospheric pressure. The catalyst is filtered off on Celite* and the filtrate is concentrated under vacuum. The residue is taken up 134 with acetone and the precipitate formed is wrung to give 22.36 g of the expected product. M.p. 227°C.

Preparation 2.19 4-(3,3-Dimethylcarbazoyl)-4-phenylpiperidine p-toluenesulfonate A) l-(Benzyloxycarbonyl)-4-(3,3-dimethylcarbazoyl)-4phenylpiperidine p-toluenesulfonate A solution of 7.15 g of the compound obtained in step A of Preparation 2.12 in 60 ml of DCM is cooled to 5°C, a solution of 1.44 g of 1,1-dimethylhydrazine and 4.04 g of triethylamine in 20 ml of DCM is added dropwise and the reaction mixture is stirred overnight •at RT. It is concentrated under vacuum, the residue is •taken up with water and extracted with AcOEt, the 15 organic phase is washed with saturated NaCl solution and dried over Na SO, and the solvent is evaporated off under vacuum. The product obtained is dissolved in 100 Sml of acetone, a solution of 3.59 g of p-toluenesulfonic acid monohydrate in 10 ml of acetone is added rapidly and the mixture is concentrated under vacuum.

The residue is taken up with an ether/DCM mixture and the precipitate formed is wrung to give 9.65 g of the expected product.

B) 4-(3,3-Dimethylcarbazoyl)-4-phenylpiperidine ptoluenesulfonate A mixture of 9.5 g of the compound obtained in the previous step and 0.9 g of 10% palladium-oncharcoal in 100 ml of 95° EtOH is hydrogenated at and at atmospheric pressure. The catalyst is filtered off on Celite® and the filtrate is concentrated under vacuum. The residue is taken up with 100 ml of acetone and the crystalline product formed is wrung and washed with ether to give 7 g of the expected product.

M.p. 210-212'C.

135 Preparation 2.20 4-[(Ethylaminocarbonyloxy)methyl]-4-phenylpiperidine hydrochloride A) 4-Methoxycarbonyl-4-phenylpiperidine p-toluenesulfonate 1 g of p-toluenesulfonic acid monohydrate is added to a solution of 10 g of 4-carboxy-4-phenylpiperidine p-toluenesulfonate in 300 ml of MeOH and the reaction mixture is refluxed for 3 days. It is concentrated under vacuum, the residue is taken up with acetone, and ether is added until precipitation occurs.

9.34 g of the expected product are obtained after wringing of the precipitate formed.

B) 4 -Hydroxymethyl-4-phenylpiperidine 15 A suspension of 1.16 g of lithium aluminum hydride in 50 ml of THF is cooled to -20°C, 4 g of the compound obtained in the previous step are added and the mixture is stirred overnight while the temperature is allowed to rise to RT. It is hydrolyzed by the 20 addition of 1.2 ml of water and then 2.5 ml of 10% NaOH solution and 2.5 ml of water. The mixture is diluted with ether, the mineral salts are filtered off and the filtrate is evaporated under vacuum to give 1.8 g of the expected product.

C) l-tert-Butoxycarbonyl-4-(hydroxymethyl)-4-phenylpiperidine 26.05 g of di-tert-butyl dicarbonate are added to a solution of 22.8 g of the compound obtained in the previous step in 250 ml of 1,2-dimethoxyethane and the reaction mixture is refluxed for 2 hours. It is concentrated under vacuum, the residue is taken up with DCM, the organic phase is washed with a buffer solution of pH 2 and with saturated NaCl solution and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 17.86 g of the expected product after crystalliza- 136 tion from ether. M.p. 134'C.

D) l-tert-Butoxycarbonyl-4-[(ethylaminocarbonyloxy)methyl]- 4 -phenylpiperidine A mixture of 2.91 g of the compound obtained in the previous step, 2.4 g of ethyl isocyanate and 2 drops of triethylamine in 30 ml of toluene is stirred overnight at RT. The reaction mixture is then heated at 100°C for 24 hours and concentrated under vacuum.

The residue is taken up with ether, the organic phase is washed with a buffer solution of pH 2 and with saturated NaCI solution and dried over MgSO, and the solvent is evaporated off under vacuum to give 3.85 g of the expected product in the form of an oil.

E) 4-[(Ethylaminocarbonyloxy)methyl]-4-phenylpiperidine 15 hydrochloride ml of concentrated HC1 are added to a solution of 3.85 g of the compound obtained in the previous step in 50 ml of MeOH and the mixture is heated at for 2 hours. It is concentrated under vacuum, the 20 residue is taken up with acetone and the solvent is evaporated off under vacuum to give 2.6 g of the expected product after crystallization from an AcOEt/ ether mixture. M.p. 240-242°C.

*Preparation 2.21 4-(Acetoxymethyl)-4-phenylpiperidine 0.785 g of acetyl chloride is added at RT to a solution of 2.91 g of the compound obtained in step C of Preparation 2.20 and 1.31 g of triethylamine in ml of DCM and the mixture is stirred for 30 minutes at RT. It is concentrated under vacuum, the residue is taken up with water and extracted with AcOEt, the organic phase is washed twice with water and with saturated NaCI solution and dried over MgSO, and the solvent is evaporated off under vacuum. The oily residue is taken up with 20 ml of trifluoroacetic acid 137 and the mixture is stirred for 10 minutes at RT. It is concentrated under vacuum, the residue is taken up with water, the aqueous phase is rendered alkaline to pH 11 by the addition of concentrated NaOH solution and extracted with DCM, the organic phase is washed 5 times with water and with saturated NaCl solution and dried over MgSO, and the solvent is evaporated off under vacuum to give 1.6 g of the expected product.

Preparation 2.22 4-Benzyl-4-[(ethoxycarbonyl-N-methylamino)methyl]piperidine benzenesulfonate A) l-Benzyl-4-carbamoylpiperidine 85.5 g of benzyl bromide are added dropwise at RT to a mixture of 58.2 g of isonipecotamide and 69 g 15 of K 2 CO, in 275 ml of DMF and the reaction mixture is stirred for 2 hours at 50°C. It is concentrated under vacuum, the residue is taken up with water and extracted with DCM, the organic phase is washed with water and dried over NaSO 4 and the solvent is evaporated off 20 under vacuum to give 62 g of the expected product after crystallization from 300 ml of water and drying under vacuum.

B) l-Benzyl-4-cyanopiperidine A mixture of 62 g of the compound obtained in the previous step and 200 ml of POC1, is refluxed for 2 hours. It is concentrated under vacuum, the residue is taken up with water, rendered alkaline to pH 13 by the addition of concentrated NaOH solution and extracted with DCM, the organic phase is washed with water and dried over NaSO, and the solvent is evaporated off under vacuum. The oil obtained is distilled under reduced pressure to give 52 g of the expected product.

B.p. 120°C under 10 Pa.

C) 1,4-Dibenzyl-4-cyanopiperidine 200 ml of a 1.5 M solution of lithium diiso- 138 propylamide in cyclohexane, diluted in 100 ml of THF, are cooled to -50°C, a solution of 52 g of the compound obtained in the previous step in 100 ml of THF is added dropwise and the mixture is stirred for 30 minutes at -50'c. A solution of 51.3 g of benzyl bromide in 100 ml of THF is then added dropwise at a temperature between -30 0 C and -25"C and the mixture is stirred while the temperature is allowed to rise to RT. It is concentrated under vacuum, the residue is taken up with water and extracted with ether, the organic phase is washed with water and dried over Na 2

SO

4 and the solvent is evaporated off under vacuum to give 64 g of the expected product after crystallization from pentane.

D) 4-(Aminomethyl)-1,4-dibenzylpiperidine 15 A solution of 14.5 g of the compound obtained in the previous step in 50 ml of THF is added dropwise at RT to a suspension of 1.95 g of lithium aluminum hydride in 50 ml of THF and the mixture is then refluxed for 6 hours. After cooling to RT, 2 ml of 20 water, 2 ml of 4 N NaOH solution and 6 ml of water are added. The mineral salts are filtered off on Clite*, the filtrate is decanted, the organic phase is dried over Na 2 SO, and the solvent is evaporated off under vacuum to give 14.7 g of the expected product.

E) 1,4-Dibenzyl-4-[(formylamino)methyl]piperidine 42 ml of acetic anhydride are added dropwise at RT to a solution of 14.7 g of the compound obtained in the previous step in 126 ml of formic acid and the mixture is stirred for 3 hours at RT. It is concentrated under vacuum, the residue is taken up with water, rendered alkaline to pH 13 by the addition of concentrated NaOH solution and extracted with AcOEt, the organic phase is washed with water and dried over Na 2 SO, and the solvent is evaporated off under vacuum to give 14.5 g of the expected product.

139 F) 1,4-Dibenzyl-4-[(methylamino)methyl]piperidine A solution of 14.5 g of the compound obtained in the previous step in 100 ml of THF is added dropwise at 40'C to a suspension of 5 g of lithium aluminum hydride in 100 ml of THF and the mixture is then refluxed for 4 hours. After cooling to RT, 5 ml of water, 5 ml of 4 N NaOH solution and 15 ml of water are added. The mineral salts are filtered off on C4lite®, the filtrate is decanted, the organic phase is dried over NaSO 4 and the solvent is evaporated off under vacuum to give 12.8 g of the expected product.

G) 1,4-Dibenzyl-4-[(ethoxycarbonyl-N-methylamino)methyl]piperidine 1.26 g of ethyl chloroformate are added drop- 5 wise at RT to a solution of 3 g of the compound obtained in the previous step and 1.18 g of triethylamine ~i*n 50 ml of 1,2-dichloroethane and the mixture is stirred for 1 hour at RT. It is concentrated under vacuum, the residue is taken up with water and extrac- 20 ted with ether, the organic phase is dried over NaSO, and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH S9* mixture (100/3; v/v) as the eluent to give 1.6 g of the expected product.

H) 4-Benzyl-4-[(ethoxycarbonyl-N-methylamino)methyl]piperidine benzenesulfonate A mixture of 1.6 g of the compound obtained in the previous step, 0.66 g of benzenesulfonic acid, 0.2 g of 10% palladium-on-charcoal and 30 ml of MeOH is hydrogenated at 27°C and at atmospheric pressure. The catalyst is filtered off on Celite® and the filtrate is concentrated under vacuum to give 1.44 g of the expected product.

140 Preparation 2.23 4-Benzyl-4-[(methanesulfonyl-N-methylamino)methyl]piperidine benzenesulfbnate A) 1,4-Dibenzyl-4-[(methanesulfonyl-N-methylamino)methyl]piperidine 1.26 g of methanesulfonyl chloride are added dropwise at RT to a solution of 3.2 g of the compound obtained in step F of Preparation 2.22 and 1.26 g of triethylamine in 50 ml of 1,2-dichloroethane and the mixture is stirred for 1 hour at RT. It is concentrated under vacuum, the residue is taken up with water and extracted with AcOEt, the organic phase is dried over Na 2

SO

4 and the solvent is evaporated off under vacuum to give 3.8 g of the expected product.

15 B) 4 -Benzyl- 4 -[(methanesulfonyl-N-methylamino)methyl]piperidine benzenesulfonate A mixture of 3.8 g of the compound obtained in 'the previous step, 1.58 g of benzenesulfonic acid, 0.8 g of 10% palladium-on-charcoal and 30 ml of MeOH is 20 hydrogenated at RT and at atmospheric pressure. The catalyst is filtered off on C4lite* and the filtrate is concentrated under vacuum to give 4.6 g of the expected product after crystallization from a DCM/ether mixture.

Preparation 2.24 4-Benzyl-4-[(N',N'-dimethyl-N-methylureido)methyl]piperidine hydrochloride A) 1,4-Dibenzyl-4-[(N',N'-dimethyl-N-methylureido)methyl]piperidine 1.12 g of N,N-dimethylcarbamoyl chloride are added dropwise at RT to a solution of 3.2 g of the compound obtained in step F of Preparation 2.22 and 1.2 g of triethylamine in 40 ml of 1,2-dichloroethane and the mixture is refluxed for 4 hours. It is concentrated under vacuum, the residue is taken up with water and extracted with ether, the organic phase is dried over 141 NaSO 4 and the solvent is evaporated off under vacuum to give 3.6 g of the expected product.

B) 4-Benzyl-4-[(N',N'-dimethyl-N-methylureido)methyl]piperidine hydrochloride A mixture of 3.6 g of the compound obtained in the previous step, 3.1 g of ammonium formate and 0.8 g of 5% palladium-on-charcoal in 50 ml of MeOH is stirred for 1 hour 30 minutes. The catalyst is filtered off and the solvent is evaporated off under vacuum. The residue is dissolved in DCM, a saturated solution of hydrochloric acid in ether is added until the pH is 1, and the solvents are evaporated off under vacuum to give 3.2 g of the expected product.

*e Preparation 2.25 15 4 -Carbamoyl-4-(morpholin-4-yl)piperidine A) l-Benzyl-4-cyano-4-(morpholin-4-yl)piperidine 2.5 ml of morpholine and then 5.1 g of NaSO0 are added to a mixture of 5 g of l-benzylpiperid-4-one and 1.9 g of potassium cyanide in 50 ml of an EtOH/ 20 water mixture (50/50; v/v) and the mixture is heated at C for 2 hours. A further 2.5 ml of morpholine are added and the reaction mixture is stirred overnight at RT. Water is added and the crystalline product formed is wrung to give 5.5 g of of the expected product.

B) 1-Benzyl-4-carbamoyl-4-(morpholin-4-yl)piperidine A mixture of 14 g of the compound obtained in the previous step and 50 ml of 95% sulfuric acid is heated at 100°C for 2 hours. After cooling to RT, the reaction mixture is poured onto 100 g of ice, brought to pH 7 by the addition of concentrated NH4OH solution and extracted with DCM, the organic phase is washed with water and dried over NaSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (100/5; v/v to 100/10; v/v) as the eluent to give 3.4 g of the 142 expected product after crystallization from iso ether.

C) 4-Carbamoyl-4-(morpholin-4-yl)piperidine 3.1 g of ammonium formate and 0.8 g of palladium-on-charcoal are added to a solution of 3.4 g of the compound obtained in the previous step in 50 ml of MeOH and the mixture is stirred for 2 hours at RT.

The catalyst is filtered off on Celite* and the filtrate is evaporated under vacuum to give 2.2 g of the expected product after crystallization from propan-2ol.

143 EXAMPLE 1 3-Benzyl-5-[2-(4-benzylpiperid-l-yl)ethyl]-5- (3,4-dichlorophenyl)tetrahydro-2H-l,3-oxazin-2-one hydrochloride monohydrate A) 3-Benzyl-5-(3,4-dichlorophenyl)-5-[2-(tetrahydropyran-2-yloxy)ethyl]tetrahydro-2H-l,3-oxazin-2-one A solution of 4 g of the compound obtained in Preparation 1.1 in 60 ml of THF is cooled to 1.37 g of potassium tert-butylate are added and a solution of 1.92 g of benzyl bromide in 15 ml of THF is then added dropwise. The reaction mixture is stirred while the temperature is allowed to rise to RT, and concen- Strated under vacuum. The residue is extracted with AcOEt, the organic phase is washed three times with 15 water and twice with saturated NaCl solution and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 4.2 g of the expected product, which is used as such.

B) 3-Benzyl-5-(3,4-dichlorophenyl)-5-(2-hydroxyethyl)- 20 tetrahydro-2H-l,3-oxazin-2-one 0.25 hydrate A saturated solution of gaseous HC1 in ether is added to a solution of 4.2 g of the compound obtained in the previous step in 40 ml of MeOH until the pH is 1, and the reaction mixture is stirred for 48 hours at RT. It is concentrated under vacuum, the residue is taken up with a saturated solution of gaseous HC1 in MeOH and the solvent is evaporated off under vacuum.

The residue is taken up with ether and the precipitate formed is wrung to give 3.44 g of the expected product. M.p. 143°C.

C) 3-Benzyl-5-(3,4-dichlorophenyl)-5-[2-(methanesulfonyloxy)ethyl]tetrahydro-2H-1,3-oxazin-2-one A solution of 1.4 g of the compound obtained in the previous step and 0.45 g of triethylamine in 50 ml of DCM is cooled to +5°C and a solution of 0.46 g of 144 methanesulfonyl chloride in 5 ml of DCM is added dropwise. After the addition, the reaction mixture is concentrated under vacuum, the residue is taken up with water and extracted with AcOEt, the organic phase is washed twice with water and with saturated NaCl solution and dried over MgSO, and the solvent is evaporated off under vacuum to give 1.7 g of the expected product.

Proton NMR spectrum at 200 MHz in DMSO-d, 6: 2.03 ppm t 2H 2.98 ppm s 3H 3.78 ppm AB system 2H 3.83 ppm t 2H 4.1 to 4.8 ppm u 4H to 7.6 ppm u 8H D) 3-Benzyl-5-[2-(4-benzylpiperid-l-yl)ethyl]-5-(3,4dichlorophenyl)tetrahydro-2H-l,3-oxazin-2-one hydrochloride monohydrate A mixture of 1.6 g of 4-benzylpiperidine, 1.7 g of the compound obtained in the previous step and 0.6 g of potassium iodide in 10 ml of DMF is heated at for 2 hours 30 minutes. After cooling to RT, the reac- Stion mixture is poured into water and extracted with AcOEt, the organic phase is washed twice with water and with saturated NaCl solution and dried over MgSO, and 25 the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using DCM as the eluent. The product obtained is taken up with a saturated solution of gaseous HC1 in ether and the precipitate formed is wrung to give 0.9 g of the expected product. M.p. 122°C.

