Process for preparing biphenyl derivatives suitable for preparing 4-aryl-1-phenylalkyl-1,2,3,6-tetrahydropyridines

摘要

4-Aryl-1-phenyl alkyl-1,2,3,6-tetrahydropyridine derivs. of formula (I), their salts, solvates and quat. ammonium salts are new. Y = CH or N; R1 = H, halo, CF3, 3-4C alkyl or 1-4C alkoxy; R2 = as R1 or OH; R3, R4 = H or 1-3C alkyl; X = 3-6C alkyl, 3-6C alkoxy, 3-7C carboxyalkyl, (1-4C) alkoxycarbonyl(3-6C)alkyl, 3-7C carboxyalkoxy or (1-4C)alkoxycarbonyl(3-6C)alkoxy; or 3-7C cycloalkyl, 3-7C cycloalkoxy, (3-7C)cycloalkylmethyl, 3-7C cycloalkylamino or cyclohexenyl (all opt. substd.); or phenyl, phenoxy, phenylamino, N-(1-3C)alkylphenylamino, phenylmethyl, phenylethyl, phenylcarbonyl, phenylthio, phenylsulphonyl, phenylsulphinyl or styryl (all opt. substd.)