摘要 |
PURPOSE:To provide excellent coloring properties by incorporating fluoran derivative containing alkylamino group substituted with alkoxycarbonylaryloxy group. aralkyloxycarbonylaryloxy group, etc. at the 6-position as an electron donative colorless dye. CONSTITUTION:Fluoran derivative containing alkylamino group substituted with alkyoxcarbonylaryloxy group, aralkyloxycarbonylaryloxy group or aryloxycarbonylaryloxy group at the 6-position as electron donative colorless dye is contained. The fluoran derivative represented by a formula (1) is desirable. In the formula, R1 and R3 are alkyl group, cycloalkyl group, etc., R2 is hydrogen atom, alkenyl, etc., R4 is hydrogen atom, alkyl group, etc., R5 is alkyl group, alkenyl group, etc., R is alkylene group, alkenylene group, etc., and further may be coupled by oxygen atom, sulfur atom. R6 is hydrogen atom, alkyl group, etc., R7 is hydrogen atom, alkyl group, etc. In the formula, R2' has the same meaning as the R2, R4' has the same meaning as the R4. |