TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (disclosed): Diarylamine of formula (F) is oxidized using sodium nitrite in presence of acetic acid to obtain nitroso compound of formula (E). The nitroso compound (E) is reduced with zinc to obtain diaryl hydrazine of formula (D). Simultaneously, amine derivative of formula (C) having fluorenyl group is formylated by Vilsmeier reaction to obtain formyl compound of formula (B). Diaryl hydrazine (D) is added to formyl compound (B) and heat-condensed in acidic condition to obtain hydrazone-type compound of formula (A). Preferred Component: An electrophotographic photoreceptor has a photosensitive layer containing hydrazone-type compound. An image forming device has the photoreceptor (1), a charging device (2) for electrically charging photoreceptor, an exposure apparatus (3) for exposing charged photoreceptor and forming electrostatic latent image, and an image developing apparatus (4) for developing latent image. Preferred Definitions:    at least one of Ar1-Ar4=phenyl group having hydrocarbon group in para position.    SPECIFIC COMPOUNDS - 8 specific hydrazone-type compounds are disclosed, such as (9,9-dimethyl-9H-fluoren-2-yl)-(4-(diphenyl-hydrazonomethyl)-phenyl)-p-tolyl-amine of formula (A), bis-(9,9-dimethyl-9H-fluoren-2-yl)-(4-(diphenyl-hydrazonomethyl)-phenyl)-amine, (9,9-dimethyl-9H-fluoren-2-yl)-(4-(di-p-tolyl-hydrazonomethyl)-phenyl) -p-tolyl-amine, (9,9-dimethyl-9H-fluoren-2-yl)-(4-(naphthalen-1-yl-phenyl-hydrazonomethyl)-phenyl)-p-tolyl-amine and (9,9-dimethyl-9H-fluoren-2-yl)-(4-(di-p-tolyl-hydrazonomethyl)-phenyl)-phenyl-amine.    EXAMPLE - N-(p-tolyl)-N-((9,9-dimethyl)-2-fluorenyl) aniline (in g) (15) was dissolved in N,N-dimethylformamide (50 ml) in nitrogen atmosphere and stirred. Phosphorus oxychloride (14.72) was dripped, maintained at 65-70 degrees C and stirred for 6 hours. The reaction mixture was cooled, and toluene/desalted water was added and stirred. Organic layer was separated and washed, and solvent was distilled. The resulting product was dried under reduced pressure at 60 degrees C. Formyl compound (14.09) was obtained with yield of 87%. Diphenyl amine (118.46) was dissolved in acetic acid in nitrogen atmosphere and stirred. Aqueous solution of sodium nitrite (259) was added and stirred for 2 hours. Desalted water was added and filtered. The obtained solid was washed and dried at 50 degrees C under reduced pressure. Nitroso compound (128.84) was obtained with yield of 93%. Acetic acid (15 ml) was dripped to reactor, and nitroso compound (11.07), zinc powder (8.44) and methanol (100 ml) were added and stirred. Suction filtration of reaction mixture was carried out. Tetrahydrofuran solution of formyl compound was added to filtrate and reacted. The reaction product was crystallized and solid was separated, dried and purified. (9,9-dimethyl-9H-fluoren-2-yl)-(4-(diphenyl-hydrazonomethyl)-phenyl)-p-tolyl-amine of formula (A) was obtained in the form yellow power at yield of 90%.