EXAMPLE 2 3-Benzyl-5-(3,4-dichlorophenyl)-5-[2-(4hydroxy-4-phenylpiperid-l-yl)ethyl]tetrahydro-2H-1,3oxazin-2-one hydrochloride This compound is prepared by the procedure 145 described in step D of EXAMPLE 1 from 1.32 g of 4hydroxy-4-phenylpiperidine, 1.55 g of the compound obtained in step C of EXAMPLE 1 and 0.56 g of potassium iodide in 10 ml of DMF. The residue is chromatographed on silica H using DCM and then a DCM/MeOH mixture (96/4; v/v) as the eluent. The product obtained is dissolved in DCM and acidified to pH 1 by the addition of a saturated solution of gaseous HC1 in ether and the solvents are evaporated off under vacuum to give 0.72 g of the expected compound after crystallization from ether. M.p. 172 0

C.

EXAMPLE 3 i* 5-[2-(4-Acetamido-4-phenylpiperid-l-yl)ethyl]- S• 3-benzyl-5-(3,4-dichlorophenyl)tetrahydro-2H-l,3- S* 15 oxazin-2-one hydrochloride 1.5 hydrate This compound is prepared by the procedure described in step D of EXAMPLE 1 from 2.77 g of 4acetamido-4-phenylpiperidine, 1.7 g of the compound obtained in step C of EXAMPLE 1 and 0.61 g of potassium iodide in 10 ml of DMF. The residue is chromatographed on silica H using DCM and then a DCM/MeOH mixture (97/3; v/v) as the eluent. The residue is taken up with a saturated solution of gaseous HC1 in ether and the solvent is evaporated off under vacuum to give 0.6 g of the expected product after crystallization Sfrom AcOEt. M.p. 168°C.

EXAMPLE 4 3-[3,5-Bis(trifluoromethyl)benzyl]-5-(3,4dichlorophenyl)-5-[2-(4-phenylpiperid-l-yl)ethyl]tetrahydro-2H-1,3-oxazin-2-one hydrochloride hemihydrate A) 3-[3,5-Bis(trifluoromethyl)benzyl]-5-(3,4-dichlorophenyl)-5-[2-(tetrahydropyran-2-yloxy)ethyl]tetrahydro-2H-1,3-oxazin-2-one A solution of 3.7 g of the compound obtained in 146 Preparation 1.1 in 60 ml of THF is cooled to 1.27 g of potassium tert-butylate are added and a solution of 2.72 g of 3 ,5-bis(trifluoromethyl)benzyl chloride in ml of THF is then added dropwise. The reaction mixture is stirred while the temperature is allowed to rise to RT, and concentrated under vacuum. The residue is taken up with water and extracted with AcOEt, the organic phase is washed with water and with saturated NaCl solution and dried over MgSO, and the solvent is evaporated off under vacuum to give 5.9 g of the expected product, which is used as such.

B) 3 -[3,5-Bis(trifluoromethyl)benzyl]-5-(3,4-dichlorophenyl)-5-(2-hydroxyethyl)tetrahydro-2H-l,3-oxazin- 2-one 15 A saturated solution of gaseous HC1 in ether is added to a solution of 5.9 g of the compound obtained in the previous step in 50 ml of MeOH until the pH is 1, and the reaction mixture is stirred for 15 minutes at RT. It is concentrated under vacuum, the residue is 20 taken up twice with a saturated solution of gaseous HC1 in MeOH and the solvent is evaporated off under vacuum.

The residue is taken up with hexane and the precipitate formed is wrung to give 3.9 g of the expected product.

Proton NMR spectrum at 200 MHz in DMSO-d, S6: 1.9 ppm t 2H 2.9 to 3.6 ppm u 4H 3.8 ppm AB system 2H 4.35 ppm s 2H 5.45 ppm bs 1H 7.1 to 7.8 ppm u 3H to 8.5 ppm u 3H 8.9 ppm bs 1H 147 C) 3 3 ,5-Bis(trifluoromethyl)benzyl]-5-(3,4-dichlorophenyl)-5-[2-(methanesulfonyloxy)ethyl]tetrahydro- 2H-1,3-oxazin-2-one A solution of 3 g of the compound obtained in the previous step and 0.7 g of triethylamine in 50 ml of DCM is cooled to a solution of 0.66 g of methanesulfonyl chloride in 6 ml of DCM is added dropwise and the reaction mixture is stirred while the temperature is allowed to rise to RT. It is concentrated under vacuum, the residue is taken up with water and extracted with AcOEt, the organic phase is washed with water, with 2 N HC1 solution, with water, with NaHCO, solution, with water and with saturated NaCl e solution and dried over MgSO, and the solvent is eva- *ee 15 porated off under vacuum to give 3.4 g of the expected product.

D) 3 -[3,5-Bis(trifluoromethyl)benzyl]-5-(3,4-dichlorophenyl)-5-[2-(4-phenylpiperid-l-yl)ethyl]tetrahydro- 2H-1,3-oxazin-2-one hydrochloride hemihydrate 20 A mixture of 0.32 g of 4-phenylpiperidine, 1 g of the compound obtained in the previous step and 0.28 g of potassium iodide in 5 ml of DMF is heated at C for 3 hours. After cooling, the reaction mixture is poured into water and extracted with AcOEt, the 25 organic phase is washed with water and with saturated NaCl solution and dried over MgSO, and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using DCM and then a DCM/MeOH mixture (98/2; v/v) as the eluent. The product obtained is taken up with a saturated solution of gaseous HC1 in ether and the precipitate formed is wrung to give 0.22 g of the expected product. M.p. 174'C.

148 EXAMPLE 5-[2-(4-Benzylpiperid-l-yl)ethyl]-3-[3,5-bis- (trifluoromethyl)benzyl]-5-(3,4-dichlorophenyl)tetrahydro-2H-l,3-oxazin-2-one hydrochloride 1.5 hydrate This compound is prepared by the procedure described in step D of EXAMPLE 4 from 0.3 g of 4benzylpiperidine, 0.8 g of the compound obtained in step C of EXAMPLE 4, 0.24 g of potassium iodide and ml of DMF. The residue is chromatographed on silica H using DCM and then a DCM/MeOH mixture (96/4; v/v) as the eluent. The product obtained is taken up with a saturated solution of gaseous HC1 in ether and the precipitate formed is wrung to give 0.13 g of Sthe expected product. M.p. 124°C.

15 EXAMPLE 6 5-[2-(4-Anilinopiperid-l-yl)ethyl]-3-[3,5- S* bis(trifluoromethyl)benzyl]-5-(3,4-dichlorophenyl)tetrahydro-2H-l,3-oxazin-2-one dihydrochloride monohydrate 20 A mixture of 0.3 g of 4-anilinopiperidine, 0.8 g of the compound obtained in step C of EXAMPLE 4 and 0.69 g of potassium carbonate in 5 ml of acetonitrile is heated at 50-60°C for 5 hours. The reaction mixture is poured into water and extracted with AcOEt, 25 the organic phase is washed twice with water and with saturated NaCl solution and dried over MgSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using DCM and then a DCM/ MeOH mixture (96/4; v/v) as the eluent. The product obtained is taken up with a saturated solution of gaseous HC1 in ether and the precipitate formed is wrung to give 0.12 g of the expected product.

M.p. 158°C.

149 EXAMPLE 7 5-(3,4-Dichlorophenyl)-5-[2-[4-phenyl-1-azoniabicyclo[2.2.2]oct-l-yl]ethyl]-3-[3,5-bis(trifluoromethyl)benzyl]tetrahydro-2H-1,3-oxazin-2-one chloride 2.5 hydrate A mixture of 0.53 g of 4-phenyl-l-azabicyclo- [2.2.2]octane and 1.4 g of the compound obtained in step C of EXAMPLE 4 in 5 ml of DMF is heated at for 5 hours. After cooling to RT, the reaction mixture is poured into water and extracted with DCM, the organic phase is washed twice with 2 N HC1 solution and three times with saturated NaCl solution and dried over MgSO, and the solvent is evaporated off under vacuum.

9* The residue is chromatographed on silica using DCM and S" 15 then a DCM/MeOH mixture (92/8; v/v) as the eluent. The product obtained is taken up with ether and the precipitate formed is wrung to give 0.21 g of the expected product. M.p. 138*C.

9* EXAMPLE 8 20 3-Benzyl-5-[3-(4-benzylpiperid-l-yl)propyl]-5- (3,4-dichlorophenyl)tetrahydro-2H-1,3-oxazin-2-one hydrochloride A) 3-Benzyl-5-(3,4-dichlorophenyl)-5-[3-(tetrahydro- Spyran-2-yloxy)propyl]tetrahydro-2H-l,3-oxazin-2-one 25 A solution of 12.5 g of the compound obtained in Preparation 1.2 in 150 ml of THF is cooled to 4.13 g of potassium tert-butylate are added and a solution of 5.78 g of benzyl bromide in 30 ml of THF is then added dropwise. The mixture is stirred for 1 hour at RT and concentrated under vacuum. The residue is taken up with water and extracted with AcOEt, the organic phase is washed twice with water and with saturated NaCl solution and dried over MgSO 4 and the solvent is evaporated off under vacuum to give the expected product, which is used as such.

150 B) 3-Benzyl-5-(3,4-dichlorophenyl)-5-(3-hydroxypropyl)tetrahydro-2H-l,3-oxazin-2-one The compound obtained in the previous step is taken up with a saturated solution of gaseous HC1 in MeOH and the reaction mixture is stirred for 2 hours at RT. It is concentrated under vacuum, the residue is taken up twice with a saturated solution of gaseous HC1 in MeOH and the solvent is evaporated off under vacuum.

The residue is chromatographed on silica using DCM and then a DCM/MeOH mixture (96/4; v/v) as the eluent to give 10.6 g of the expected product, which is used as such.

C) 3-Benzyl-5-(3,4-dichlorophenyl)-5-[3-(methanesulfonyloxy)propyl]tetrahydro-2H-1,3-oxazin-2-one 15 A solution of 10 g of the compound obtained in the previous step and 3.07 g of triethylamine in 350 ml of DCM is cooled to +5°C and a solution of 3.19 g of methanesulfonyl chloride in 35 ml of DCM is added dropwise. After the addition, the reaction mixture is concentrated under vacuum, the residue is taken up with water and extracted with AcOEt, the organic phase is washed twice with water and with saturated NaCl solution and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 11 g of the expected product, 25 which is used as such.

D) 3-Benzyl-5-[3-(4-benzylpiperid-l-yl)propyl]-5-(3,4dichlorophenyl)tetrahydro-2H-1,3-oxazin-2-one hydrochloride A mixture of 1.86 g of 4-benzylpiperidine, 2 g of the compound obtained in the previous step and 0.7 g of potassium iodide in 10 ml of DMF is heated at for 2 hours. After cooling to RT, the reaction mixture is poured into water and extracted with AcOEt, the organic phase is washed twice with water and with saturated NaCl solution and dried over MgSO 4 and the 151 solvent is evaporated off under vacuum. The residue is chromatographed on silica H using DCM and then a DCM/ MeOH mixture (98/2; v/v) as the eluent. The product obtained is taken up with a saturated solution of gaseous HCl in ether and the solvent is evaporated off under vacuum to give 1.4 g of the expected product after crystallization from AcOEt. M.p. 219°C.

EXAMPLE 9 3-Benzyl-5-(3,4-dichlorophenyl)-5-[3-(4- 10 hydroxy-4-phenylpiperid-l-yl)propyl]tetrahydro-2H-1,3oxazin-2-one hydrochloride hemihydrate •This compound is prepared by the procedure described in step D of EXAMPLE 8 from 1.6 g of 4-hydroxy- S• 4-phenylpiperidine, 2 g of the compound obtained in step C of EXAMPLE 8 and 0.75 g of potassium iodide in 10 ml of DMF. The residue is chromatographed on silica H using DCM and then a DCM/MeOH mixture (96/4; v/v) as the eluent. The product obtained is taken up with a saturated solution of gaseous HC1 in ether and the precipitate formed is wrung to give 1.34 g of the expected product. M.p. 125°C.

EXAMPLE 5-[3-(4-Acetamido-4-phenylpiperid-l-yl)propyl]- 3-benzyl-5-(3,4-dichlorophenyl)tetrahydro-2H-l,3oxazin-2-one hydrochloride 1.5 hydrate 2.02 g of 4-acetamido-4-phenylpiperidine hydrochloride are dissolved in 5 ml of water, rendered alkaline to pH 13 by the addition of concentrated NaOH and extracted with DCM, the organic phase is dried over MgSO 4 and the solvent is evaporated off under vacuum.

The residue is taken up with 10 ml of DMF, 1.5 g of the compound obtained in step C of EXAMPLE 8 and 0.53 g of potassium iodide are added and the reaction mixture is heated at 50°C for 2 hours 30 minutes. It is poured into water and extracted with AcOEt, the organic phase 152 is washed three times with water and with saturated NaCl solution and dried over MgSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica using DCM and then a DCM/MeOH mixture (96/4; v/v) as the eluent. The product obtained is taken up with a saturated solution of gaseous HC1 in ether and the solvent is evaporated off under vacuum to give 1.34 g of the expected product after crystallization from AcOEt. M.p. 145°C.

10 EXAMPLE 11 3-Benzyl-5-(3,4-dichlorophenyl)-5-[3-[4-(Nphenylacetamido)piperid-l-yl]propyl]tetrahydro-2H-l,3- ~oxazin-2-one hydrochloride A mixture of 1.76 g of 4-anilinopiperidine, 2 g of the compound obtained in step C of EXAMPLE 8 and 0.75 g of potassium iodide in 10 ml of DMF is heated at for 1 hour 30 minutes. The reaction mixture is poured into water and extracted with AcOEt, the organic Sphase is washed three times with water and with saturated NaCl solution and dried over MgSO, and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using DCM and then a DCM/MeOH mixture (96/4; v/v) as the eluent. The product obtained is taken up with 10 ml of acetic anhydride and the reaction mixture is stirred for 48 hours at RT. It is concentrated under vacuum, the residue is extracted with AcOEt, the organic phase is washed twice with aqueous ammonia solution, twice with water and with saturated NaCl solution and dried over MgSO, and the solvent is evaporated off under vacuum. The product obtained is taken up with a saturated solution of gaseous HC1 in ether and the solvent is evaporated off under vacuum to give 1.4 g of the expected product after crystallization from AcOEt. M.p. 195°C.

153 EXAMPLE 12 3-Benzyl-5-(3,4-dichlorophenyl)-5-[3-[4-phenyll-azoniabicyclo[2.2.2]oct-l-yl]propyl]tetrahydro-2H- 1,3-oxazin-2-one chloride hemihydrate A mixture of 1.2 g of 4-phenyl-l-azabicyclo- [2.2.2]octane and 2 g of the compound obtained in step C of EXAMPLE 8 in 10 ml of DMF is heated at 50'C for 3 hours. After cooling to RT, the reaction mixture is poured into water and extracted with DCM, the organic 10 phase is washed with water, with saturated NaCl solu- S: tion, twice with 2 N HC1 solution, twice with water and with saturated NaCl solution and dried over MgSO, and the solvent is evaporated off under vacuum. The residue is taken up with AcOEt and the precipitate formed is wrung to give 1.56 g of the expected product.

M.p. 235°C.

EXAMPLE 13 3-Benzyl-5-(3,4-dichlorophenyl)-5-[3-(4-benzylpyridinio-l)propyl]tetrahydro-2H-l,3-oxazin-2-one chloride dihydrate A mixture of 1.07 g of 4-benzylpyridine and 2 g of the compound obtained in step C of EXAMPLE 8 in ml of DMF is heated at 90°C for 6 hours. After cooling to RT, the reaction mixture is poured into water and extracted with DCM, the organic phase is washed with water and three times with saturated NaCl solution and dried over MgSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica using DCM and then a DCM/MeOH mixture (90/10; v/v) as the eluent. The product obtained is dissolved in the minimum amount of acetone, ether is added until precipitation occurs, and the precipitate formed is wrung to give 0.8 g of the expected product. M.p. 84*C.

154 EXAMPLE 14 4-Benzyl-6-(3,4-dichlorophenyl)-6-[2-(4hydroxy-4-phenylpiperid-l-yl)ethyl]morpholin-3-one hydrochloride hemihydrate A) 4-Benzyl-6-(3,4-dichlorophenyl)-6-(2-hydroxyethyl)morpholin-3-one 0.51 g of potassium tert-butylate is added at RT to a solution of 1.7 g of the compound obtained in Preparation 1.3 in 30 ml of THF, 0.77 g of benzyl 10 bromide is then added slowly and the reaction mixture is heated for 2 hours at 50°C. It is concentrated under vacuum, the residue is taken up with water and extracted with ether, the organic phase is washed with water and dried over NaSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (100/0.5; v/v) as the eluent. The product obtained (1 g) is dissolved in ml of MeOH and acidified to pH 1 by the addition of a saturated solution of gaseous HC1 in ether and the solvents are evaporated off under vacuum. The residue is extracted with ether, the organic phase is washed with water and dried over Na 2 SO, and the solvent is evaporated off under vacuum to give 0.65 g of the expected product.

