申请人:FBC LIMITED
公开号:EP0031645A2
公开(公告)日:1981-07-08
There is described a process for the production of a compound of formula I,
in which at least one each of Ri, R2 and R3, and of R4, R5 and R6, represents an electron withdrawing group, or one of R1, R2 and R3 together with one of R4, R5 and R6 form a -CO- group, and the remainder of Ri, R2, R3, R4, R5 and R6, which may be the same or different, each represent an electron withdrawing group, alkyl, cycloalkyl, phenyl or phenylalkyl,
or R1 and R2, or R4 and R5, and R1 and R4, may together form a -(CH2)n- chain, in which n is a whole number up to 5,
the alkyl, cycloalkyl, phenyl or phenylalkyl group or the -(CH2)n,- chain optionally being substituted,
which comprises reacting a compound of formula II,
in which Ria, R2a and R3a have the same significances as Ri, R2, and R3 above, and some additional significances,
with a compound of formula III,
in which R4a, R5a and R6a have the same significances as R4, R5 and R6 above, and some additional significances,
the reaction being carried out in an aqueous medium in the presence of a base and a surfactant.
本发明描述了一种生产式 I.化合物的工艺、
其中 Ri、R2 和 R3 以及 R4、R5 和 R6 中至少各有一个代表取电子基团,或 R1、R2 和 R3 中的一个与 R4、R5 和 R6 中的一个共同形成-CO-基团,其余 Ri、R2、R3、R4、R5 和 R6(可以相同或不同)各自代表取电子基团、烷基、环烷基、苯基或苯基烷基、
或 R1 和 R2,或 R4 和 R5,以及 R1 和 R4 可共同形成-(CH2)n-链,其中 n 为不超过 5 的整数、
烷基、环烷基、苯基或苯基烷基或-(CH2)n-链可选择被取代、
其中包括使式 II 的化合物发生反应、
其中 Ria、R2a 和 R3a 具有与上述 Ri、R2 和 R3 相同的意义,以及一些附加意义、
与式 III.化合物
其中 R4a、R5a 和 R6a 具有与上述 R4、R5 和 R6 相同的意义,以及一些附加意义、
反应在有碱和表面活性剂存在的水介质中进行。