申请人:IMPERIAL CHEMICAL INDUSTRIES PLC
公开号:EP0034413A1
公开(公告)日:1981-08-26
A process forthe preparation of diphenyl ether carboxylic acids of the formula:
wherein W is hydrogen, fluorine, chlorine, bromine, iodine, trifluoromethyl or cyano; X is fluorine, chlorine, bromine, iodine or trifluoromethyl; Y is hydrogen, fluorine, chlorine, bromine, iodine or trifluoromethyl; and Z is hydrogen, fluorine, chlorine, bromine or iodine, which comprises oxidising a tolyl ether compound of the formula:
wherein W, X, Y and Z have the meanings defined above, with molecular oxygen in the presence of a catalyst comprising a heavy metal compound and bromine or a bromine-containing compound.
一种制备式中二苯醚羧酸的工艺:
其中 W 是氢、氟、氯、溴、碘、三氟甲基或氰基;X 是氟、氯、溴、碘或三氟甲基;Y 是氢、氟、氯、溴、碘或三氟甲基;Z 是氢、氟、氯、溴或碘,该工艺包括氧化式中的甲苯醚化合物:
其中 W、X、Y 和 Z 具有上述定义的含义,在由重金属化合物和溴或含溴化合物组成的催化剂存在下,用分子氧进行氧化。