Proton NMR spectrum at 200 MHz in DMSO-d, 6: 1.9 ppm mt 2H 2.7 to 3.3 ppm mt 2H 3.65 ppm AB system 2H ppm AB system 2H 4.3 ppm t 1H 4.45 ppm AB system 2H to 7.6 u 11H This compound can also be obtained using the method described below.

155 4-Benzyl-6-(3,4-dichlorophenyl)-6-(2-hydroxyethyl)morpholin-3-one A mixture of 6 g of the compound obtained in Preparation 1.4 and 1.87 g of potassium tert-butylate in 100 ml of THF is stirred for two hours at RT, 2.85 g of benzyl bromide are then added slowly and the reaction mixture is refluxed for 3 hours. It is concentrated under vacuum, the residue is taken up with a buffer solution of pH 2 and extracted with ether, the 10 organic phase is washed with water and dried over NaSO, and the solvent is evaporated off under vacuum.

The product obtained is dissolved in MeOH, 1.3 g of lithium hydroxide monohydrate are added and the reaction mixture is stirred for 30 minutes at RT. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and dried over NaSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (100/1; v/v) as the eluent to give 4.6 g of the expected product.

B) 4-Benzyl-6-(3,4-dichlorophenyl)-6-[2-(methanesulfonyloxy)ethyl]morpholin-3-one A solution of 0.65 g of the compound obtained in the previous step and 0.34 g of triethylamine in ml of DCM is cooled to 0°C and 0.25 g of methanesulfonyl chloride is added. After the addition, the reaction mixture is concentrated under vacuum, the residue is extracted with AcOEt, the organic phase is washed with water and dried over NaSO, and the solvent is evaporated off under vacuum to give 0.71 g of the expected product, which is used as such.

C) 4-Benzyl-6-(3,4-dichlorophenyl)-6-[2-(4-hydroxy-4phenylpiperid-l-yl)ethyl]morpholin-3-one hydrochloride hemihydrate A mixture of 0.7 g of the compound obtained in 156 the previous step, 0.378 g of 4-hydroxy-4-phenylpiperidine and 0.8 g of KCO, in 5 ml of acetonitrile is refluxed for 4 hours. After cooling to RT, the reaction mixture is poured into water and extracted with AcOEt, the organic phase is washed with water and dried over Na 2 SO, and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (100/3; v/v) as the eluent.

The product obtained is dissolved in the minimum amount 10 of DCM and acidified to pH 1 by the addition of a saturated solution of gaseous HC1 in ether and the precipitate formed is wrung to give 0.43 g of the expected product. M.p. 160-162'C.

S. EXAMPLE 6-(3,4-Dichlorophenyl)-6-[2-(4-hydroxy-4phenylpiperid-l-yl)ethyl]-4-(4-phenylbenzyl)morpholin- 3-one hydrochloride monohydrate A) 6-[2-(Benzoyloxy)ethyl]-6-(3,4-dichlorophenyl)- 4 4 S:phenylbenzyl)morpholin-3-one A mixture of 1.3 g of the compound obtained in Preparation 1.4 and 0.36 g of potassium tert-butylate in 30 ml of THF is stirred for 30 minutes at RT, 0.79 g of 4-(bromomethyl)biphenyl is added and the reaction mixture is refluxed for 2 hours. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and dried over Na 2 SO, and the solvent is evaporated off under vacuum.

The residue is chromatographed on silica H using DCM and then a DCM/MeOH mixture (100/0.5; v/v) as the eluent to give 1.1 g of the expected product.

Proton NMR spectrum at 200 MHz in DMSO-d, 6: 2.3 ppm mt 2H 3.55 ppm AB system 2H 3.9 to 4.4 ppm u 4H 4.5 ppm s 2H 157 to 7.8 ppm u 17H B) 6-(3,4-Dichlorophenyl)-6-(2-hydroxyethyl)- 4 4 phenylbenzyl)morpholin-3-one A mixture of 1.1 g of the compound obtained in the previous step and 2 ml of concentrated NaOH solution in 20 ml of MeOH is stirred for 30 minutes at RT.

The reaction mixture is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and dried over Na 2

SO

4 and the solvent is evaporated off under vacuum to give 0.84 g of the expected product.

Proton NMR spectrum at 200 MHz in DMSO-d, 6: 1.85 ppm mt 2H S2.7 to 3.3 ppm mt 2H 3.5 ppm AB system 2H 3.95 ppm AB system 2H 4.35 ppm t 1H 4.4 ppm AB system 2H to 7.6 ppm u 12H C) 6-(3,4-Dichlorophenyl)-6-[2-(methanesulfonyloxy)ethyl]-4-(4-phenylbenzyl)morpholin-3-one 0.252 g of methanesulfonyl chloride is added at RT to a solution of 0.84 g of the compound obtained in the previous step and 0.223 g of triethylamine in 30 ml of DCM and the mixture is stirred for 30 minutes at RT.

It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and dried over NaSO, and the solvent is evaporated off under vacuum to give 0.89 g of the expected product, which is used as such.

D) 6-(3,4-Dichlorophenyl)-6-[2-(4-hydroxy-4-phenylpiperid-l-yl)ethyl]-4-(4-phenylbenzyl)morpholin-3one hydrochloride monohydrate A mixture of 0.89 g of the compound obtained in the previous step, 0.875 g of 4-hydroxy-4-phenylpiperi- 158 dine p-toluenesulfonate and 0.483 g of KCO, in 2 ml of DMF is heated at 80-100°C for 1 hour. After cooling to RT, the reaction mixture is poured into water and extracted with ether, the organic phase is washed with water and dried over Na 2 SO, and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a gradient of a DCM/MeOH mixture (from 100/2; v/v to 100/5; v/v) as the eluent. The product obtained is dissolved in the minimum amount of 10 DCM and acidified to pH 1 by the addition of a saturated solution of gaseous HC1 in ether and the precipitate formed is wrung to give 0.45 g of the expected product. M.p. 143-150°C.

EXAMPLE 16 6-(3,4-Dichlorophenyl)-6-[2-[4-phenyl-l-azoniabicyclo[2.2.2]oct-l-yl]ethyl]-4-[3,5-bis(trifluoromethyl)benzyl]morpholin-3-one chloride monohydrate A) 6-[2-(Benzoyloxy)ethyl]-6-(3,4-dichlorophenyl)-4- [3,5-bis(trifluoromethyl)benzyl]morpholin-3-one A mixture of 2.1 g of the compound obtained in Preparation 1.4 and 0.616 g of potassium tert-butylate in 50 ml of THF is stirred for 30 minutes at RT, 1.44 g of 3,5-bis(trifluoromethyl)benzyl chloride are added and the reaction mixture is refluxed for 1 hour. It is concentrated under vacuum, the residue is taken up with a buffer solution of pH 4 and extracted with ether, the organic phase is washed with water and dried over Na 2

SO

4 and the solvent is evaporated off under vacuum.

The residue is chromatographed on silica H using a DCM/ MeOH mixture (100/0.5; v/v) as the eluent to give 1.8 g of the expected product.

Proton NMR spectrum at 200 MHz in DMSO-d, 6: 2.4 ppm mt 2H 4.05 ppm AB system 2H 4.15 to 4.6 ppm u 4H 159 4.75 ppm AB system 2H 7.3 to 8.2 ppm u 11H B) 6-(3,4-Dichlorophenyl)-6-(2-hydroxyethyl)-4-[3,5bis(trifluoromethyl)benzyl]morpholin-3-one A mixture of 1.8 g of the compound obtained in the previous step and 4 ml of concentrated NaOH solution in 30 ml of MeOH is stirred for 30 minutes at 0°C and stirring is then continued for 1 hour at RT. The reaction mixture is concentrated under vacuum, the 10 residue is extracted with ether, the organic phase is washed with water and dried over NaSO 4 and the solvent is evaporated off under vacuum to give 1.1 g of the expected product.

Proton NMR spectrum at 200 MHz in DMSO-d, 6: 2.0 ppm t 2H 2.9 to 3.45 ppm mt 2H 3.9 ppm AB system 2H 4.2 ppm AB system 2H 4.45 ppm t 1H 4.7 ppm AB system 2H 7.1 to 8.2 ppm u 6H C) 6-(3,4-Dichlorophenyl)-6-[2-(methanesulfonyloxy)- •ethyl]-4-[3,5-bis(trifluoromethyl)benzyl]morpholin- 3-one 0.25 g of methanesulfonyl chloride is added at RT to a solution of 1.1 g of the compound obtained in the previous step and 0.22 g of triethylamine in 30 ml of DCM and the reaction mixture is stirred for 1 hour.

It is concentrated under vacuum, the residue is extracted with AcOEt, the organic phase is washed with water and dried over NaSO 4 and the solvent is evaporated off under vacuum to give 1.2 g of the expected product, which is used as such.

160 D) 6-(3,4-Dichlorophenyl)-6-[2-[4-phenyl-l-azoniabicyclo[2.2.2]oct-1-yl]ethyl]-4-[3,5-bis(trifluoromethyl)benzyl]morpholin-3-one chloride monohydrate A mixture of 1.2 g of the compound obtained in the previous step and 0.45 g of 4-phenyl-l-azabicyclo- [2.2.2]octane in 4 ml of DMF is heated at 100 0 C for 1 hour. After cooling to RT, the reaction mixture is poured into water and extracted with DCM, the organic phase is washed with 2 N HC1 solution, with saturated 10 NaCl solution and with water and dried over NaSO 4 and the solvent is evaporated off under vacuum to give 0.9 g of the expected product after crystallization from a DCM/iso ether/pentane mixture. M.p. 160°C.

EXAMPLE 17 2-[2-(4-Acetamido-4-phenylpiperid-1-yl)ethyl]- 4-benzoyl-2-(3,4-dichlorophenyl)morpholine hydrochloride monohydrate A) 4-Benzoyl-2-(3,4-dichlorophenyl)-2-(2-hydroxyethyl)morpholine A solution of 3.6 g of the compound obtained in Preparation 1.5 and 2.9 g of triethylamine in 50 ml of 9W DCM is cooled to -60°C, a solution of 1.83 g of benzoyl chloride in 20 ml of DCM is added dropwise and the reaction mixture is stirred for 30 minutes. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and with NaOH solution and dried over Na 2 SO4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a gradient of a DCM/MeOH mixture (from 100/1; v/v to 100/5; v/v) as the eluent to give 1.2 g of the expected product.

Proton NMR spectrum at 200 MHz in DMSO-d, 6: 1.95 ppm mt 2H 2.8 to 4.8 ppm u 9H 6.8 to 7.9 ppm u 8H 161 B) 4-Benzoyl-2-(3,4-dichlorophenyl)-2-[2-(methanesulfonyloxy)ethyl]morpholine A solution of 1.2 g of the compound obtained in the previous step and 0.637 g of triethylamine in 50 ml of DCM is heated to 60°C, a solution of 0.414 g of methanesulfonyl chloride in 10 ml of DCM is added dropwise and the reaction mixture is stirred for 1 hour at It is concentrated under vacuum, the residue is extracted with an AcOEt/ether mixture (50/50; the 10 organic phase is washed with water and with saturated NaHCO 3 solution and dried over NaSO 4 and the solvent is evaporated off under vacuum to give 1 g of the expected product, which is used as such.

C) 2-[2-(4-Acetamido-4-phenylpiperid-l-yl)ethyl]-4benzoyl-2-(3,4-dichlorophenyl)morpholine hydrochloride monohydrate A mixture of 1 g of the compound obtained in the previous step, 1 g of 4-acetamido-4-phenylpiperidine p-toluenesulfonate and 1 g of KCO, in 10 ml of acetonitrile and 5 ml of DMF is refluxed for 4 hours.

The reaction mixture is concentrated under vacuum, the residue is extracted with AcOEt, the organic phase is washed with water and dried over Na 2 SO, and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (100/3; v/v) as the eluent. The product obtained is dissolved in the minimum amount of DCM and acidified to pH 1 by the addition of a saturated solution of gaseous HC1 in ether and the precipitate formed is wrung to give 0.4 g of the expected product. M.p. 184- 187°C.

162 EXAMPLE 18 2-(3,4-Dichlorophenyl)-4-[(3-isopropoxyphenyl)acetyl]-2-[2-[4-phenyl-l-azoniabicyclo[2.2.2]oct-1-yl]ethyl]morpholine chloride monohydrate A) 2-(3,4-Dichlorophenyl)-2-(2-hydroxyethyl)-4-[( 3 isopropoxyphenyl)acetyl]morpholine A solution of 1.2 g of the compound obtained in Preparation 1.5, 0.83 g of 3-isopropoxyphenylacetic acid and 0.86 g of triethylamine in 15 ml of DCM is 10 cooled to O'C, 2 g of BOP are added and the reaction mixture is stirred for 30 minutes. It is concentrated under vacuum, the residue is extracted with DCM, the .organic phase is washed with water, with a buffer solution of pH 2 and with water and dried over NaSO, and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a gradient of a DCM/MeOH mixture (from 100/0.5; v/v to 100/2; v/v) as the eluent to give 0.25 g of the expected product.

Proton NMR spectrum at 200 MHz in DMSO-d, 6: 1.2 ppm d 6H 1.8 ppm t 2H e 0 2.8 to 4.8 ppm u 11H 6.4 to 7.8 ppm u 7H B) 2-(3,4-Dichlorophenyl)-4-[(3-isopropoxyphenyl)acetyl]-2-[2-(methanesulfonyloxy)ethyl]morpholine 0.069 g of methanesulfonyl chloride is added at RT to a solution of 0.25 g of the compound obtained in the previous step and 0.061 g of triethylamine in 10 ml of DCM and the reaction mixture is stirred for minutes. It is concentrated under vacuum, the residue is extracted with AcOEt, the organic phase is washed with water and with saturated NaC1 solution and dried over Na2SO4 and the solvent is evaporated off under vacuum to give 0.285 g of the expected product, which is used as such.

163 C) 2-(3,4-Dichlorophenyl)-4-[(3-isopropoxyphenyl)acetyl]-2-[2-[4-phenyl-l-azoniabicyclo[2.2.2]oct-1yl]ethyl]morpholine chloride monohydrate A mixture of 0.28 g of the compound obtained in the previous step and 0.15 g of 4-phenyl-l-azabicyclo- [2.2.2]octane in 2 ml of DMF is heated at 100°C for 1 hour. The reaction mixture is concentrated under vacuum, the residue is extracted with DCM, the organic phase is washed with water, with 10% HCl solution and with saturated NaCl solution and dried over NaSO, and the solvent is evaporated off under vacuum to give 0.17 g of the expected product after crystallization from an acetone/ether mixture. M.p. 125-130°C.

SEXAMPLE 19 "15 2-[3-(4-Acetamido-4-phenylpiperid-l-yl)propyl]- 4-benzoyl-2-(3,4-dichlorophenyl)morpholine hydrochloride monohydrate A) 4-Benzoyl-2-(3,4-dichlorophenyl)-2-(3-hydroxypropyl)morpholine A solution of 2 g of the compound obtained in Preparation 1.6 and 0.83 g of triethylamine in 30 ml of DCM is cooled to -10"C, a solution of 0.97 g of benzoyl chloride in 10 ml of DCM is added dropwise and the reaction mixture is stirred for 30 minutes. It is concentrated under vacuum, the residue is extracted with AcOEt, the organic phase is washed with water and with 10% NaOH solution and dried over NaSO, and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (100/1; v/v) as the eluent to give 1.7 g of the expected product.

Proton NMR spectrum at 200 MHz in DMSO-d, 6: 1.9 to 2.2 ppm u 4H 3.1 to 4.6 ppm u 9H 7.0 to 7.9 ppm u 8H 164 B) 4-Benzoyl-2-(3,4-dichlorophenyl)-2-[3-(methanesulfonyloxy)propyl]morpholine A solution of 1.7 g of the compound obtained in the previous step and 0.52 g of triethylamine in 30 ml of DCM is cooled to 0°C, 0.6 g of methanesulfonyl chloride is added and the mixture is stirred for minutes. It is concentrated under vacuum, the residue is extracted with AcOEt, the organic phase is washed with water and dried over NaSO 4 and the solvent is evaporated off under vacuum to give 1.7 g of the expected product, which is used as such.

C) 2-[3-(4-Acetamido-4-phenylpiperid-l-yl)propyl]- 4 benzoyl-2-(3,4-dichlorophenyl)morpholine hydrochloride monohydrate 15 A mixture of 1.7 g of the compound obtained in o the previous step, 2.18 g of 4-acetamido-4-phenylpiperidine p-toluenesulfonate and 2.5 g of KCO, in ml of DMF and 10 ml of acetonitrile is refluxed for 3 hours. The reaction mixture is concentrated under vacuum, the residue is taken up with water and extracted with ether, the organic phase is washed with water and dried over NaSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (100/3; v/v) as the eluent.

25 The product obtained is dissolved in the minimum amount of DCM, a saturated solution of gaseous HC1 in ether is added until the pH is 1, and the precipitate formed is wrung to give 1 g of the expected product.

M.p. 170-173°C.

