Triarylamine compounds useful in electrophotographic photoreceptors

A process of producing a triaryl amine compound represented by formula (I) ##STR75## wherein Ar.sub.1 and Ar.sub.2 each represents a phenyl group, a phenyl group substituted with an alkyl group having 1 to 5 carbon atoms or an alkoxy group having 1-5 carbon atoms or a condensed ring group that is a naphthyl group, an anthracenyl group, a pyrenyl group, a fluorenyl group or any of a naphthyl group, an anthracenyl group, a pyrenyl group, or a fluorenyl group substituted with an alkyl group having 1-5 carbon atoms, which comprises acetylating an amino compound represented by the Formula Ar.sub.1 -NH.sub.2, carrying out a condensation reaction of the acetylated amino compound with a mixture of 3-bromo-o-xylene and 4-bromo-o-xylene to form a diarylamine compound represented by Formula (II) ##STR76## and then carrying out a condensation reaction of the diarylamine compound with a halogenated aryl compound represented by the formula Ar.sub.2 -X.sub.1, wherein X.sub.1 represents a bromine atom or an iodine atom.

A triarylamine compound represented by formula ##STR77## wherein, Ar.sub.1 represents a phenyl group substituted with at least a phenyl group or substituted with a phenyl group substituted with an alkyl group having 1 to 5 carbon atoms or with an alkoxy group having 1-5 carbon atoms and Ar.sub.2 represents a phenyl group substituted with an alkyl group having 3-5 carbon atoms or an alkoxy group having 1-5 carbon atoms.