Patent ID: 6022997
Filing Date: 2000-02-08
Classification: C07C

Abstract:
A process for the preparation of a triphenylamine compound of the general formula (2) ##STR11## wherein Ar.sub.1 to Ar.sub.6 each represent an unsubstituted phenyl radical or a substituted phenyl radical having one or more substituents on the phenyl nucleus in which the substituents may be the same or different and each comprise an alkyl group of 1 to 4 carbon atoms, an alkoxy group of 1 to 4 carbon atoms, an amino group, an alkylamino group of 1 to 4 carbon atoms, a dialkylamino group of 1 to 4 carbon atoms, an alkylthio group of 1 to 4 carbon atoms, a halogen atom, or a halogenoalkyl group of 1 to 4 carbon atoms, and R.sub.1 to R.sub.6 may be the same or different and each represent a hydrogen atom or a methyl group, said process comprising the steps of converting at least one halogen compound of the general formula (1) ##STR12## wherein R.sub.7 and R.sub.8 may be the same or different and each represent a hydrogen atom or a methyl group, Ar.sub.7 and Ar.sub.8 may be the same or different and each represent an unsubstituted phenyl radical or a substituted phenyl radical having one or more substituents on the phenyl nucleus in which the substituents may be the same or different and each comprise an alkyl group of 1 to 4 carbon atoms, an alkoxy group of 1 to 4 carbon atoms, an amino group, an alkylamino group of 1 to 4 carbon atoms, a dialkylamino group of 1 to 4 carbon atoms, an alkylthio group of 1 to 4 carbon atoms, a halogen atom, or a halogenoalkyl group of 1 to 4 carbon atoms, and X represents a halogen atom, into a lithio compound, and reacting the lithio compound with a nitrogen trihalide in which the three halogen atoms joined to the nitrogen atom may be the same or different.