Process for preparing triphenylamine compounds by using a nitrogen trihalide

摘要

This invention provides a process for the preparation of triphenylamine compounds useful as charge transport materials. According to this process, a triphenylamine compound of the general formula (2) of the general formula (1) into a lithio compound, and reacting the lithio compound with a nitrogen trihalide. In the above formulae, Ar1 to Ar8 each represent an optionally substituted phenyl radical, R1 to R8 each represent a hydrogen atom or a methyl group, and X represents a halogen atom.