165 EXAMPLE 3-Benzyl-5-(3,4-dichlorophenyl)-5-[2-(4hydroxy-4-phenylpiperid-l-yl)ethyl]oxazolidin-2-one hydrochloride A) 5-[2-(Benzoyloxy)ethyl]-3-benzyl-5-(3,4-dichlorophenyl)oxazolidin-2-one 0.44 g of potassium tert-butylate is added at RT to a solution of 1.5 g of the compound obtained in Preparation 1.7 in 30 ml of THF and the mixture is stirred for 1 hour at RT. 0.667 g of benzyl bromide is then added dropwise and the reaction mixture is refluxed for 3 hours. It is concentrated under vacuum, the residue is extracted with ether, the organic phase S" is washed with a buffer solution of pH 2 and with water 15 and dried over NaSO, and the solvent is evaporated off o''e under vacuum. The residue is chromatographed on silica H using DCM and then a DCM/MeOH mixture (99.5/0.5; v/v) as the eluent to give 0.9 g of the expected product.

Proton NMR spectrum at 200 MHz in DMSO-d, 6: 2.6 ppm mt 2H 3.5 to 4.0 ppm AB system 2H 4.2 to 4.7 ppm u 4H 7.2 to 8.0 ppm u 13H B) 3-Benzyl-5-(3,4-dichlorophenyl)-5-(2-hydroxyethyl)oxazolidin-2-one A mixture of 0.9 g of the compound obtained in the previous step and 0.5 ml of concentrated NaOH solution in 30 ml of MeOH and 15 ml of DCM is stirred for minutes at RT. The reaction mixture is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and dried over NaSO, and the solvent is evaporated off under vacuum to give 0.7 g of the expected product, which is used as such.

166 C) 3-Benzyl-5-(3,4-dichlorophenyl)-5-[2-(methanesulfonyloxy)ethyl]oxazolidin-2-one 0.24 g of methanesulfonyl chloride is added at RT to a solution of 0.7 g of the compound obtained in the previous step and 0.21 g of triethylamine in 20 ml of DCM and the reaction mixture is stirred for 1 hour at RT. It is concentrated under vacuum, the residue is extracted with AcOEt, the organic phase is washed with water and dried over Na 2

SO

4 and the solvent is evaporated off under vacuum to give 0.76 g of the expected product, which is used as such.

D) 3-Benzyl-5-(3,4-dichlorophenyl)-5-[2-(4-hydroxy-4phenylpiperid-1-yl)ethyl]oxazolidin-2-one hydrochloride 15 A mixture of 0.76 g of 4-hydroxy-4-phenylpiperidine and 0.282 g of potassium iodide in 2 ml of DMF is heated at 50-60°C for 3 hours. After cooling to RT, the reaction mixture is poured into water and extracted with AcOEt, the organic phase is washed with water and dried over Na 2 SO, and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a gradient of a DCM/MeOH mixture (from 100/2; v/v to 100/3; v/v) as the eluent. The product obtained is dissolved in the minimum amount of 25 DCM and acidified to pH 1 by the addition of a saturated solution of gaseous HC1 in ether and the precipitate formed is wrung to give 0.36 g of the expected product. M.p. 223-225°C.

EXAMPLE 21 5-(3,4-Dichlorophenyl)-5-[2-[4-phenyl-l-azoniabicyclo[2.2.2]oct-l-yl]ethyl]-3-[3,5-bis(trifluoromethyl)benzyl]oxazolidin-2-one chloride dihydrate A) 5-(3,4-Dichlorophenyl)-5-(2-hydroxyethyl)-3-[3,5bis(trifluoromethyl)benzyl]oxazolidin-2-one A mixture of 1.4 g of the compound obtained in 167 Preparation 1.7 and 0.45 g of potassium tert-butylate in 30 ml of THF is stirred for 30 minutes at RT, 1.05 g of 3,5-bis(trifluoromethyl)benzyl chloride are added and the mixture is refluxed for 5 hours. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and dried over MgSO 4 and the solvent is evaporated off under vacuum. The product obtained is taken up with 30 ml of MeOH, 0.18 g of lithium hydroxide monohydrate and 1 ml of water are added and the mixture is stirred for 2 hours at RT. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and dried over MgSO, and the solvent is evaporated off under vacuum. The residue is chro- 15 matographed on silica H using a DCM/MeOH mixture (100/ 0.5; v/v) as the eluent to give 0.96 g of the expected product.

Proton NMR spectrum at 200 MHz in DMSO-d, 6: 2.2 ppm mt 2H 3.0 to 3.55 ppm mt 2H 3.57 to 3.9 ppm AB system 2H 4.35 to 4.7 ppm u 3H 7.2 to 8.1 ppm u 6H B) 5-(3,4-Dichlorophenyl)-5-[2-(methanesulfonyloxy)- 25 ethyl]-3-[3,5-bis(trifluoromethyl)benzyl]oxazolidin- 2-one 0.24 g of methanesulfonyl chloride is added at RT to a solution of 0.95 g of the compound obtained in the previous step and 0.21 g of triethylamine in 20 ml of DCM and the reaction mixture is stirred for 1 hour at RT. It is concentrated under vacuum, the residue is extracted with AcOEt, the organic phase is washed with water and dried over Na 2 SO, and the solvent is evaporated off under vacuum to give 1.1 g of the expected product, which is used as such.

I

168 C) 5-(3,4-Dichlorophenyl)-5-[2-[4-phenyl-1-azoniabicyclo[2.2.2]oct-l-yl]ethyl]-3-[3,5-bis(trifluoromethyl)benzyl]oxazolidin-2-one chloride dihydrate A mixture of 0.46 g of 4-phenyl-l-azabicyclo- [2.2.2]octane and 1.1 g of the compound obtained in the previous step in 2 ml of DMF is heated at 60'C for hours. After cooling to RT, the reaction mixture is poured into water and extracted with DCM, the organic phase is washed with water, with saturated NaCI solution, with 2 N HC1 solution and with water and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 0.6 g of the expected product after crystallization from a DCM/pentane mixture. M.p. 127-130 0 C (dec.).

EXAMPLE 22 5-[2-(4-Acetamido-4-phenylpiperid-l-yl)ethyl]l-benzyl-5-(3,4-dichlorophenyl)-4-methylpiperazine-2,3dione hydrochloride A) 1-Benzyl-5-(3,4-dichlorophenyl)-4-methyl-5-[2- 20 (tetrahydropyran-2-yloxy)ethyl]piperazine-2,3-dione 0.2 g of potassium tert-butylate is added to a solution of 0.6 g of the compound obtained in Preparation 1.8 in 10 ml of THF and the mixture is stirred for 1 hour at RT. 0.21 ml of benzyl bromide is then added 25 and the reaction mixture is heated at 40°C for 2 hours.

It is concentrated under vacuum, the residue is extracted with DCM, the organic phase is washed with water and dried over MgSO, and the solvent is evaporated off under vacuum to give 0.58 g of the expected product after crystallization from ether. M.p. 178°C.

B) l-Benzyl-5-(3,4-dichlorophenyl)-5-(2-hydroxyethyl)- 4-methylpiperazine-2,3-dione A mixture of 0.56 g of the compound obtained in the previous step, 10 ml of MeOH and 1 ml of a saturated solution of gaseous HC1 in ether is stirred for 1 169 hour. The reaction mixture is concentrated under vacuum, the residue is taken up with iso ether and the precipitate formed is wrung to give 0.45 g of the expected product. M.p. 198'C.

C) l-Benzyl-5-(3,4-dichlorophenyl)-5-[2-(methanesulfonyloxy)ethyl]-4-methylpiperazine-2,3-dione A solution of 0.44 g of the compound obtained in the previous step and 0.24 ml of triethylamine in ml of DCM is cooled to 0°C, 0.12 ml of methanesulfonyl chloride is added slowly and the reaction mixture is stirred for 15 minutes. It is washed twice with water, the organic phase is dried over MgSO 4 and the solvent is evaporated off under vacuum to give 0.5 g of the expected product, which is used as such.

D) 5-[ 2 -(4-Acetamido-4-phenylpiperid-l-yl)ethyl]-lbenzyl-5-(3,4-dichlorophenyl)-4-methylpiperazine- 2,3-dione hydrochloride A mixture of 0.5 g of the compound obtained in the previous step, 0.85 g of 4-acetamido-4-phenyleee 20 piperidine p-toluenesulfonate and 0.6 g of K 2 CO, in ml of DMF is heated at 80°C for 8 hours 30 minutes.

After cooling to RT, the reaction mixture is poured into water and the precipitate formed is wrung and washed with water. The precipitate is dissolved in 25 DCM, the organic phase is dried over MgSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using DCM and then a DCM/ MeOH mixture (93/7; v/v) as the eluent. The product obtained is dissolved in DCM, acidified to pH 1 by the addition of a saturated solution of gaseous HC1 in ether and concentrated under vacuum to give 0.105 g of the expected product after crystallization from ether.

M.p. 220'C (dec.).

170 EXAMPLE 23 3-[2-(4-Acetamido-4-phenylpiperid-l-yl)ethyl]l-benzoyl-3-(3,4-dichlorophenyl)-4-methylpiperazine dihydrochloride hemihydrate A) 1-Benzoyl-3-(3,4-dichlorophenyl)-4-methyl-3-[2- (tetrahydropyran-2-yloxy)ethyl]piperazine 0.45 ml of triethylamine is added to a solution of 1 g of the compound obtained in Preparation 1.9 in ml of DCM, the reaction mixture is then cooled to 0°C and 0.32 ml of benzoyl chloride is added dropwise.

The reaction mixture is then washed with water and with 1 N NaOH solution, the organic phase is dried over MgSO, and the solvent is evaporated off under vacuum.

The residue is chromatographed on silica using heptane and then a heptane/AcOEt mixture (50/50; v/v) as the eluent to give 0.95 g of the expected product, which is used as such.

B) l-Benzoyl-3-(3,4-dichlorophenyl)-3-(2-hydroxyethyl)- 4-methylpiperazine hydrochloride A saturated solution of gaseous HC1 in ether is added to a solution of 0.95 g of the compound obtained in the previous step in 15 ml of MeOH until the pH is and the mixture is left to stand for 2 hours at RT.

It is concentrated under vacuum, the residue is taken 25 up with ether and the precipitate formed is wrung and dried to give 0.8 g of the expected compound.

Proton NMR spectrum at 200 MHz in DMSO-d 6 6: 1.1 to 1.9 ppm u 2H 2.1 to 5.1 ppm u 12H 7.1 to 8.5 ppm u 8H C) 3 2 -(4-Acetamido-4-phenylpiperid-l-yl)ethyl]-1benzoyl-3-(3,4-dichlorophenyl)-4-methylpiperazine dihydrochloride hemihydrate 0.78 ml of triethylamine is added to a solution of 0.8 g of the compound obtained in the previous step 171 in 15 ml of DCM, the mixture is then cooled to and 0.25 ml of methanesulfonyl chloride is added dropwise. The reaction mixture is stirred for 10 minutes and then washed with water and with 10% NaCO3 solution and the organic phase is dried over MgSO 4 and filtered.

g of 4 -acetamido-4-phenylpiperidine p-toluenesulfonate are added to the filtrate and the mixture is concentrated under vacuum. The residue is taken up with 10 ml of DMF, 1.5 g of K 2 CO, are added and the reaction mixture is heated at 80°C for 2 hours minutes. After cooling, it is poured into iced water and extracted with AcOEt, the organic phase is washed with 1 N NaOH solution and with water and dried over MgSO, and the solvent is evaporated off under vacuum.

The residue is chromatographed on silica H using DCM and then a DCM/MeOH mixture (93/7; v/v) as the eluent.

The product obtained is taken up with a saturated solution of gaseous HC1 in ether and the precipitate formed is wrung to give 0.86 g of the expected product.

20 M.p. 210'C (dec.).

EXAMPLE 24 3-(3,4-Dichlorophenyl)-l-[(3-isopropoxyphenyl)acetyl]-4-methyl-3-[2-[4-phenyl-l-azoniabicyclo[2.2.2]oct-l-yl]ethyl]piperazine chloride hydrochloride A) 3-(3,4-Dichlorophenyl)-1-[(3-isopropoxyphenyl)acetyl]-4-methyl-3-[2-(tetrahydropyran-2-yloxy)ethyl]piperazine 0.57 ml of triethylamine and then 0.52 g of 3isopropoxyphenylacetic acid and 1.3 g of BOP are added to a solution of 1 g of the compound obtained in Preparation 1.9 in 15 ml of DCM. The mixture is stirred for 15 minutes at RT and concentrated under vacuum.

The residue is extracted with AcOEt, the organic phase is washed with water, with 1 N NaOH solution and with saturated NaCl solution and dried over MgSO 4 and the 172 solvent is evaporated off under vacuum. The residue is chromatographed on silica using heptane and then a heptane/AcOEt mixture (50/50; v/v) as the eluent to give 1.1 g of the expected product, which is used as such.

B) 3 4 -Dichlorophenyl)-3-(2-hydroxyethyl)-1-[(3isopropoxyphenyl)acetyl]-4-methylpiperazine hydrochloride A saturated solution of gaseous HC1 in ether is added to a solution of 1.1 g of the compound obtained in the previous step in 15 ml of MeOH until the pH is 1, and the reaction mixture is left to stand for 2 hours 30 minutes at RT. It is concentrated under vacuum, the residue is taken up with ether and the precipitate formed is wrung and dried to give 1.05 g of the expected product.

C) 3 -(3,4-Dichlorophenyl)-l-[(3-isopropoxyphenyl)acetyl]-4-methyl-3-[2-[4-phenyl-l-azoniabicyclo- [2.2.2]oct-l-yl]ethyl]piperazine chloride hydro- 4. 20 chloride 0.8 ml of triethylamine is added to a solution of 1.05 g of the compound obtained in the previous step in 15 ml of DCM, the mixture is then cooled to and 0.22 ml of methanesulfonyl chloride is added drop- 25 wise. After 5 minutes, the reaction mixture is washed with water and with 10% NaCO, solution and the organic phase is dried over MgSO, and filtered. 1 g of 4phenylquinuclidine is then added to the filtrate and the mixture is concentrated under vacuum. The residue is taken up with 1 ml of DMF and heated at 80°C for 1 hour. After cooling to RT, the reaction mixture is diluted with DCM and washed twice with 2 N HC1 solution and with saturated NaCl solution, the organic phase is dried over MgSO, and the solvent is evaporated off under vacuum. The residue is chromatographed on silica 173 H using DCM and then a DCM/MeOH mixture (90/10; v/v) as the eluent. The product obtained is taken up with iso ether and the precipitate formed is wrung to give 1.05 g of the expected product. M.p. 168°C (dec.).

EXAMPLE 6-[2-(4-Acetamido-4-phenylpiperid-l-yl)ethyl]- 4-benzyl-6-(3,4-difluorophenyl)morpholin-3-one hydrochloride hemihydrate A) 6-[2-(Benzoyloxy)ethyl]-4-benzyl-6-(3,4-difluorophenyl)morpholin-3-one A mixture of 1.1 g of the compound obtained in Preparation 1.10 and 0.38 g of potassium tert-butylate in 50 ml of THF is stirred for 30 minutes at RT, 0.51 g of benzyl bromide is added and the reaction mixture is refluxed for 2 hours. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and with a buffer solution of pH 2 and dried over NaSO, and the solvent is evaporated off 20 under vacuum. The residue is chromatographed on silica o H using DCM and then a DCM/MeOH mixture (100/2; v/v) as the eluent to give 0.6 g of the expected product.

Proton NMR spectrum at 200 MHz in DMSO-d 6 6: 2.3 ppm mt 2H 25 3.75 ppm AB system 2H 3.9 to 4.4 ppm u 4H ppm s 2H 7.0 to 8.0 ppm u 13H B) 4-Benzyl-6-(3,4-difluorophenyl)-6-(2-hydroxyethyl)morpholin-3-one A mixture of 0.6 g of the compound obtained in the previous step and 0.5 ml of concentrated NaOH solution in 10 ml of MeOH is stirred for 30 minutes at RT.

The reaction mixture is concentrated under vacuum, the residue is extracted with AcOEt, the organic phase is 174 washed with water and dried over Na 2

SO

4 and the solvent is evaporated off under vacuum to give 0.42 g of the expected product, which is used as such.

C) 4-Benzyl-6-(3,4-difluorophenyl)-6-[2-(methanesulfonyloxy)ethyl]morpholin-3-one 0.137 g of methanesulfonyl chloride is added at RT to a solution of 0.42 g of the compound obtained in the previous step and 0.146 g of triethylamine in 20 ml of DCM and the mixture is stirred for 30 minutes at RT.

It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and dried over NaSO 4 and the solvent is evaporated off under vacuum to give 0.49 g of the expected product, which is used as such.

D) 6-[2-(4-Acetamido-4-phenylpiperid-l-yl)ethyl]-4benzyl-6-(3,4-difluorophenyl)morpholin-3-one hydrochloride hemihydrate A mixture of 0.49 g of the compound obtained in the previous step, 0.94 g of 4-acetamido-4-phenylpipe- 20 ridine p-toluenesulfonate and 0.48 g of KCO, in 1 ml of DMF is heated at 80'C for 2 hours. After cooling to RT, the reaction mixture is poured into water and extracted with AcOEt, the organic phase is washed with water and dried over Na2SO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (100/3; v/v) as the eluent. The product obtained is dissolved in the minimum amount of DCM and acidified to pH 1 by the addition of a saturated solution of gaseous HCl in ether and the precipitate formed is wrung to give 0.5 g of the expected product. M.p. 273-275°C.

