Mita Industrial Co., Ltd.

Syunichi Matsumoto

Hirofumi Kawaguchi

Nobuko Akiba

Yuji Tanaka

Yasufumi Mizuta

Toshiyuki Fukami

Ichiro Yamazato

Hisakazu Uegaito

Fumio Sugai

Yukimasa Watanabe

Hiroaki Iwasaki

Yasuyuki Hanatani

Sakae Saito

Sakae Saitoh

The present invention provides a novel tryptanthrine derivative represented by a general formula: ##STR1## wherein R.sup.1 is an oxygen atom, or group represented by a formula: ##STR2## wherein R.sup.2A and R.sup.2B are the same or different and indicate a hydrogen atom, a cyano group, an acyl group, an alkoxycarbonyl group or an alkyl group, provided that R.sup.2A and R.sup.2B are not hydrogen atoms simultaneously; and R.sup.3A, R.sup.3B, R.sup.3C, R.sup.3D, R.sup.4A, R.sup.4B, R.sup.4C and R.sup.4D are the same or different and indicate a hydrogen atom or an alkyl group which may have a substituent, provided that when R.sup.1 is an oxygen atom, any one of R.sup.3A through R.sup.4D is a cyano group. Such a tryptanthrine derivative has an excellent electron transport capability to be suitably used for the electrophotosensitive material.

Tryptanthrine compounds

The present invention provides a tryptoanthrinimine derivative represented by the general formula (Y): ##STR1## wherein R.sup.A to R.sup.M are as defined. Such a derivative of the general formula (Y) is superior in electron transferring capability. Accordingly, an electrophotosensitive material comprising a photosensitive layer containing this derivative (Y) is superior in sensitivity.

Tryptoanthrinimine derivative and electrophotosensitive material using

The present invention provides a trinitrofluorenonimine derivative represented by the general formula (I): ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are the same or different and indicate an alkyl group which may have a substituent. Such a derivative is superior in electron transferring capability. Accordingly, the electrophotosensitive material having the photosensitive layer containing this derivative is superior in sensitivity.

Trinitrofluorenonimine derivative and electrophotosensitive material

The present invention provides a novel trinitrofluorenonimine derivative represented by the general formula (1): ##STR1## wherein R.sup.0 is an alkyl group; and R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are the same or different and indicate a hydrogen atom, an alkyl, an alkoxy, an aryl, an aralkyl, a halogen atom or an alkyl halide. This derivative is superior in electron transferring capability and compatibility with binding resin. Accordingly, an electrophotosensitive material comprising this derivative as an electron transferring material is superior in sensitivity.

Trinitrofluoroenonimine derivative and electrophotosensitive material

According to the present invention, there is provided a novel tryptoanthorine derivative represented by the formula: ##STR1## wherein R.sup.1a, R.sup.1b, R.sup.1c, R.sup.1d, R.sup.2a, R.sup.2b, R.sup.2c, and R.sup.2d are the same or different and indicate a hydrogen atom, an alkyl group or a halogenated alkyl group; provided that R.sup.1a, R.sup.1b, R.sub.1c and R.sup.1d do not indicate a hydrogen atom, simultaneously. Tryptoanthorine and a derivative thereof are suitably used for an electrophotosensitive material because of their excellent electron transferring capability.

Tryptoanthorine derivative contained in electrophotosensitive material

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Osaka, Japan

Syunichi Matsumoto