| 摘要 |
NEW MATERIAL:The compound of formula I [R<1> and R<2> are alkyl. allyl, benzyl or aryl which may have substituent group or R<1> and R<2> may together with N form a 5- or 6-membered heterocyclic group; R<3> is -C(=O)-R<4> or -SO2-R<5> (R<4> and R<5> are alkyl or phenyl which may have substituent group)]. EXAMPLE:A charge generator of photosensitive material for electrophotography. It can be applied to a displaying material, sensor, or an optical recording medium such as optical disk. PREPARATION:The compound of formula I can be produced by reacting 2mol of the m-phenylenediamine derivative of formula II with 1mol of 3,4-dihydroxy-3- cyclobutene-1,2-dione in an organic solvent e.g. an alcohol such as methanol, ethanol, propanol, etc. or an aromatic hydrocarbon such as benzene, toluene, etc.
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