| 摘要 |
NEW MATERIAL:A compound of formula I (R1, R2, R6, R7 are H, alkyl which may be substituted, cyclohexyl, benzyl which may be substituted, phenyl which may be substituted, further R1 and R2 or R6 and R7 may bind with each other to form a heterocyclic ring; R3, R4 are H, alkyl, acyl; R5 is alkyl; R8 is halogen; n is 0-4; where R1 and R2 or R6 and R7 are not H simultaneously). EXAMPLE:3-( 4-Pyrrolidino-2-hydroxyphenyl )-3-( 2,4-dimethoxy-5-p-chloroanilinophenyl)phthalide. USE:An electron-donative color developer for heat-sensitive recording paper. PREPARATION:The reaction of a compound of formula II such as 2-(4-pyrrolidino-2-hydroxybenzoylbenzoic acid with another compound of formula III is effected in sulfuric acid. |
