TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (disclosed): Benzene compound of formula (6) and phenyl amine of formula (12) are reacted in ratio of 1:1-1:1.2 in a solvent such as xylene in the presence of a catalyst such as palladium-type catalyst at 80-140degreesC for 2-10 hours to obtain phenyl amine derivative of formula (13). The obtained phenyl amine derivative (13) and diphenyl hydrazine of formula (11) are reacted in the ratio of 1:1-1:1.2 in the solvent in the presence of the catalyst at 80-140degreesC for 2-5 hours to obtain triphenyl amine derivative (1).R1,R2,n=same as defined above;andX1-X4=halogen atom.Preferred Component: An electrophotographic photoreceptor (10) has an electroconductive substrate (12) and a photoreceptor layer (14) containing triphenylamine derivative (1) provided on the electroconductive substrate. SPECIFIC COMPOUNDS - The triphenyl amine derivative is (4-((E)-3-(diphenyl-hydrazono)-propenyl)-phenyl)-phenyl-(4-((1E,3E)-4-phenyl-buta-1,3-dienyl)-phenyl)-amine of formula (1) (disclosed).    EXAMPLE - Bicyclohexyl biphenyl phosphine (in g) (0.0662), 1-chloro-4-((1E,3E)-4-phenyl-buta-1,3-dienyl)-benzene (8.9), palladium bis(dibenzylidene acetone) (0.0864), t-butoxy sodium (5.3) and phenyl amine (3.4) were added to flask, and ortho xylene (500 mL) was added, stirred for 5 hours and heated at 120degreesC. The reaction mixture was cooled to room temperature and organic layer was washed with ion exchange water. The organic layer was dried and xylene was distilled. Phenyl-(4-((E)-4-phenyl-buta-1,3-dienyl)-phenyl)-amine (9.3) of formula (13) was obtained with yield of 85%. The obtained compound of formula (13) (5.3), bicyclohexyl biphenyl phosphine (0.0318), palladium bis(dibenzylidene acetone) (0.0414), t-butoxy sodium (2.6) and N'-((E)-3-(4-chloro-phenyl)-prop-2-en-(E)-ylidene)-N,N-diphenyl-hydrazine of formula (11) (6) were added to flask, and ortho xylene (200 mL) was added, stirred for 5 hours and heated at 120degreesC. The reaction mixture was cooled to room temperature and organic layer was washed with ion exchange water. The organic layer was dried and xylene was distilled. (4-((E)-3-(diphenyl-hydrazono)-propenyl)-phenyl)-phenyl-(4-((1E,3E)-4-phenyl-buta-1,3-dienyl)-phenyl)-amine of formula (1) (8.5) was obtained with yield of 80%. A photoreceptor layer was formed using the obtained triphenyl amine compound (1) as hole transport agent. An electrophotographic photoreceptor having the photoreceptor layer was manufactured with excellent sensitivity.