申请人:Medicam Chemical & Pharmaceutical Co., Ltd.
公开号:EP1211237A1
公开(公告)日:2002-06-05
The present invention relates to a one pot process for the preparation of caffeic acid ester derivatives of the formula I:
wherein
Ar is aryl, which is unsubstituted or substituted with halogen, hydroxy, C1-6 alkyl or C1-6 alkoxy,
A is C1-6 alkylene, C2-6 alkenylene or C2-6 alkynylene,
m is a number from 0 to 6; and
B is C1-6 alkyl or aryl, which is unsubstituted or substituted with halogen, hydroxy, C1-6 alkyl or C1-6 alkoxy;
which process comprises reacting, in a suitable solvent for esterification of a carboxylic acid derivative, a compound of the formula II:
wherein
Ar and A are as defined above.
with a halogenating reagent and alcohol of the formula III:
H-(CH2)m-B III
wherein
m and B are as defined above.
本发明涉及一种制备公式I的咖啡酸酯衍生物的一锅法过程:其中,Ar是芳基,未取代或取代有卤素、羟基、C1-6烷基或C1-6烷氧基;A是C1-6烷基、C2-6烯基或C2-6炔基;m是0到6的数字;B是C1-6烷基或芳基,未取代或取代有卤素、羟基、C1-6烷基或C1-6烷氧基。该过程包括在适合酯化羧酸衍生物的溶剂中,将公式II的化合物与卤代试剂和公式III的醇反应:其中,Ar和A如上所定义,m和B如上所定义。