申请人:Sumitomo Chemical Company, Limited
公开号:US03933847A1
公开(公告)日:1976-01-20
A coumarin dye of the formula (Ia), ##SPC1## Wherein R.sub.1 is hydrogen, chlorine or C.sub.1 -C.sub.2 alkyl, R.sub.2 and R.sub.3 are hydrogen or C.sub.1 -C.sub.4 alkyl, or a quarternary salt thereof having the formula (Ib), ##SPC2## Wherein R.sub.1, R.sub.2 and R.sub.3 are as defined above, R.sub.4 is C.sub.1 -C.sub.2 alkyl or benzyl, and X.sup.- is an anion, is prepared by an improved method, which comprises reacting a diamine of the formula, ##SPC3## Wherein R.sub.1 is as defined above, with a compound of the formula, X -- CH.sub.2 -- Y wherein X and Y are the same or different and are carboxyl, carbamoyl, alkoxycarbonyl or cyano, in 10 to 70 % sulfuric acid to prepare an imidazolyl acetic acid of the formula, ##SPC4## Wherein R.sub.1 is as defined above, and then reacting the imidazolyl acetic acid with a compound of the formula, ##SPC5## Wherein R.sub.2 and R.sub.3 are as defined above, to obtain the dye (Ia), or further reacting the resulting dye (Ia) with an alkylating agent to obtain the dye (Ib).
化合物(Ia)的
香豆素染料的
化学式为:##
SPC1## 其中,R1为氢、
氯或C1-C2烷基,R2和R3为氢或C1-C4烷基,或者其季
铵盐的
化学式为(Ib):##
SPC2## 其中,R1、R2和R3的定义如上所述,R4为C1-C2烷基或苯甲基,X-为阴离子。该
染料的改进制备方法包括将
化学式为:##
SPC3## 的二胺与
化学式为X-
CH2-Y的化合物反应,其中X和Y相同或不同,分别为
羧酸、
氨甲酰、烷氧羰基或
氰基,在10至70%的
硫酸中制备出
化学式为:##
SPC4## 的
咪唑乙酸,其中R1的定义如上所述,然后将
咪唑乙酸与
化学式为:##
SPC5## 的化合物反应,其中R2和R3的定义如上所述,以得到
染料(Ia),或进一步将所得
染料(Ia)与烷基化试剂反应以得到
染料(Ib)。