175 EXAMPLE 26 6-(3,4-Difluorophenyl)-6-[2-[4-phenyl-l-azoniabicyclo[2.2.2]oct-1-yl]ethyl]-4-[3,5-bis(trifluoromethyl)benzyl]morpholin-3-one chloride dihydrate A) 6-[2-(Benzoyloxy)ethyl]-6-(3,4-difluorophenyl)-4- [3,5-bis(trifluoromethyl)benzyl]morpholin-3-one A mixture of 1 g of the compound obtained in Preparation 1.10 and 0.32 g of potassium tert-butylate in 20 ml of THF is stirred for 1 hour at RT, 0.735 g of 3,5-bis(trifluoromethyl)benzyl chloride is then added and the reaction mixture is refluxed for 5 hours. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and dried over MgSO, and the solvent is evaporated off under vacuum to give the expected product, which is used as such.

B) 6 -(3,4-Difluorophenyl)-6-(2-hydroxyethyl)-4-[3,5bis(trifluoromethyl)benzyl]morpholin-3-one The product obtained in the previous step is dissolved in 15 ml of MeOH, 0.235 g of lithium hydroxide monohydrate is added and the reaction mixture is stirred for 30 minutes at RT. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and dried over MgSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (100/1; v/v) as the eluent to give 0.84 g of the expected product.

Proton NMR spectrum at 200 MHz in DMSO-d, 6: 1.95 ppm t 2H 2.95 to 3.5 ppm mt 2H 3.95 ppm AB system 2H 4.25 ppm AB system 2H ppm t 1H 4.7 ppm AB system 2H 176 to 8.2 ppm u 6H C) 6-(3,4-Difluorophenyl)-6-[2-(methanesulfonyloxy)ethyl]-4-[3,5-bis(trifluoromethyl)benzyl]morpholin- 3-one 0.22 g of methanesulfonyl chloride is added at RT to a solution of 0.8 g of the compound obtained in the previous step and 0.2 g of triethylamine in 15 ml of DCM and the reaction mixture is stirred for minutes at RT. It is concentrated under vacuum, the residue is extracted with AcOEt, the organic phase is washed with water and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 0.9 g of the expected product, which is used as such.

D) 6-(3,4-Difluorophenyl)-6-[2-[4-phenyl-1-azoniabicyclo[2.2.2]oct-l-yl]ethyl]-4-[3,5-bis(trifluoromethyl)benzyl]morpholin-3-one chloride dihydrate A mixture of 0.9 g of the compound obtained in the previous step and 0.38 g of 4-phenyl-l-azabicyclo- [2.2.2]octane in 2 ml of DMF is heated at 80'C for 4 20 hours. After cooling to RT, the reaction mixture is poured into water and extracted with AcOEt, the organic phase is washed with 2 N HC1 solution, with water, with saturated NaCl solution and with water and dried over NaSO 4 and the solvent is evaporated off under vacuum 25 to give 0.41 g of the expected product.

Proton NMR spectrum at 200 MHz in DMSO-d, 6: 2.0 to 2.6 ppm u 8H 2.7 to 3.7 ppm u 8H 3.9 ppm AB system 2H 4.1 to 5.1 ppm u 4H to 8.2 ppm u 11H 177 EXAMPLE 27 2-[2-(4-Acetamido-4-phenylpiperid-l-yl)ethyl]- 4-benzoyl-2-(3,4-difluorophenyl)morpholine hydrochloride monohydrate A) 4-Benzoyl-2-(3,4-difluorophenyl)-2-(2-hydroxyethyl)morpholine A solution of 0.9 g of benzoyl chloride in ml of DCM is added dropwise at RT to a solution of 0.77 g of the compound obtained in Preparation 1.11 and 0.7 g of triethylamine in 30 ml of DCM and the reaction mixture is stirred for 1 hour at RT. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and the solvent is evaporated off under vacuum. The residue is dissolved in MeOH, 0.53 g of lithium hydroxide monohydrate is added and the reaction mixture is stirred for minutes at RT. It is concentrated under vacuum, the residue is extracted with DCM, the organic phase is washed with water and dried over MgSO 4 and the solvent 20 is evaporated off under vacuum. The residue is chroma- S* tographed on silica H using a DCM/MeOH mixture (100/ v/v) as the eluent to give 0.5 g of the expected product.

Proton NMR spectrum at 200 MHz in DMSO-d, 6: 1.95 ppm mt 2H 2.8 to 4.9 ppm u 9H 6.8 to 7.8 ppm u 8H B) 4 -Benzoyl-2-(3,4-difluorophenyl)-2-[2-(methanesulfonyloxy)ethyl]morpholine A solution of 0.19 g of methanesulfonyl chloride in 5 ml of DCM is added dropwise at RT to a solution of 0.5 g of the compound obtained in the previous step and 0.17 g of triethylamine in 20 ml of DCM and the reaction mixture is stirred for 1 hour at RT. It is concentrated under vacuum, the residue is extracted 178 with AcOEt, the organic phase is washed with water and dried over Na 2

SO

4 and the solvent is evaporated off under vacuum to give 0.56 g of the expected product, which is used as such.

C) 2-[2-(4-Acetamido-4-phenylpiperid-l-yl)ethyl]-4benzoyl-2-(3,4-difluorophenyl)morpholine hydrochloride monohydrate A mixture of 0.56 g of the compound obtained in the previous step, 1 g of 4-acetamido-4-phenylpiperidine p-toluenesulfonate and 0.7 g of K 2 CO, in 2 ml of DMF is heated at 80°C for 3 hours. The reaction mixture is poured into water and extracted with AcOEt, the organic phase is washed with water and dried over NaSO, and the solvent is evaporated off under vacuum.

The residue is chromatographed on silica H using a DCM/ MeOH mixture (100/3; v/v) as the eluent. The product S: obtained is dissolved in the minimum amount of DCM, acidified to pH 1 by the addition of a saturated solution of gaseous HC1 in ether and concentrated under 20 vacuum to give 0.4 g of the expected product after crystallization from an EtOH/ether mixture. M.p. 179-182'C.

EXAMPLE 28 5-(3,4-Difluorophenyl)-5-[2-[4-phenyl-l-azoniabicyclo[2.2.2]oct-l-yl]ethyl]-3-[3,5-bis(trifluoromethyl)benzyl]oxazolidin-2-one chloride 1.5 hydrate A) 5-(3,4-Difluorophenyl)-5-(2-hydroxyethyl)-3-[3,5bis(trifluoromethyl)benzyl]oxazolidin-2-one Se A mixture of 1.5 g of the compound obtained in 30 Preparation 1.12 and 0.48 g of potassium tert-butylate in 15 ml of THF is stirred for 1 hour at RT, 1.1 g of chloride are added and the mixture is refluxed for 5 hours. It is concentrated under vacuum, the residue is taken up with a buffer solution of pH 2 and extracted with ether, the organic 179 phase is washed with water and dried over MgSO 4 and the solvent is evaporated off under vacuum. The product obtained is taken up with 20 ml of MeOH, 0.2 g of lithium hydroxide monohydrate is added and the mixture is stirred for 30 minutes at RT. It is concentrated under vacuum, the residue is extracted with DCM, the organic phase is washed with water and dried over MgSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (100/1; v/v) as the eluent to give 1.3 g of the expected product.

Proton NMR spectrum at 200 MHz in DMSO-d, 6: 2.2 ppm mt 2H to 3.55 ppm mt 2H 3.75 ppm AB system 2H 4.4 to 4.6 ppm u 3H S* 7.1 to 8.2 ppm u 6H B) 5-(3,4-Difluorophenyl)-5-[2-(methanesulfonyloxy)ethyl]-3-[3,5-bis(trifluoromethyl)benzyl]oxazolidin- 20 2-one 0.34 g of methanesulfonyl chloride is added at RT to a solution of 1.3 g of the compound obtained in the previous step and 0.3 g of triethylamine in 20 ml of DCM and the reaction mixture is stirred for minutes at RT. It is concentrated under vacuum, the residue is extracted with AcOEt, the organic phase is washed with water and dried over NaSO 4 and the solvent is evaporated off under vacuum to give 1.1 g of the expected product, which is used as such.

30 C) 5-(3,4-Difluorophenyl)-5-[2-[4-phenyl-l-azoniabicyclo[2.2.2]oct-l-yl]ethyl]-3-[3,5-bis(trifluoromethyl)benzyl]oxazolidin-2-one chloride 1.5 hydrate A mixture of 0.46 g of 4-phenyl-l-azabicyclo- [2.2.2]octane and 1.1 g of the compound obtained in the previous step in 2 ml of DMF is heated at 60"C for 180 hours. After cooling to RT, the reaction mixture is poured into water and extracted with DCM, the organic phase is washed with water, with saturated NaCl solution, with 2 N HC1 solution and with water and dried over MgSO, and the solvent is evaporated off under vacuum to give 0.6 g of the expected product.

Proton NMR spectrum at 200 MHz in DMSO-d 6 6: 2.1 ppm mt 6H 2.7 ppm t 2H 2.85 to 4.0 ppm u 4.6 ppm AB system 2H 7.1 to 8.2 ppm u 11H S.EXAMPLE 29 4-[2-(4-Acetamido-4-phenylpiperid-l-yl)ethyl]- 15 l-benzyl- 4 -(3,4-dichlorophenyl)-3-methylimidazolidin- 2-one hydrochloride A) l-Benzyl-4-(3,4-dichlorophenyl)-3-methyl-4-[2- (tetrahydropyran-2-yloxy)ethyl]imidazolidin-2-one 0.5 g of potassium tert-butylate is added to a solution of 1.45 g of the compound obtained in Preparation 1.13 in 20 ml of THF and the mixture is stirred for 1 hour at RT. 0.48 ml of benzyl bromide is then added and the reaction mixture is stirred for minutes at RT. It is concentrated under vacuum, the 25 residue is extracted with ether, the organic phase is washed with water and dried over MgSO, and the solvent is concentrated under vacuum. The residue is chromatographed on silica using heptane and then a heptane/ AcOEt mixture (40/60; v/v) as the eluent to give 1.5 g of the expected product, which is used as such.

B) l-Benzyl-4-(3,4-dichlorophenyl)-4-(2-hydroxyethyl)- 3-methylimidazolidin-2-one A saturated solution of gaseous HC1 in ether is added to a solution of 1.5 g of the compound obtained in the previous step in 20 ml of MeOH until the pH is 181 1, and the reaction mixture is stirred for 30 minutes at RT. It is concentrated under vacuum, the residue is taken up with MeOH and the solvent is evaporated off under vacuum to give 1.05 g of the expected product after crystallization from iso ether. M.p. 118'C.

C) l-Benzyl-4-(3,4-dichlorophenyl)-4-[2-(methanesulfonyloxy)ethyl]-3-methylimidazolidin-2-one A solution of 0.5 g of the compound obtained in the previous step and 0.34 ml of triethylamine in 10 ml of DCM is cooled to O°C, 0.17 ml of methanesulfonyl chloride is added and the reaction mixture is stirred for 15 minutes. It is washed with water, the organic phase is dried over MgSO 4 and the solvent is evaporated off under vacuum to give the expected product, which is used as such.

D) 4 2 -(4-Acetamido-4-phenylpiperid-l-yl)ethyl]-lbenzyl-4-(3,4-dichlorophenyl)-3-methylimidazolidin- 2-one hydrochloride A mixture of the compound obtained in the previous step, 0.8 g of 4-acetamido-4-phenylpiperidine p- S. toluenesulfonate and 0.8 g of K CO 3 in 5 ml of DMF is heated at 80°C for 3 hours. After cooling to RT, the reaction mixture is poured into water and extracted with AcOEt, the organic phase is washed with 1 N NaOH 25 solution and with saturated NaCl solution and dried over MgSO, and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using DCM and then a DCM/MeOH mixture (95/5; v/v) as the eluent. The product obtained is dissolved in the minimum amount of DCM, acidified to pH 1 by the addition of a saturated solution of gaseous HCl in ether and concentrated under vacuum to give 0.3 g of the expected product after crystallization from iso ether.

M.p. 206°C.

182 EXAMPLE 4-(3,4-Dichlorophenyl)-4-[2-[4-phenyl-l-azoniabicyclo[2.2.2]oct-l-yl]ethyl]-3-methyl-l-[3,5-bis(trifluoromethyl)benzyl]imidazolidin-2-one chloride A) 4-(3, 4 -Dichlorophenyl)-3-methyl-4-[2-(tetrahydropyran-2-yloxy)ethyl]-l-[3,5-bis(trifluoromethyl)benzyl]imidazolidin-2-one A mixture of 1.45 g of the compound obtained in Preparation 1.13 and 0.5 g of potassium tert-butylate in 20 ml of THF is stirred for 1 hour at RT, 1.04 g of chloride are then added and the reaction mixture is stirred for 2 hours at RT.

It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water 15 and with saturated NaCl solution and dried over MgSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica using heptane and then a heptane/AcOEt mixture (50/50; v/v) as the eluent to give 2.1 g of the expected product, which is used as such.

B) 4-(3,4-Dichlorophenyl)-4-(2-hydroxyethyl)-3-methyl- 1-[3,5-bis(trifluoromethyl)benzyl]imidazolidin-2one 1 ml of a saturated solution of gaseous HC1 in 25 ether is added to a solution of 2.1 g of the compound obtained in the previous step in 20 ml of MeOH and the mixture is stirred for 30 minutes at RT. It is concentrated under vacuum, the residue is taken up with MeOH and the solvent is evaporated off under vacuum to give 1.7 g of the expected product after crystallization from an iso ether/pentane mixture. M.p. 96°C.

C) 4-(3,4-Dichlorophenyl)-4-[2-(methanesulfonyloxy)ethyl]-3-methyl-l-[3,5-bis(trifluoromethyl)benzyl]imidazolidin-2-one A solution of 0.56 g of the compound obtained 183 in the previous step and 0.3 ml of triethylamine in ml of DCM is cooled to O'C, 0.15 ml of methanesulfonyl chloride is added and the reaction mixture is stirred for 15 minutes. It is washed with water, the organic phase is dried over MgSO, and the solvent is evaporated off under vacuum to give the expected product, which is used as such.

D) 4-(3,4-Dichlorophenyl)-4-[2-[4-phenyl-1-azoniabicyclo[2.2.2]oct-l-yl]ethyl]-3-methyl-l-[3,5-bis- (trifluoromethyl)benzyl]imidazolidin-2-one chloride A mixture of the compound obtained in the previous step and 0.35 g of 4-phenyl-l-azabicyclo[2.2.2]octane in 1 ml of DMF is heated at 80°C for 3 hours.

After cooling to RT, the reaction mixture is poured 15 into a mixture of 50 ml of water, 50 ml of DCM and 3 ml o.o of concentrated HCl and stirred for 5 minutes. The precipitate formed is wrung, washed with water, with DCM and then with ether and dried to give 0.3 g of the expected product. M.p. 290°C.

EXAMPLE 31 6-[3-(4-Acetamido-4-phenylpiperid-l-yl)propyl]- 4-benzyl-6-(3,4-dichlorophenyl)morpholin-3-one hydrochloride A) 4-Benzyl-6-[3-(benzoyloxy)propyl]-6-(3,4-dichloro- 25 phenyl)morpholin-3-one 0.369 g of potassium tert-butylate is added to a solution of 1.34 g of the compound obtained in Preparation 1.14 in 20 ml of THF and the mixture is stirred for 1 hour at RT. 0.564 g of benzyl bromide is then added and the reaction mixture is refluxed for 2 hours. It is concentrated under vacuum, the residue is taken up with a buffer solution of pH 2 and extracted with ether, the organic phase is washed with water and dried over MgSO 4 and the solvent is evaporated off under vacuum to give the expected product, which is 184 used as such.

B) 4 -Benzyl-6-(3,4-dichlorophenyl)-6-(3-hydroxypropyl)morpholin-3-one 0.277 g of lithium hydroxide monohydrate is added to a solution of the compound obtained in the previous step in 20 ml of MeOH and the mixture is stirred for 1 hour at RT. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 0.9 g of the expected product, which is used as such.

Proton NMR spectrum at 200 MHz in DMSO-d 6 6: 0.9 to 2.1 ppm u 4H 3.3 ppm q 2H 15 3.7 ppm AB system 2H 4.15 ppm AB system 2H 4.4 ppm t 1H ppm AB system 2H 7.1 to 7.8 ppm u 8H C) 4 -Benzyl- 6 -(3,4-dichlorophenyl)-6-[3-(methanesulfonyloxy)propyl]morpholin-3-one 0.316 g of methanesulfonyl chloride is added at RT to a solution of 0.9 g of the compound obtained in i the previous step and 0.288 g of triethylamine in 50 ml 25 of DCM and the mixture is stirred for 30 minutes at RT.

It is concentrated under vacuum, the residue is extracted with AcOEt, the organic phase is washed with water and dried over MgSO, and the solvent is evaporated off under vacuum to give 1.08 g of the expected product, which is used as such.

D) 6 3 4 -Acetamido-4-phenylpiperid-l-yl)propyl]-4benzyl-6-(3, 4 -dichlorophenyl)morpholin-3-one hydrochloride A mixture of 1.08 g of the compound obtained in the previous step, 1.4 g of 4-acetamido-4-phenylpiperi- 185 dine p-toluenesulfonate and 1.3 g of K 2 CO, in 5 ml of DMF is heated at 80°C for 3 hours. After cooling, the reaction mixture is poured into water and extracted with AcOEt, the organic phase is washed with water and dried over MgSO, and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (100/3; v/v) as the eluent.

