| 摘要 |
PURPOSE:To obtain a new fluoran compound, useful as a color former used in pressure-sensitive and heat-sensitive recording materials, thermal color changing materials, etc., by substituting NH group in a 2-anilino-6-dialkylamino-3- methylfluoran. CONSTITUTION:A 2-anilino-6-dialkylamino-3-methylfluoran expressed by formula I (R1 and R2 are 3-4C alkyl) is used and hydrogen atom bound to nitrogen atom of anilino group in this compound is reacted with a compound such as ethyl orthoformate, a benzoyl halide, an alkyl halogenated carbonate, a benzyl halide, an allyl halide or a dialkyl sulfate to afford the objective fluoran compound expressed by formula II [R<3> is COR4 (R4 is H, 1-4C alkyl, phenyl which may have a substituent group), COOR5 (R5 is 1-4C alkyl), CH2R6 (R6 is phenyl which may have a substituent group), CH2CH=CH2 or 1-4C alkyl]. |
