PURPOSE: To obtain a new butadiene derivative, having the high charge transfer ability, excellent in light stability and capable of providing electrophotographic photoreceptors, having high sensitivity and improved in durability.

CONSTITUTION: A compound expressed by formula I [R1 to R3 are H, substitutable alkyl or alkoxy; (n) is 1-5]. The compound expressed by formula I is obtained by converting a 4-bromo-p-terphenyl derivative expressed by formula II into a Grignard reagent, reacting the resultant Grignard reagent with a 4-acetyl-p-terphenyl derivative expressed by formula III, then reacting the obtained 1,1-di(p-terphenylyl)ethylene derivative expressed by formula IV with a Vilsmeier reagent obtained from N,N-dimethylformamide and phosphorus oxychloride, affording an acrolein derivative expressed by formula V and reacting the prepared acrolein derivative with a trialkyl 1,1- diphenylmethylphosphite derivative expressed by formula VI (R6 is 1-4C alkyl).