The product obtained is dissolved in DCM, a saturated solution of gaseous HC1 in ether is added until the pH is 1, and the solvent is evaporated off under vacuum to give 0.6 g of the expected product after crystallization from an EtOH/ether mixture. M.p. 151-153'C.

EXAMPLE 32 4-(3,4-Dichlorophenyl)-3-methyl-4-[2-(4-phenyl- 15 piperid-1-yl)ethyl]-l-[3,5-bis(trifluoromethyl)benzyl]imidazolidin-2-one hydrochloride A mixture of 0.55 g of the compound obtained in step C of EXAMPLE 30, 0.47 g of 4-phenylpiperidine and 0.5 g of K2CO3 in 4 ml of DMF is heated at 80°C for hours. After cooling, the reaction mixture is poured into iced water and extracted with AcOEt, the organic phase is washed with 1 N NaOH solution and with water and dried over MgSO, and the solvent is evaporated off under vacuum. The residue is chromatographed on silica 25 H using DCM and then a DCM/MeOH mixture (98/2; v/v) as the eluent. The product obtained is dissolved in ether, a saturated solution of gaseous HC1 in ether is added until the pH is 1, and the precipitate formed is wrung to give 0.25 g of the expected product.

M.p. 208'C.

EXAMPLE 33 4-Benzyl-6-(3,4-dichlorophenyl)-6-[2-[4-phenyl- 4-(pyrrolidin-l-ylcarbonyl)piperid-l-yl]ethyl]morpho- 1in-3-one hydrochloride monohydrate A mixture of 0.98 g of the compound obtained in 186 step B of EXAMPLE 14, 0.645 g of 4-phenyl-4-(pyrrolidin-l-ylcarbonyl)piperidine and 0.69 g of KCO, in 3 ml of DMF is heated at 80°C for 2 hours. After cooling to RT, the reaction mixture is poured into water and extracted with an AcOEt/ether mixture, the organic phase is washed with water and dried over MgSO, and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (100/2; v/v) as the eluent. The product obtained is dissolved in the minimum amount of DCM and acidified to pH 1 by the addition of a saturated solution of gaseous HC in ether and the precipitate formed is wrung to give 0.42 g of the expected product. M.p. 155- 178 C.

15 EXAMPLE 34 6-[2-[4-(Acetyl-N-methylamino)-4-phenylpiperid- 1-yl]ethyl]-4-benzyl-6-(3,4-dichlorophenyl)morpholin- 3-one hydrochloride monohydrate A mixture of 1.1 g of the compound obtained in step B of EXAMPLE 14, 1.85 g of 4-(acetyl-N-methylamino)-4-phenylpiperidine p-toluenesulfonate and 1.3 g of K2CO, in 3 ml of DMF is heated at 80-100°C for 2 hours. After cooling to RT, the reaction mixture is poured into water and extracted with ether, the organic 25 phase is washed with water and dried over MgSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (from 100/1; v/v to 100/4; v/v) as the eluent. The product obtained is dissolved in DCM, a saturated solution of hydrochloric acid in ether is added until the pH is 1, and the precipitate formed is wrung to give 0.62 g of the expected product. M.p. 148-150'C.

187 EXAMPLE 4-Benzyl-6-[2-[4-(ethoxycarbonylamino)-4phenylpiperid-1-yl]ethyl]-6-(3,4-dichlorophenyl)morpholin-3-one hydrochloride monohydrate A mixture of 1.1 g of the compound obtained in step B of EXAMPLE 14, 1 g of 4-(ethoxycarbonylamino)-4phenylpiperidine trifluoroacetate and 0.7 g of K 2 CO, in 3 ml of DMF is heated at 80-100°C for 2 hours. After cooling to RT, the reaction mixture is poured into water and stirred for 30 minutes and the precipitate formed is wrung, washed with water and dried under vacuum at 60'C. The precipitate is chromatographed on silica H using a DCM/MeOH mixture (from 100/1; v/v to 100/4.5; v/v) as the eluent. The product 15 obtained is dissolved in DCM, a saturated solution of hydrochloric acid in ether is added until the pH is 1, and the precipitate formed is wrung to give 0.52 g of the expected product. M.p. 148-150'C.

EXAMPLE 36 4-Benzoyl-2-(3,4-difluorophenyl)-2-[2-[4- (N',N'-dimethylureido)-4-phenylpiperid-l-yl]ethyl]morpholine hydrochloride monohydrate, isomer A) 4 -Benzoyl-2-[2-(benzoyloxy)ethyl]-2-(3,4-difluorophenyl)morpholine, isomer 25 A solution of 8.9 g of the compound obtained in Preparation 1.17 isomer) and 3 g of triethylamine in 100 ml of DCM is cooled to 0°C, a solution of 3.59 g of benzoyl chloride in 20 ml of DCM is added dropwise and the reaction mixture is stirred for 30 minutes. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and dried over MgSO, and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (100/0.5; v/v) as the eluent to give 9.3 g of the expected product.

188 20 -4.7 (c 1; MeOH) B) 4-Benzoyl-2-(3,4-difluorophenyl)-2-(2-hydroxyethyl)morpholine, isomer 6.6 g of 30% aqueous NaOH solution are added dropwise at RT to a solution of 11.5 g of the compound obtained in the previous step in 60 ml of MeOH and the reaction mixture is stirred for 1 hour. It is concentrated under vacuum, the residue is taken up with water and extracted with ether, the organic phase is washed with water and dried over MgSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (from 00/1; v/v to 100/5; v/v) as the eluent to give 8.4 g of the expected product after crystallization from iso 15 ether. M.p. [a],Do -56.1° (c 1; MeOH) C) 4-Benzoyl-2-(3,4-difluorophenyl)-2-[2-(methanesulfonyloxy)ethyl]morpholine, isomer A solution of 0.36 g of methanesulfonyl chloride in 3 ml of DCM is added dropwise at RT to a solution of 1 g of the compound obtained in the previous step and 0.3 g of triethylamine in 25 ml of DCM and the reaction mixture is stirred for 30 minutes at RT. It is concentrated under vacuum, the residue is extracted 25 with ether, the organic phase is washed with water, with saturated NaHCO, solution and with water and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 1.05 g of the expected product.

-36.1° (c 1; MeOH) D) 4-Benzoyl-2-(3,4-difluorophenyl)-2-[2-[4-(N',N'-dimethylureido)-4-phenylpiperid-l-yl]ethyl]morpholine hydrochloride monohydrate, isomer 2 g of the compound obtained in Preparation 2.2 are dissolved in water, rendered alkaline by the addition of concentrated NaOH solution and extracted with 189 DCM, the organic phase is dried over MgSO 4 and the solvent is evaporated off under vacuum to give 1.08 g of the free base. The product obtained is taken up with 3 ml of DMF, 0.95 g of the compound obtained in the previous step is added and the reaction mixture is heated at 80°C for 3 hours. After cooling, it is poured into water and the precipitate formed is wrung and washed with water. The precipitate is dissolved in DCM, the organic phase is washed with NaOH solution and dried over MgSO and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (from 100/1; v/v to 100/7.5; v/v) as the eluent. The product obtained is dissolved in DCM, a saturated solution of 15 hydrochloric acid in ether is added until the pH is 1, and the solvents are evaporated off under vacuum to give 0.3 g of the expected product after crystallization from a DCM/pentane mixture. M.p. 168-172°C.

2 0 -22.2° (c 1; MeOH) EXAMPLE 37 4-Benzoyl-2-(3,4-difluorophenyl)-2-[2-[4-(N',N'dimethylureido)-4-phenylpiperid-l-yl]ethyl]morpholine hydrochloride hemihydrate, isomer A) 4-Benzoyl-2-[2-(benzoyloxy)ethyl]-2-(3,4-difluoro- 25 phenyl)morpholine, isomer A solution of 20 g of the compound obtained in Preparation 1.18 isomer) and 8 ml of triethylamine in 200 ml of DCM is cooled to 0°C, 6 ml of benzoyl chloride are added dropwise and the reaction mixture is stirred for 15 minutes. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water, with 1 N HCI solution and with 10% Na2CO, solution and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 22 g of the expected product in the form of an oil.

190 2 0 (c 1; MeOH) B) 4-Benzoyl-2-(3,4-difluorophenyl)-2-(2-hydroxyethyl)morpholine, isomer A mixture of 22 g of the compound obtained in the previous step, 9 ml of 30% aqueous NaOH solution and 200 ml of 95° EtOH is stirred for 1 hour at RT.

The reaction mixture is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed three times with water and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 13.7 g of the expected product after crystallization from an ether/iso ether mixture. M.p. [a] 2 0 +59.5° (c 1; MeOH) C) 4 -Benzoyl-2-(3,4-difluorophenyl)-2-[2-(methane- 1 5 sulfonyloxy)ethyl]morpholine, isomer A solution of 1 g of the compound obtained in the previous step and 0.45 ml of triethylamine in 10 ml of DCM is cooled to 0°C, 0.25 ml of methanesulfonyl chloride is added and the reaction mixture is stirred for 15 minutes. It is washed with water and with NaCO, solution, the organic phase is dried over MgSO 4 and the solvent is evaporated off under vacuum to give 1.2 g of the expected product in the form of an oil.

D) 4 -Benzoyl-2-(3,4-difluorophenyl)-2-[2-[4-(N',N'-di- 25 methylureido)-4-phenylpiperid-l-yl]ethyl]morpholine hydrochloride hemihydrate, isomer A mixture of 1.2 g of the compound obtained in the previous step, 3 g of the compound obtained in Preparation 2.2 and 2 g of K2CO3 in 10 ml of DMF is heated at 80 C for 3 hours. The reaction mixture is poured into iced water and extracted with AcOEt, the organic phase is washed with 1 N NaOH solution and with saturated NaCl solution and dried over MgSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using DCM and then a DCM/ 191 MeOH mixture (96/4; v/v) as the eluent. The product obtained is dissolved in DCM, a saturated solution of gaseous HC1 in ether is added until the pH is 1, and the solvent is evaporated off under vacuum to give 0.66 g of the expected product after crystallization from iso ether.

20 +22.2° (c 1; MeOH) EXAMPLE 38 5-(3,4-Dichlorophenyl)-5-[2-(4-phenylpiperidl-yl)ethyl]-3-[3,5-bis(trifluoromethyl)benzyl]oxazolidin-2-one hydrochloride A mixture of 1.5 g of the compound obtained in step B of EXAMPLE 21 and 1.03 g of 4-phenylpiperidine in 3 ml of DMF is heated at 80°C for 3 hours. After 15 cooling, the reaction mixture is poured into water and extracted with AcOEt, the organic phase is washed with water and dried over MgSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (100/1; v/v) as the eluent. The product obtained is dissolved in DCM, a saturated solution of gaseous HC1 in ether is added until the pH is 1, and the solvent is evaporated off under vacuum to give 0.7 g of the expected product after crystallization from a DCM/pentane mixture.

25 M.p. 112-114'C.

EXAMPLE 39 5-[2-(4-Acetamido-4-phenylpiperid-l-yl)ethyl]- 5-(3,4-dichlorophenyl)-3-[3,5-bis(trifluoromethyl)benzyl]oxazolidin-2-one hydrochloride monohydrate A mixture of 1.5 g of the compound obtained in step B of EXAMPLE 21, 1.5 g of 4-acetamido-4-phenylpiperidine p-toluenesulfonate and 1.6 g of K 2 CO, in 4 ml of DMF is heated at 80'C for 3 hours. After cooling, the reaction mixture is poured into water and extracted with an AcOEt/ether mixture (50/50; the 192 organic phase is washed with water and dried over MgSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/ MeOH mixture (100/3; v/v) as the eluent. The product obtained is dissolved in DCM, a saturated solution of gaseous HC1 in ether is added until the pH is 1, and the solvent is evaporated off under vacuum to give 0.66 g of the expected product after crystallization from a DCM/pentane mixture. M.p. 165-170'C.

EXAMPLE 5-(2-[4-Benzyl-l-azoniabicyclo[2.2.2]oct-lyl]ethyl]-5-(3,4-dichlorophenyl)-3-[3,5-bis(trifluoromethyl)benzyl]oxazolidin-2-one chloride monohydrate A mixture of 1.4 g of the compound obtained in 15 step B of EXAMPLE 21 and 0.6 g of 4-benzylquinuclidine in 3 ml of DMF is heated at 80'C for 2 hours. After cooling to RT, the reaction mixture is poured into water and extracted with AcOEt, the organic phase is washed with water, with 300 ml of 10% HC1 solution and with 300 ml of saturated NaCl solution and dried over MgSO, and the solvent is evaporated off under vacuum to give 1.35 g of the expected product after crystallization from AcOEt. M.p. 172-175'C.

*.EXAMPLE 41 25 4-Benzyl-6-(3,4-dichlorophenyl)-6-[2-[4-phenyl- 4 -(pyrrolidin-l-ylcarbonylamino)piperid-1-yl]ethyl]morpholin-3-one hydrochloride monohydrate A mixture of 1.1 g of the compound obtained in step B of EXAMPLE 14, 1.2 g of 4-phenyl-4-(pyrrolidinl-ylcarbonylamino)piperidine benzenesulfonate and 0.95 g of K2CO, in 3 ml of DMF is heated at 80-100"C for 3 hours. After cooling to RT, the reaction mixture is poured into water and the precipitate formed is wrung, washed with water and dried under vaccum.

The precipitate is chromatographed on silica H using a 193 DCM/MeOH mixture (from 100/2; v/v to 100/3; v/v) as the eluent. The product obtained is dissolved in the minimum amount of DCM and acidified to pH 1 by the addition of a saturated solution of gaseous HCl in ether and the precipitate formed is wrung to give 0.54 g of the expected product. M.p. 158-160"C.

EXAMPLE 42 4-Benzyl-6-(3,4-dichlorophenyl)-6-[2-[4-(2dimethylaminothiazol-4-yl)-4-phenylpiperid-l-yl]ethyl]morpholin-3-one dihydrochloride This compound is prepared by the procedure described in EXAMPLE 41 from 1.1 g of the compound obtained in step B of EXAMPLE 14, 1.3 g of 4-[2-(di- S: methylamino)thiazol-4-yl]-4-phenylpiperidine p-toluene- 1 5 sulfonate, 0.97 g of KCO, and 4 ml of DMF to give 0.76 g of the expected product. M.p. 155-160°C.

EXAMPLE 43 4-Benzoyl-2-(3,4-dichlorophenyl)-2-[2-[4- (morpholin-4-ylcarbonylamino)-4-phenylpiperid-l-yl]ethyl]morpholine hydrochloride monohydrate A) 4 -Benzoyl-2-[2-(benzoyloxy)ethyl]-2-(3,4-dichlorophenyl)morpholine 2.03 g of benzoyl chloride are added dropwise at RT to a solution of 5 g of the compound obtained in 25 Preparation 1.19 and 1.4 g of triethylamine in 100 ml of DCM and the reaction mixture is stirred for minutes at RT. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and dried over MgSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (100/1; v/v) as the eluent to give 4 g of the expected product.

194 B) 4 -Benzoyl-2-(3,4-dichlorophenyl)-2-(2-hydroxyethyl)morpholine A mixture of 4 g of the compound obtained in the previous step and 0.7 g of lithium hydroxide monohydrate in 50 ml of MeOH is stirred for 30 minutes at RT. The reaction mixture is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 3.1 g of the expected product.

This compound is also prepared by the procedure described in step A of EXAMPLE 17.

C) 4 -Benzoyl-2-(3,4-dichlorophenyl)-2-[2-(methanesulfonyloxy)ethyl]morpholine 1.07 g of methanesulfonyl chloride are added dropwise at RT to a solution of 3.1 g of the compound obtained in the previous step and 0.95 g of triethylamine in 50 ml of DCM and the reaction mixture is stirred for 1 hour at RT. It is concentrated under vacuum, the residue is extracted with an AcOEt/ether mixture (50/50; the organic phase is washed with water and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 3.7 g of the expected product, which is used as such.

This compound is also prepared by the procedure described in step B of EXAMPLE 17.

D) 4 -Benzoyl-2-(3,4-dichlorophenyl)-2-[2-[4-(morpholin- 4 -ylcarbonylamino)-4-phenylpiperid-l-yl]ethyl]morpholine hydrochloride monohydrate A mixture of 1.3 g of the compound obtained in the previous step, 1.5 g of 4-(morpholin-4-ylcarbonylamino)-4-phenylpiperidine p-toluenesulfonate and 1.2 g of KCO, in 3 ml of DMF is heated at 100"C for 3 hours.

After cooling to RT, the reaction mixture is poured into water and the precipitate formed is wrung 195 and dried under vacuum. The precipitate is chromatographed on silica H using a DCM/MeOH mixture (from 100/2; v/v to 100/3; v/v) as the eluent. The product obtained is dissolved in the minimum amount of DCM, acidified to pH 1 by the addition of a saturated solution of gaseous HC1 in ether and concentrated under vacuum to give 0.13 g of the expected product after crystallization from iso ether.

