| 摘要 |
PURPOSE:To provide the novel compound sharp in the absorption of light, high in molecular absorption coefficient, excellent in light resistance, and useful for heat-sensitive transfer materials, etc. CONSTITUTION:The compound of formula I [A is the residue of a dyestuff; X is a group substituted on the benzene ring; (n) is 0-4; R1-R4 are (substituted) alkyl, aryl]. For example, a compound of formula II. The compound of formula I is obtained by reacting a compound of formula III with a compound of formula IV. |
