申请人:Sumitomo Chemical Company, Limited
公开号:EP1067108A2
公开(公告)日:2001-01-10
A process for producing an aryloxyacetic acid of formula (2):
wherein m represents an integer of 1 or 2, n represents an integer from 0 to 4, Ar represents an aromatic hydrocarbon ring, and each R independently represents an alkyl group, a cycloalkyl group, an aryl group, an alkoxy group, a cycloalkoxy group, an aryloxy group, a halogen atom, an alkylcarbonyl group, an arylcarbonyl group, a carboxyl group or a nitro group,
comprising the reaction of an oxygen-containing gas with an aryloxyethanol of formula (1):
(R)n-Ar(̵O-CH2-CH2-OH)m (1)
wherein m, n, Ar, and R are as defined above;
using a catalyst comprising palladium and an indium compound and/or a copper compound, in an aqueous medium and in the presence of 0.5m or more equivalents of alkali per mole of the aryloxyethanol of formula (1); or
using a platinum catalyst, in an aqueous medium and in the absence of alkali or in the presence of less than 0.5m equivalents of alkali per mole of the aryloxyethanol of formula (1).
一种生产式(2)芳氧基乙酸的工艺:
其中 m 代表 1 或 2 的整数,n 代表 0 至 4 的整数,Ar 代表芳香烃环,每个 R 独立地代表烷基、环烷基、芳基、烷氧基、环烷氧基、芳氧基、卤原子、烷基羰基、芳基羰基、羧基或硝基、
包括含氧气体与式 (1) 的芳氧基乙醇反应:
(R)n-Ar(̵O-CH2-CH2-OH)m (1)
其中 m、n、Ar 和 R 如上定义;
在水介质中,在每摩尔式 (1) 芳氧基乙醇含有 0.5m 或更多当量碱的情况下,使用由钯和铟化合物和/或铜化合物组成的催化剂;或
在水介质中,在无碱或每摩尔式(1)的芳氧基乙醇存在少于 0.5m 当量碱的情况下,使用铂催化剂。