Patent ID: 6096919
Filing Date: 2000-08-01
Classification: C07C,C11D,D06L,D21H

Abstract:
A process for the preparation of sulphonated distyryl-biphenyl compounds of formula: ##STR27## in which R.sub.1 represents hydrogen, C.sub.1 -C.sub.5 alkyl, C.sub.1 -C.sub.5 alkoxy or halogen, R.sub.1A represents hydrogen, C.sub.1 -C.sub.5 alkyl, C.sub.1 -C.sub.5 alkoxy or halogen, and M represents hydrogen, an alkaline- or alkaline earth-metal, or ammonium, which comprises reacting a compound of formula: ##STR28## in which R.sub.2 represents C.sub.1 -C.sub.5 alkyl, with a compound of formula: ##STR29## whereby R.sub.3 represents phenyl, optionally substituted by C.sub.1 -C.sub.4 alkoxy, halogen or SO.sub.3 M, or C.sub.1 -C.sub.12 alkyl, R.sub.4 represents C.sub.2 -C.sub.6 alkylene or phenylene, and M, R.sub.1 and R.sub.1A is defined as above, in an alcoholic or dipolar aprotic solvent and in the presence of a strong base.