TECHNOLOGY FOCUS - IMAGING AND COMMUNICATION - Preferred Layer: An electrophotographic photoreceptor (10) has photoreceptor layer (14) containing the triarylamine derivative of formula (I) which is provided on electroconductive substrate (12).    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (disclosed): Propenyl benzene containing compound of formula (II) and phosphorous acid triethyl are reacted at 160-200degreesC for 2-6 hours, to obtain phosphoric acid containing compound of formula (III). Then, the obtained compound (III) is reacted with benzaldehyde of formula (IV) in the presence of sodium alcoholate as a catalyst at -20degreesC to 30degreesC for 5-30 hours, to obtain butadienyl benzene containing compound of formula (V). Then, the obtained compound of formula (V) and N,N-dimethylamine compound with naphthalene of formula (VI) are reacted in the presence of palladium type catalyst at 80-140degreesC for 2-5 hours, to obtain triarylamine derivative of formula (I).R1-R6, Ar1 and n=same as defined above. SPECIFIC COMPOUNDS - 3 triarylamine derivatives of formula (I) such as naphthalen-1-yl-phenyl-(3-(E)styryl-phenyl)-amine, naphthalen-2-yl-phenyl-(3-(E)styryl-phenyl)-amine and naphthalen-1-yl-phenyl-(3-(1E,3E)-4-phenyl-buta-1,3-dienyl-phenyl-)-amine, are disclosed.    EXAMPLE - 1-bromo-3-methylbenzene of formula (VII) (in g) (20) and phosphorous acid triethyl (30) were added, stirred and heated at 180degreesC for 8 hours, to obtain a compound of formula (VIII) (27) having yield of 90%. Compound of formula (VIII) (50), tetrahydrofuran (100 ml) and sodium carbonate (15.2) were added and stirred at 0degreesc for 30 minutes. Subsequently, benzaldehyde (6) and tetrahydrofuran (200 ml) were added to the reaction liquid and stirred at room temperature for 12 hours. The solvent was distilled off and the residue was purified, to obtain 1-bromo-3-((E)-2-phenylvinyl)benzene of formula (IX) (10.6). 1-naphthyl amine of formula (X) (10.8), bicyclo hexyl biphenyl phosphine (0.066), palladium bis (dibenzylidene acetone) (0.086) tertiary sodium butoxide (7.68) and cholorobenzene (8.96) were added to xylene (500 ml), stirred and heated at 120degreesC for 5 hours. After cooling, xylene was distilled off and the residue was purified, to obtain N-1-naphthyl-N-phenylamine of formula (XI) (13.4). 1-bromo-3-((E)-2-phenylvinyl)benzene of formula (IX) (4.7), bicyclo hexyl biphenyl phosphine (0.016), palladium bis (dibenzylidene acetone) (0.02), tertiary sodium butoxide (2.88) and N-1-naphthyl-N-phenylamine of formula (XI) (3.96) were added to xylene (200 mL), stirred and heated at 120degreesC for 3 hours. After cooling, xylene was distilled off and the residue was purified, to obtain naphthalen-1-yl-phenyl-(3-(E)styryl-phenyl)-amine (5.75). An electrophotographic photoreceptor was formed using the obtained naphthalen-1-yl-phenyl-(3-(E)styryl-phenyl)-amine. The obtained electrophotographic photoreceptor had favorable electrical property, and absence of crystallization.