Patent ID: 6284876
Filing Date: 2001-09-04
Classification: C09B

Abstract:
A process for the preparation of compounds of formula (I) ##STR17##or a salt thereof, or a mixture of such compounds or salts, in whichX.sub.1 is --SO.sub.2 Z,X.sub.2 is --NRQ,Z is a group --CH.dbd.CH.sub.2 or --CH.sub.2 CH.sub.2 Y in which Y is a group which can be split off under alkaline conditions,each R is independently hydrogen, C.sub.1-4 alkyl or C.sub.1-4 hydroxyalkylQ is ##STR18##or mixtures thereof which is characterized by coupling a compound of formula (II) ##STR19##with a diazotized amine of formula (II) ##STR20##in which X.sub.1 is the moiety --SO.sub.2 Z and X.sub.2 is --NRQ, and optionally compounds with the moiety --SO.sub.2 CH.sub.2 CH.sub.2 Y converting to compounds with the moiety --SO.sub.2 CH.dbd.CH.sub.2.