N,N'-bis(p-hydroxymethylphenyl)benzidine compounds and method for preparing the same

Abstract

A N,N'-bis(p-hydroxymethylphenyl)benzidine compound having the following formula (I): ##STR1## wherein R.sub.1 represents a hydrogen atom, a methyl group or a methoxy group; R.sub.2 represents an alkyl group having one to four carbon atoms, a methoxy group or an ethoxy group; and R.sub.3 represents a hydrogen atom or a methyl group, is intended to be used as a charge transporting material of an electrophotographic photoreceptor. A method for preparing the compound includes formylating a N,N'-diphenylbenzidine derivative having the following formula (II): ##STR2## by the conventional Viismeier reaction to obtain a N,N'-bis(p-formylphenyl) benzidine derivative of the following formula (III): ##STR3## and reducing the derivative with a boron hydride salt or an aluminum hydride salt.

Dependencies are inferred from the claim text.