Proton NMR spectrum at 200 MHz in DMSO-d, 6: 1.8 to 4.0 ppm u 26H ppm s 1H 6.9 to 7.8 ppm u 13H 10.65 ppm s 1H EXAMPLE 44 15 4-Benzoyl-2-(3,4-dichlorophenyl)-2-[2-[4phenyl-4-(pyrrolidin-l-ylaminocarbonyl)piperid-l-yl]ethyl]morpholine dihydrochloride dihydrate A mixture of 1.3 g of the compound obtained in step C of EXAMPLE 43, 1.46 g of 4-phenyl-4-(pyrrolidinl-ylaminocarbonyl)piperidine benzenesulfonate and 1.17 g of KCO, in 5 ml of acetonitrile and 5 ml of DMF is heated at 100'C for 4 hours. After cooling to RT, the reaction mixture is poured into water and extracted with AcOEt, the organic phase is washed twice with 25 water and with saturated NaCl solution and dried over MgSO, and the solvent is evaporated off under vacuum.

The residue is chromatographed on silica H using DCM and then a DCM/MeOH mixture (97/3; v/v) as the eluent.

The product obtained is dissolved in acetone, a saturated solution of hydrochloric acid in ether is added until the pH is 1, and the precipitate formed is wrung to give 1.01 g of the expected product.

M.p. 170-174'C.

196 EXAMPLE 4-Benzoyl-2-(3,4-difluorophenyl)-2-[2-[4-(methoxycarbonylamino)-4-phenylpiperid-1-ylethyl morpholine hydrochloride monohydrate, isomer A mixture of 1.2 g of the compound obtained in step C of EXAMPLE 37, 1.3 g of 4-(methoxycarbonylamino)-4-phenylpiperidine p-toluenesulfonate and 1.2 g of KCO, in 3 ml of DMF is heated at 80-100 0 C for 2 hours. After cooling to RT, the reaction mixture is poured into water and the precipitate formed is wrung and dried under vaccum. The precipitate is chromatographed on silica H using a DCM/MeOH mixture (from 100/1.5; v/v to 100/3; v/v) as the eluent. The 0product obtained is dissolved in DCM, a saturated 15 solution of hydrochloric acid in ether is added until the pH is 1, and the precipitate formed is wrung to give 0.8 g of the expected product. M.p. 170*C.

[a]D2O +26.70 (c 1; MeOH) :EXAMPLE 46 4 -Benzoyl-2-(3,4-difluorophenyl)-2-[2-[4phenyl-4-(pyrrolidin-1-ylcarbonylamino)piperid-1-yl]ethyl]morpholine hydrochloride monohydrate, isomer This compound is prepared by the procedure 0 described in EXAMPLE 45 from 1.2 g of the compound 25 obtained in step C of EXAMPLE 37, 1.4 g of 4-phenyl-4- (pyrrolidin-1-ylcarbonylamino)piperidine benzenesulfonate, 1.2 g of K,CO, and 2 ml of DMF to give 0.3 g of the expected product. M.p. 163-168'C.

+22.80 (c 1; MeOH) EXAMPLE 47 4-Benzoyl-2-[2-[4-benzyl-4-(pyrrolidin--ylcarbonylamino)piperid-1-yl]ethyl]-2-(3,4-difluorophenyl)morpholine hydrochloride 1.5 hydrate, isomer This compound is prepared by the procedure described in EXAMPLE 45 from 1.2 g of the compound 197 obtained in step C of EXAMPLE 37, 1.5 g of 4-benzyl-4- (pyrrolidin-1-ylcarbonylamino)piperidine p-toluenesulf onate, 1.-2 g of K2 O3 and 3 ml of DMF to give 0.83 g of the expected product. H.p. 140 0

C.

[a] 2 0 +28.4' (c 1; MeOH) EXAMPLE 48 4-Benzoyl-2- (3 ,4-difluorophenyl [2- (dimethylamino )thiazol-4-yl J-4-phenylpiperid-1-y ethyl]morpholine dihydrochioride hemihydrate, isomer This compound is prepared by the procedure described in EXAMPLE 45 from 1.2 g of the compound obtained in step C of EXAMPLE 37, 1.55 g of 4-[2-(dimethylamino)thiazol-4-yl ]-4-phenylpiperidine p-toluenesulfonate, 1.2 g of K 2 00 3 and 3 ml of DMF to give 0.7 g of the expected product. M.p. =147*C +20.30 (c MeOH) :EXAMPLE 49 2-[2-[4-(2-Amino-l, 3,4-oxadiazol-5-yl)-4phenylpiperid-1-yl~ethyl ]-4-benzoyl-2-(3 ,4-difluoro- .~**phenyl)morpholine dihydrochioride, isomer This compound is prepared by the procedure described in EXAMPLE 45 from 1.2 g of the compound obtained in step C of EXAMPLE 37, 1.4 g of 4-(2-amino- 1,3 ,4-oxadiazol-5-yl)-4-phenylpiperidine p-toluenesulfonate, 1.2 g of K C and 3 ml of DMF to give 0.6 g of the expected product. M.p. =153*C.

(c MeOH) 198 EXAMPLE 5-(3,4-Difluorophenyl)-5-[2-[4-phenyl-1-azoniabicyclo[2.2.2]oct-1-yl]ethyl]-3-[3,5-bis(trifluoromethyl)benzyl]oxazolidin-2-one chloride monohydrate, isomer A) 5-[2-(Benzoyloxy)ethyl]-5-(3,4-difluorophenyl)-3- [3,5-bis(trifluoromethyl)benzyl]oxazolidin-2-one, isomer 1.2 g of potassium tert-butylate are added at RT to a solution of 3.5 g of the compound obtained in Preparation 1.20 isomer) in a mixture of 50 ml of THF and 10 ml of DMF and the mixture is stirred for minutes at RT. 2.7 g of chloride are then added and the reaction mixture is 15 heated at 60"C for 6 hours. It is poured into 200 ml of a buffer of pH 2 and extracted with ether, the organic phase is washed with water and dried over MgSO, and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using DCM as the eluent to give 3.6 g of the expected product.

B) 5-(3,4-Difluorophenyl)-5-(2-hydroxyethyl)-3-[3,5bis(trifluoromethyl)benzyl]oxazolidin-2-one, isomer A mixture of 3.6 g of the compound obtained in 25 the previous step and 0.32 g of lithium hydroxide monohydrate in 50 ml of MeOH and 5 ml of water is stirred for 2 hours at RT. The reaction mixture is concentrated under vacuum, the residue is taken up with water and extracted with ether, the organic phase is washed twice with water and dried over MgSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using DCM and then a DCM/ MeOH mixture (98/2; v/v) as the eluent to give 2.6 g of the expected product.

199 C) 5-(3,4-Difluorophenyl)-5-[2-(methanesulfonyloxy)ethyl]-3-[3,5-bis(trifluoromethyl)benzyl]oxazolidin- 2-one, isomer A solution of 2.6 g of the compound obtained in the previous step in 50 ml of DCM is cooled to 0'C, 1.14 ml of triethylamine and then 0.62 ml of methanesulfonyl chloride are added and the reaction mixture is stirred for 10 minutes. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed twice with water and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 3 g of the expected product, which is used as such.

D) 5-( 3 4 -Difluorophenyl)-5-[2-[4-phenyl-l-azonia- 1 5 bicyclo[2.2.2]oct-l-yl]ethyl]-3-[3,5-bis(trifluoromethyl)benzyl]oxazolidin-2-one chloride monohydrate, isomer *A mixture of 2 g of the compound obtained in the previous step and 1 g of 4-phenyl-l-azabicyclo- [2.2.2]octane in 1 ml of DMF is heated at 90°C for 2 hours. After cooling to RT, the reaction mixture is poured into 1 N HC1 solution and extracted with DCM, the organic phase is washed with 1 N HC1 solution and with saturated NaCl solution and dried over MgSO 4 and 25 the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using DCM and then a DCM/MeOH mixture (90/10; v/v) as the eluent to give 1.45 g of the expected product after crystallization from iso ether. M.p. 130"C (dec.).

[a],20 -36.2° (c 1; MeOH) 200 EXAMPLE 51 4-Benzoyl-2-(3,4-difluorophenyl)-2-[2-[4-(N',N'dimethylureido)-4-phenylpiperid-l-yl]ethyl]morpholine fumarate A) 4-Benzoyl-2-(3,4-difluorophenyl)-2-(formylmethyl)morpholine A solution of 0.32 ml of oxalyl chloride in 7.3 ml of DCM is cooled to -78 0 C under a nitrogen atmosphere and a solution of 0.51 ml of DMSO in 3.5 ml of DCM is added dropwise, followed by a solution of 1 g of the compound obtained in step A of EXAMPLE 27 in 7.5 ml of DCM and 0.7 ml of DMSO. The reaction mixture is stirred for 30 minutes at -60°C, 2 ml of triethylamine are then added and the reaction mixture is stirred 15 while the temperature is allowed to rise to RT. It is Re washed with 1 N HC1 solution, with saturated NaCO, solution and with water, the organic phase is dried over MgSO 4 and the solvent is evaporated off under vacuum to give 1.03 g of the expected product in the form of an oil.

I Proton NMR spectrum at 200 MHz in DMSO-d 6 6: 2.7 to 4.8 ppm u 8H to 8.0 ppm u 8H 9.6 ppm s 1H 25 B) 4-Benzoyl-2-(3,4-difluorophenyl)-2-[2-[4-(N',N'-dimethylureido)-4-phenylpiperid-l-yl]ethyl]morpholine fumarate A solution of 1 g of the compound obtained in the previous step in 10 ml of MeOH is added at RT to a solution of 0.72 g of 4-(N',N'-dimethylureido)-4-phenylpiperidine (free base) and 0.16 ml of acetic acid in ml of MeOH and the mixture is stirred for 5 minutes at RT. A solution of 0.19 g of sodium cyanoborohydride in ml of MeOH is then added all at once and the reaction mixture is stirred for 4 hours at RT. It is 201 neutralized by the addition of 10% Na 2 CO, solution and extracted with DCM, the organic phase is dried over MgSO 4 and the solvent is evaporated off under vacuum.

The residue is chromatographed on silica H using DCM and then a DCM/MeOH mixture (96/4; v/v) as the eluent.

The product obtained (1.1 g) is dissolved in 20 ml of acetone, 0.24 g of fumaric acid is added and the mixture is stirred for 1 hour at RT. The crystalline product formed is wrung and washed with acetone 10 and then with ether to give 1.35 g of the expected product. M.p. 204°C.

The compounds according to the invention which are collated in TABLE I below are prepared by the procedure described in EXAMPLE 34 from the compound obtained in step B of EXAMPLE 14 and the piperidines described in the Preparations.

TABLE I OCH C ~O Am-C~-H-C 1 N-CH (1) Ar Salt, solvate; Example Am Arl M.p. C or NMR; recrystallization solvent 52N- C HC, 2.5 H 2 0 HC C/ 138-140 I pentane/ether Me NCO-Me 53N- Cl HCI, 2 H 2 0 HC 128 (dec) N pentane/ether MeN 'CO-OEt 202 I Salt, solvate; Example Am Ar M.p. 0 C or NMR; recrystallization solvent

N

NH 2 0- C-NH-Et HCI, 2.5 H 2 0 138-140 pentane/ether 2 HCI. 2 H 2 0 198 (dec) pentane/iso ether HC1, 1 H 2 0 130- 134 pentane Rd, I H 2 0

NMR

pentane/ether RdI, 0.5 H 2 0

NMR

DCM/ether HCI, 1 H 2 0

NMR

DCM/ether S. CH, N-

H

2

C

N-C -0-Et Me 1 0

CH

2 a A 203 S. Proton NMR spectrum of EXAMPLE 57 at 200 MHz in DMSO-d 6 6:1.6 to 3.7 ppm :u :17 H 3.75 to 4.8 ppm :u :6 H to 7.6 ppm :u :13 H 10.2 to 11 ppm :2s :1 H Proton NMR spectrum of EXAMPLE 58 at 200 MHz in DMS0-d 6 6 0.8 to 4.9 ppm :u :30 H to 7.8 ppm :u :13 H 10.0 ppm :s :1 H Proton NMR spectrum of EXAMPLE 59 at 200 MHz in DMSO-d 6 6 1.1 to 3.8 ppm :u :24 H 3.9 to 4.75 ppm :u 4 H 6.9 to 7.7 ppm :u 13 H 9.7 ppm :s 1 H 204 EXAMPLE 63 6-[2-[4-Benzyl-l-azoniabicyclo[22.2.2]oct-1-yl]ethyl]-6-(3,4-difluorophenyl)-4-[3,5-bis(trifluoromethyl)benzyl]morpholin-3-one chloride dihydrate A mixture of 0.86 g of the compound obtained in step C of EXAMPLE 26 and 0.47 g of 4-benzyl-l-azabicyclo[2.2.2]octane (or 4-benzylquinuclidine) in 1 ml of DMF is heated at 90°C for 9 hours. After cooling to RT, the reaction mixture is poured into water and extracted with DCM, the organic phase is washed twice Swith 2 N HC1 solution and twice with saturated NaCI solution and dried over NaSO, and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using DCM and then a DCM/MeOH mixture (90/10; v/v) as the eluent to give 0.4 g of the expected product after crystallization from ether.

M.p. 135°C (dec.).

EXAMPLE 64 6-(3,4-Difluorophenyl)-4-[3,5-bis(trifluoromethyl)benzyl]-6-[2-[4-(piperid-l-yl)piperid-l-yl]ethyl]morpholin-3-one dihydrochloride hemihydrate A mixture of 0.86 g of the compound obtained in step C of EXAMPLE 26 and 0.7 g of 4-(piperid-l-yl)piperidine in 3 ml of DMF is heated at 70°C for 4 hours 30 minutes. After cooling to RT, the reaction mixture is poured into water and extracted with AcOEt, the organic phase is washed with 1 N NaOH solution and with saturated NaCl solution and dried over NaSO 4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using DCM and then a DCM/ MeOH mixture (90/10; v/v) as the eluent. The product obtained is taken up with a saturated solution of hydrochloric acid in ether and the precipitate formed is wrung to give 0.49 g of the expected product.

M.p. 260°C (dec.).

The compounds according to the invention which are collated in TABLE II below are prepared by the procedures described in the preceding EXAMPLES.

205 TABLE II 0

CH

2

A-CH-ICH-C-N-CO

a a a a Salt, solvate; Example Am Arl M.p. C or NMR; 10 recrystallization solvent 65 Cl N N- 2 HCI 1 H 2 0 O=C

NMR

NH

2 66

F

N- HC1, 1.5 H 2 0 HN 192-195 DCM/ether

CO-NH

2 67

F

N- F HCI, 1 H 2 0 HN

NMR

ether CO-NH-Me e t h This compound is prepared by the procedure described in EXAMPLE 44 from the compound obtained in step C of EXAMPLE 43 and the compound obtained in Preparation 2.16, in the form of the free base.

This compound is prepared by the procedure described in step B of EXAMPLE 51 from the compound obtained in step A of EXAMPLE 51 and the compound obtained in Preparation 2.17 (free base). After chromatography, the product obtained is dissolved in DCM, a saturated solution of hydrochloric acid in ether is a.

a 206 added until the pH is 1, and the expected hydrochloride is wrung.

This compound is prepared by the procedure described in step B of EXAMPLE 51 from the compound obtained in step A of EXAMPLE 51 and the compound obtained in Preparation 2.18 (free base). After chromatography, the product obtained is taken up with a saturated solution of hydrochloric acid in ether and the expected hydrochloride is wrung.

10 Proton NMR spectrum of EXAMPLE 65 at 200 MHz in DMSO-d 6 6: 0.8 to 4.2 ppm u 28H; 7.0 to 7.8 ppm u 8H; 7.9 to 8.6 ppm 2s 2H; 10.4 to 11.6 ppm u 2H.

Proton NMR spectrum of EXAMPLE 67 at 200 MHz in DMSO-d 6 6 2.0 to 4.2 ppm u 21 H 5.9 ppm mt 1 H 6.75 ppm s 1 H 7.0 to 7.8 ppm u 8 H 10.95 ppm s 1 H.

EXAMPLE 68 4-Benzoyl-2-(3,4-difluorophenyl)-2-[2-(4phenyl-4-ureidopiperid-l-yl)ethyl]morpholine hydrochloride dihydrate, isomer A) 4-Benzoyl-2-(3,4-difluorophenyl)-2-(formylmethyl)morpholine, isomer A solution of 2.6 ml of oxalyl chloride in 59 ml of DCM is cooled to -78°C under a nitrogen atmosphere and a solution of 4.6 ml of DMSO in 29.5 ml of DCM is added dropwise, followed by a solution of 8.2 g of the compound obtained in step B of EXAMPLE 37 in 59 ml of DCM and 5.7 ml of DMSO. The reaction mixture is stirred for 30 minutes at -60'C, 16 ml of triethylamine are then added and the reaction mixture is stirred 207 while the temperature is allowed to rise to RT. It is washed with 1 N HC1 solution, with water, with saturated NaHCO, solution and with water, the organic phase is dried over MgSO, and the solvent is evaporated off under vacuum to give 7.5 g of the expected product in the form of an oil.

B) 4-Benzoyl-2-(3,4-difluorophenyl)-2-[2-(4-phenyl-4ureidopiperid-l-yl)ethyl]morpholine hydrochloride dihydrate, isomer 10 A solution of 2.5 g of the compound obtained in the previous step in 26 ml of MeOH is added at RT to a solution of 1.6 g of 4-phenyl-4-ureidopiperidine (free base) and 0.4 ml of acetic acid in 26 ml of MeOH and the mixture is stirred for 5 minutes at RT. A solution of 0.5 g of sodium cyanoborohydride in 26 ml of MeOH is then added all at once and the reaction mixture is stirred for 4 hours at RT. It is poured into 200 ml of Na 2

CO

3 solution and extracted with AcOEt, the organic phase is washed with water and dried over MgSO, and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a gradient of a DCM/MeOH mixture (from 100/5; v/v to 100/7.5; v/v) as the eluent. The product obtained is dissolved in DCM, a saturated solution of hydrochloric acid in ether is added until the pH is 1, and the precipitate formed is wrung to give 1.6 g of the expected product.

