Abstract: Piperidine derivatives which are compounds of formula (I) ##STR1## wherein Ar.sub.1 and Ar.sub.2 independently represent a phenyl group optionally substituted by a halogen atom, a thienyl group or a pyridinyl group, A represents an alkylene group of 2 to 6 carbon atoms, X represents a CO group or a bond, R.sub.1 represents a hydrogen atom or an alkyl group of 1 to 4 carbon atoms, either R.sub.2 represents a hydrogen atom and R.sub.3 represents a hydrogen atom or a hydroxy group, or R.sub.2 and R.sub.3 together represent a bond, and R.sub.4 represents a hydrogen or halogen atom, or pharmaceutically acceptable acid addition salts thereof are useful as antiallergics and antipruritics.

Abstract: Compounds of the formula: ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 each represent a hydrogen atom, a halogen atom, a (C.sub.1-4)alkoxy radical, a (C.sub.1-4)alkylthio radical, a halogeno(C.sub.1-4)alkyl radical, a (C.sub.1-4)alkyl radical or a cycloalkyl-alkoxy-alkoxy radical or two of the adjacent R symbols together form a methylenedioxy or ethylenedioxy radical, R.sub.6 represents a hydrogen atom, a (C.sub.1-4)alkyl radical, a (C.sub.3-6)cycloalkyl radical or a (C.sub.3-6)cycloalkyl-(C.sub.1-4)alkyl radical, and R.sub.7, R.sub.8 and R.sub.9 each represent a hydrogen atom or a methoxy radical, are new compounds possessing pharmacological properties; they are useful as calcium antagonists and as antihypertensives.

Abstract: New compounds of the formula: ##STR1## wherein R.sub.1 represents a hydrogen atom or an alkanoyl group containing from 1 to 4 carbon atoms, R.sub.2 and R.sub.3 each represent a hydrogen atom or a C.sub.1 -C.sub.4 alkyl group, and R.sub.4 represents a hydroxy or methoxy group in the 6-position or 7-position, have been found to be useful in therapy, and more particularly in the treatment of cardiovascular diseases and Parkinson's disease.

Abstract: Pyridine derivatives of the formula: ##STR1## wherein R represents a group R.sub.1 O(CH.sub.2).sub.2 --, in which R.sub.1 is a (C.sub.3-6)cycloalkyl radical, a (C.sub.3-6)cycloalkyl-(C.sub.1-4)alkyl radical or allyl, and R' represents isopropyl or tert.-butyl, are new compounds useful in therapy in the treatment of cardiovascular maladies.

Abstract: Phenylpiperazine derivatives having the general formula (I) ##STR1## in which R.sub.1 represents a radical S(O).sub.m R.sub.3, S(O).sub.n CF.sub.3 or ##STR2## in which radicals m is 0, 1 or 2, n is 1 or 2, R.sub.3 is an alkyl radical having 1 to 10 carbon atoms and R.sub.4 and R.sub.5 independently represent a hydrogen atom or an alkyl radical having 1 to 4 carbon atoms, or the N atom, R.sub.4 and R.sub.5 together form a heterocyclic ring, which can contain another hetero-atom, and R.sub.2 represents a hydrogen atom, the radical CH.sub.2 --CH.sub.2 --OH or a radical of formula CH.sub.2 --CH.sub.2 --O--COR.sub.6, CH.sub.2 --CH.sub.2 --O--CONHR.sub.6 or CH.sub.2 --CH.sub.2 --O--R.sub.6 in which radicals R.sub.6 being an alkyl radical having 1 to 6 carbon atoms and their pharmaceutically acceptable acid addition salts are useful psychotropic agents and analgesics. Compounds in which R.sub.1 is --SCH.sub.3 and simultaneously R.sub.2 is H are not part of the invention.

Abstract: Phenylpiperazine derivatives corresponding to the formula (I) ##STR1## in which n is 1, 2 or 3 and R represents the tetrahydrofuryl-2 radical, or the radical CH.sub.2 -SH, or a radical CH.sub.2 -S-alkyl, or a radical CH.sub.2 -O-alkyl or a radical CH.sub.2 -S-CO-alkyl, the alkyls having from 1 to 8 carbon atoms,and also their addition salts with pharmaceutically acceptable acids.These compounds are tranquilizers with psychotropic properties which permit their use in anxiety and depression.