| 摘要 |
The present invention provides trisazo compounds expressed by the general formula I <IMAGE> [wherein A represents <IMAGE> <IMAGE> <IMAGE> +TR <IMAGE> (wherein R represents hydrogen, alkyl radical, alkoxy radical, nitro radical, dialkylamino radical or halogen, and n is an integer of 1, 2 or 3, R may be either identical or different when n is an integer of 2 or 3)]; a process for the preparation of said trisazo compounds; and electrophotographic sensitive materials having a high sensitivity as well as a high flexibility which comprise a conductive support and a photosensitive layer containing a trisazo compound, as an effective ingredient thereof, which is expressed by the general formula II <IMAGE> [wherein A' represents <IMAGE> (wherein Z represents aromatic rings such as benzene ring, naphthalene ring, etc., hetero rings such as indole ring, carbazole ring, benzofuran ring, etc. or their substituents, Ar1 represents aromatic rings such as benzene ring, naphthalene ring, etc., hetero rings such as dibenzofuran ring, etc. or their substituents, Ar2 and Ar3 represent aromatic rings such as benzene ring, naphthalene ring, etc. or their substituents, R1 and R3 represent hydrogen, lower alkyl radical, phenyl radical or their substituents, and R2 represents lower alkyl radical, carboxyl radical or their esters)].
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