| 摘要 |
A disazo compound having the general formula (1) <IMAGE> (1) <IMAGE> (wherein X represents a substituted or unsubstituted aromatic ring or hetero ring, and Ar represents a substituted or unsubstituted aromatic ring or hetero ring); a method of making said disazo compound which comprises using, as a starting material, couplers having the general formula (2) <IMAGE> and the general formula (4) <IMAGE> (wherein X and Ar are the same as defined above); and a multilayer type electrophotographic element using said disazo compound as a charge transfer substance.
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