M.p. 187-190'C.

+22.5° (c 1; MeOH) EXAMPLE 69 4-Benzoyl-2-(3,4-difluorophenyl)-2-[2-[4-(N'methylureido)-4-phenylpiperid-l-yl]ethyl]morpholine hydrochloride monohydrate, isomer This compound is prepared by the procedure described in step B of EXAMPLE 68 from 1.85 g of methylureido)-4-phenylpiperidine (free base), 0.44 ml 208 of acetic acid and 26 ml of MeOH, and then 2.75 g of the compound obtained in step A of EXAMPLE 68 in 26 ml of MeOH and 0.55 g of sodium cyanoborohydride in 26 ml of MeOH. This gives 2 g of the expected product.

M.p. 170-173°C.

2 0 +23.4° (c 1; MeOH) EXAMPLE 4-Benzoyl-2-(3,4-difluorophenyl)-2-[2-[4-(3,3dimethylcarbazoyl)-4-phenylpiperid-l-yl]ethyl]morpho- 10 line dihydrochloride 1.5 hydrate, isomer This compound is prepared by the procedure described in step B of EXAMPLE 68 from 1.55 g of 4- (3,3-dimethylcarbazoyl)-4-phenylpiperidine (free base) and 0.38 ml of acetic acid in 26 ml of MeOH, and then 2.4 g of the compound obtained in step A of EXAMPLE 68 in 26 ml of MeOH and 0.47 g of sodium cyanoborohydride in 26 ml of MeOH. This gives 1.82 g of the expected product.

2 0 +22.50 (c 1; MeOH) EXAMPLE 71 2-(3,4-Difluorophenyl)-4-[2-(3-isopropoxyphenyl)acetyl]-2-[2-[4-phenyl-l-azoniabicyclo[2.2.2]oct-l-yl]ethyl]morpholine chloride monohydrate A) 2-[2-(Benzoyloxy)ethyl]-2-(3,4-difluorophenyl)-4- [2-(3-isopropoxyphenyl)acetyl]morpholine 3.2 g of BOP are added at RT to a solution of 2.1 g of the compound obtained in Preparation 1.21, 1.2 g of 2-(3-isopropoxyphenyl)acetic acid and 2.2 ml of triethylamine in 50 ml of DCM and the reaction mixture is stirred for 15 minutes at RT. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with 1 N HC1 solution, with water and with 10% Na2CO, solution and dried over MgSO, and the solvent is evaporated off under vacuum to give 3.2 g of the expected product in the form of an oil.

209 B) 2-(3,4-Difluorophenyl)-2-(2-hydroxyethyl)-4-[2-(3isopropoxyphenyl)acetyl]morpholine A mixture of 3.2 g of the compound obtained in the previous step, 2 ml of concentrated NaOH solution and 50 ml of MeOH is stirred for 2 hours at RT. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed twice with water and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 2.3 g of the expected product in the form of an oil.

C) 2-(3,4-Difluorophenyl)-4-[2-(3-isopropoxyphenyl)acetyl]-2-[2-(methanesulfonyloxy)ethyl]morpholine 0.93 ml of triethylamine and then 0.51 ml of e.'g methanesulfonyl chloride are added to a solution of 2.3 g of the compound obtained in the previous step in 50 ml of DCM and the mixture is stirred for 15 minutes at RT. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and with 10% Na 2

CO

3 solution and dried over MgSO, and the solvent is evaporated off under vacuum to give 2.7 g of the expected product in the form of an oil.

D) 2-(3,4-Difluorophenyl)-4-[2-(3-isopropoxyphenyl)acetyl]-2-[2-[4-phenyl-l-azoniabicyclo[2.2.2]oct-lyl]ethyl]morpholine chloride monohydrate A mixture of 1.3 g of the compound obtained in the previous step and 0.72 g of 4-phenyl-l-azabicyclo- [2.2.2]octane in 1.5 ml of DMF is heated at 90"C for hours. After cooling to RT, the reaction mixture is poured into 1 N HC1 solution and extracted with DCM, the organic phase is washed with 1 N HC1 solution and with saturated NaC1 solution and dried over MgSO, and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using DCM and then a DCM/MeOH mixture (90/10; v/v) as the eluent to give 0.38 g of the expected product after crystallization from iso ether. M.p. 136'C (dec.).

210 EXAMPLE 72 2-(3,4-Difluorophenyl)-4-[2-(3-isopropoxyphenyl)acetyl]-2-[2-[4-(piperid-l-yl)piperid-1-yl]ethyl]morpholine dihydrochloride hemihydrate A mixture of 1.3 g of the compound obtained in step C of EXAMPLE 71 and 1.1 g of 4-(piperid-l-yl)piperidine in 4 ml of DMF is heated at 70°C for 4 hours. After cooling to RT, the reaction mixture is poured into iced water and extracted with AcOEt, the organic phase is washed with 1 N NaOH solution and with saturated NaCl solution and dried over Na2SO4 and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using DCM and then a DCM/ MeOH mixture (90/10; v/v) as the eluent. The product obtained is taken up with a saturated solution of hydrochloric acid in ether and the precipitate formed is wrung to give 0.49 g of the expected product.

M.p. 270°C (dec.).

EXAMPLE 73 2-(3,4-Difluorophenyl)-2-[2-[4-phenyl-l-azoniabicyclo[2.2.2]oct-l-yl]ethyl]-4-[3,5-bis(trifluoromethyl)benzoyl]morpholine chloride 1.5 hydrate A) 2-[2-(Benzoyloxy)ethyl]-2-(3,4-difluorophenyl)-4- A solution of 2.1 g of the compound obtained in Preparation 1.21 and 1 ml of triethylamine in 50 ml of DCM is cooled to 0°C, 1.24 ml of methyl)benzoyl chloride are added dropwise and the reaction mixture is stirred for 5 minutes. It is washed twice with water, the organic phase is dried over MgSO 4 and the solvent is evaporated off under vacuum to give 3.5 g of the expected product in the form of an oil.

211 B) 2-(3,4-Difluorophenyl)-2-(2-hydroxyethyl)-4-[3,5bis(trifluoromethyl)benzoyl]morpholine A mixture of 3.5 g of the compound obtained in the previous step, 2 ml of concentrated NaOH solution and 50 ml of MeOH is stirred for 2 hours at RT. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed twice with water and dried over MgSO 4 and the solvent is evaporated off under vacuum to give 0.84 g of the expected product after crystallization from an iso ether/pentane mixture. M.p. 101°C.

C) 2-(3,4-Difluorophenyl)-2-[2-(methanesulfonyloxy)ethyl]-4-[3,5-bis(trifluoromethyl)benzoyl]morpholine 0.5 ml of triethylamine is added to a solution of 0.84 g of the compound obtained in the previous step in 10 ml of DCM, the mixture is cooled to 0°C, 0.26 ml of methanesulfonyl chloride is then added and the reaction mixture is stirred for 5 minutes at RT. It is washed twice with water, the organic phase is dried over MgSO 4 and the solvent is evaporated off under vacuum to give 0.98 g of the expected product.

D) 2-(3,4-Difluorophenyl)-2-[2-[4-phenyl-l-azoniabicyclo[2.2.2]oct-l-yl]ethyl]-4-[3,5-bis(trifluoromethyl)benzoyl]morpholine chloride 1.5 hydrate A mixture of 0.98 g of the compound obtained in the previous step and 0.65 g of 4-phenyl-l-azabicyclo- [2.2.2]octane in 1 ml of DMF is heated at 100"C for 3 hours. After cooling to RT, the reaction mixture is poured into 1 N HC1 solution and extracted with DCM, the organic phase is washed with 1 N HC1 solution and with saturated NaCl solution and dried over MgSO, and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using DCM and then a DCM/MeOH mixture (90/10; v/v) as the eluent to 212 give 0.42 g of the expected product after crystallization from iso ether. M.p. 170°C (dec.).

EXAMPLE 74 5-[2-(4-Acetamido-4-phenylpiperid-l-yl)ethyl]- 3-benzoyl-5-(3,4-dichlorophenyl)oxazolidine hydrochloride monohydrate A) 3-Benzoyl-5-(3,4-dichlorophenyl)-5-(2-hydroxyethyl)oxazolidine A solution of 1.23 g of benzoyl chloride in 10 ml of DCM is added dropwise at RT to a solution of 3.2 g of the compound obtained in Preparation 1.22 and 1 g of triethylamine in 50 ml of DCM and the mixture is stirred for 1 hour at RT. A further 1.76 g of triethylamine and then 2.46 g of benzoyl chloride are added and the mixture is stirred for 1 hour at RT. It is concentrated under vacuum, the residue is taken up with water and extracted with AcOEt, the organic phase is washed with a buffer solution of pH 2 and with saturated NaCl solution and dried over NaSO 4 and the solvent is evaporated off under vacuum. The residue is taken up with 30 ml of MeOH, 2 ml of 30% NaOH solution *:*are added and the mixture is stirred for 30 minutes at RT. It is concentrated under vacuum, the residue is extracted with ether, the organic phase is washed with water and dried over Na 2 SO, and the solvent is evaporated off under vacuum. The residue is chromatographed on silica H using a DCM/MeOH mixture (100/1.5; v/v) as the eluent to give 1.6 g of the expected product.

B) 3-Benzoyl-5-(3,4-dichlorophenyl)-5-[2-(methanesulfonyloxy)ethyl]oxazolidine A solution of 0.55 g of methanesulfonyl chloride in 5 ml of DCM is added dropwise at RT to a solution of 1.6 g of the compound obtained in the previous step and 0.485 g of triethylamine in 50 ml of DCM and the mixture is stirred for 30 minutes at RT. It is 213 concentrated under vacuum, the residue is extracted with AcOEt, the organic phase is washed with water and dried over Na 2

SO

4 and the solvent is evaporated off under vacuum to give 1.9 g of the expected product.

C) 5-[2-(4-Acetamido-4-phenylpiperid-l-yl)ethyl]-3benzoyl-5-(3,4-dichlorophenyl)oxazolidine hydrochloride monohydrate A mixture of 1.8 g of the compound obtained in the previous step, 1.7 g of 4-acetamido-4-phenylpiperi- 10 dine p-toluenesulfonate and 1.7 g of K 2 CO, in 4 ml of DMF is heated at 80-100'C for 2 hours. After cooling to RT, the reaction mixture is poured into water and the precipitate formed is wrung and dried under vacuum. The precipitate is chromatographed on silica H using a DCM/MeOH mixture (100/3; v/v) as the eluent.

The product is dissolved in DCM, a saturated solution of hydrochloric acid in ether is added until the pH is 1, and the precipitate formed is wrung to give "d 1 g of the expected product. M.p. 165-170'C.

EXAMPLE 5-(3,4-Difluorophenyl)-5-[2-[4-phenyl-l-azoniabicyclo[2.2.2]oct-1-yl]ethyl]-3-[3,5-bis(trifluoromethyl)benzyl]oxazolidin-2-one chloride monohydrate, isomer A) 5-[2-(Benzoyloxy)ethyl]-5-(3,4-difluorophenyl)-3- [3,5-bis(trifluoromethyl)benzyl]oxazolidin-2-one, isomer This compound is prepared by the procedure described in step A of EXAMPLE 50 from the compound obtained in Preparation 1.23 isomer).

B) 5-(3,4-Difluorophenyl)-5-(2-hydroxyethyl)-3-[3,5bis(trifluoromethyl)benzyl]oxazolidin-2-one, isomer This compound is prepared by the procedure described in step B of EXAMPLE 50 from the compound 214 obtained in the previous step.

C) 5-(3,4-Difluorophenyl)-5-[2-(methanesulfonyloxy)ethyl]-3-[3,5-bis(trifluoromethyl)benzyl]oxazolidin- 2-one, isomer This compound is prepared by the procedure described in step C of EXAMPLE 50 from the compound obtained in the previous step.

D) 5-(3,4-Difluorophenyl)-5-[2-[4-phenyl-1-azoniabicyclo[2.2.2]oct-l-yl]ethyl]-3-[3,5-bis(trifluoromethyl)benzyl]oxazolidin-2-one chloride monohydrate, isomer This compound is prepared by the procedure described in step D of EXAMPLE 50 from the compound obtained in the previous step and 4-phenyl-l-azabicyclo[2.2.2]octane.

20 +36.2° (c 1; MeOH) EXAMPLE 76 4-Benzoyl-2-[3-[4-carbamoyl-4-(piperid-l-yl)piperid-l-yl]propyl]-2-(3,4-dichlorophenyl)morpholine 20 dihydrochloride This compound is prepared by the procedure described in step C of EXAMPLE 19 from the compound obtained in step B of EXAMPLE 19 and the compound obtained in Preparation 2.16.

25 EXAMPLE 77 2-(3,4-Dichlorophenyl)-4-[2-(3-chlorophenyl)acetyl]-2-[2-[4-phenyl-l-azoniabicyclo[2.2.2]oct-1- 0000 yl]ethyl]morpholine chloride A) 2-[2-(Benzoyloxy)ethyl]-2-(3,4-dichlorophenyl)-4- [2-(3-chlorophenyl)acetyl]morpholine This compound is prepared by the procedure described in step A of EXAMPLE 71 from the compound obtained in Preparation 1.19 and 2-(3-chlorophenyl)acetic acid.

215 B) 2-(3,4-Dichlorophenyl)-4-[2-(3-chlorophelyl)acetyl]- 2-hydroxyethyl )morpholine This compound is prepared by the procedure described in step B of EXAMPLE 71 f rom the compound obtained in the previous step.

C) 3,4-Dichlorophenyl)-4-[2-( 3-chlorophenyl)acetyl]- 2- [2-(methanesulfonyloxy)ethyl )morpholine This compound is prepared by the procedure described in step C of EXAMPLE 71 f rom the compound obtained in the previous step and methanesulfonyl chloride.

D) 2.-(3,4-Dichlorophenyl)-4-[2-(3-chlorophenyl)acetyl]- 2- 4-phenyl-l-azoniabicyclo[ 2.2.2 ]oct-1-yl 1ethyl ]morpholine chloride This compound is prepared by the procedure described in step D of EXAMPLE 71 f rom the compound obtained in the previous step and 4-phenyl-l-azabicyclo[ 2.2.2 ]octane.

Proton NMR spectrum at 200 MHz in DMSO-d 6 20 6 2.0 to 2.5 ppm :u 8 H ;2.55 to 4.6 ppm :u: 0 V.16 H 7.0 to 8.0 ppm :u :12 H.

EXAMPLE 78 3,4-Dichlorophenyl (3-chlorophenyl) acetyl [4-benzyl-l-azoniabicyclo oct-l-yl]Iethyl imorpholine chloride This compound is prepared by the procedure described in step D of EXAMPLE 71 from the compound obtained in step C of EXAMPLE 77 and 4-benzyl-l-azabicyclo[ 2.2. 21octane.

P:\OPERMKR\46669-96DIV 1815/99 -216- Throughout this specification and the claims which follow, unless the context requires otherwise, the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated integer or group of integers but not the exclusion of any other integer or group of integers.

ee

Claims (4)

1. A compound of the formula D E-O-(CH)-C-L (XXXX) I Ar, in which: m is 2 or 3 Ar l is a phenyl which is unsubstituted or monosubsti- tuted or polysubstituted by a substituent selected from a halogen atom, a hydroxyl, a (Ca-C 4 )-alkoxy, a (C -C 4 )-alkyl, a trifluoromethyl and a methylene- dioxy, said substituents being identical or differ- ent; a thienyl which is unsubstituted or substituted by a halogen atom; a benzothienyl which is unsubsti- tuted or substituted by a halogen atom; a naphthyl which is unsubstituted or substituted by a halogen atom; an indolyl which is unsubstituted or N-substi- 20 tuted by a (C,-C,)-alkyl or a benzyl; an imidazolyl which is unsubstituted or substituted by a halogen atom; a pyridyl which is unsubstituted or substituted by a halogen atom; or a biphenyl; E is a hydrogen or an O-protecting group; 25 L is a cyano group or an aminomethyl group; D is a group selected from: -CH 2 -OH, -N-R S* 30 M G is a hydrogen or an O-protecting group; M is a hydrogen or an N-protecting group; and R 1 is a hydrogen or a (C 1 -C 4 )-alkyl in enantiomerically pure form or in racemic form if L is an aminomethyl group.

2. A compound of the formula (XXXX) according to claim 1, in which D is -CH,-OH, the compound being in enantiomerically pure form or in racemic form if L is an aminomethyl group.

3. A compound of the formula (XXXX) according to claim 1, in which D is wherein G is as defined in claim 1, the compound being in enantiomerically pure form or in racemic form if L is an aminomethyl group.

4. A compound of the formula (XXXX) according to claim 1, in which D is wherein M and R, are as defined in claim 1, the compound being in enantiomerically pure form or in racemic form if L is an aminomethyl group. DATED this 19th day of May, 1999 Sanofi By DAVIES COLLISON CAVE Patent Attorneys for the Applicant S