Patent ID: 6111114
Filing Date: 2000-08-29
Classification: C07C,C07D

Abstract:
A process for the preparation of 4-bromomethyl diphenyl derivatives of general formula I ##STR4## in which R represents CN, COOR.sub.1, CONR.sub.2 R.sub.3 (wherein R.sub.1, R.sub.2 and R.sub.3, which are the same or different, are H, straight or branched C.sub.1 -C.sub.6 alkyl, or C.sub.3 -C.sub.6 cycloalkyl, or optionally substituted tetrazolyl, which process comprises brominating compounds of general formula II ##STR5## in which R has the same meanings as in formula I, using Br.sub.2 or HBr aqueous solutions, in the presence of H.sub.2 O.sub.2 aqueous solutions and of optionally halo aliphatic or aromatic hydrocarbon solvents, at temperatures ranging between 10.degree. C. and the boiling temperature of the solvents used.