Patent ID: 6320057
Filing Date: 2001-11-20
Classification: C07D

Abstract:
A process for preparing a compound having the formula (VI): ##STR5##wherein:R.sub.1 is a C.sub.1 -C.sub.3 alkyl or phenyl radical;R.sub.2 is a phenyl or pyridyl radical, said radical being optionally substituted with 1 to 3 substituents selected from the group consisting of a halogen atom, a nitro or cyano group and a C.sub.1 -C.sub.3 alkyl or C.sub.1 -C.sub.3 alkoxy radical;R.sub.4 is a hydrogen atom or an acyl radical; andR.sub.5 is a phenyl, naphthyl, pyridyl, pyrimidinyl, pyridazinyl, pyrazinyl, thienyl, benzothienyl, furyl, benzofuryl, quinolyl, isoquinolyl or methylenedioxyphenyl radical, said radical being optionally substituted with 1 to 7 groups, which are the same or different, selected from the meanings of R.sup.51 ;R.sup.51 is:a halogen atom;an alkyl, haloalkyl, alkoxy, haloalkoxy, alkylthio, haloalkylthio or alkylsulphonyl radical, which is linear or branched and has 1 to 6 carbon atoms;a cycloalkyl, halocycloalkyl, alkenyloxy, alkynyloxy, alkenylthio or alkynylthio radical having 3 to 6 carbon atoms;a nitro or cyano group; oran amino radical which is optionally mono- or disubstituted with an alkyl or acyl radical having 1 to 6 carbon atoms or an alkoxycarbonyl radical of 2 to 6 carbon atoms;said process comprising reacting a compound having formula (I) with a compound having formula (V) below in a solvent and at a temperature of between 20.degree. C. and 100.degree. C., according to the scheme: ##STR6##