| 摘要 |
NEW MATERIAL:Leuco compounds of the formula, wherein R<1>, R<2>, R<3>, R<4> are each a lower alkyl; R<5> is H, a lower alkyl. EXAMPLE:Di-(p-dimethylaminostyryl)-p-methylphenylsulfonylmethane. USE:Color formers for pressure-sensitive recording materials, thermal recording materials and thermal transfer recording materials. PREPARATION:The carbonyl group of bis(p-dimethylaminobenzal)acetone is reduced in the presence of lithium aluminum hydride, and perchloric acid is added thereto to form bis(p-dimethylaminostyryl)carbenium perchlorate. The perchlorate is reacted with sodium p-toluenesulfinate to give bis(p-dimethylaminostyryl)-p- methylphenylsulfonylmethane.
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