Patent ID: 6063920
Filing Date: 2000-05-16
Classification: C07B,C07D

Abstract:
A compound of formula (Ia) or (Ib): ##STR12## wherein A and B each independently represents hydrogen or one, two or three naphthylidene substituents, which substituents are selected from C.sub.1-6 alkyl, C.sub.1-6 alkoxy, aryl, aryloxy, silyl and silyloxy;R.sup.1 represents phenyl, C.sub.1-6 alkyl, phenyl C.sub.1-6 alkyl or a moiety of formula (a): ##STR13## wherein R.sup.2 represents C.sub.1-6 alkyl, phenyl or benzyl, R.sup.3 represents H or OR.sup.4 wherein R.sup.4 is C.sub.1-6 alkyl or C.sub.1-6 alkylsilyl and n is zero or an integer 1 or 2; andX.sup.- is a counter ion.