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    • 1. 发明授权
    • Process for the preparation of aryloxyacetic acid
    • 制备芳氧基乙酸的方法
    • US4238625A
    • 1980-12-09
    • US092783
    • 1979-11-08
    • Helmut FiegeKarlfried Wedemeyer
    • Helmut FiegeKarlfried Wedemeyer
    • C07C59/125B01J23/00B01J27/00B01J31/00C07B61/00C07C51/00C07C51/235C07C51/255C07C59/70C07C65/21C07C67/00C07C201/00C07C205/37C07C51/16
    • C07C51/255C07C51/235
    • In a process for the preparation of an aryloxyacetic acid by oxidation of aryloxyethanol of the formula ##STR1## wherein m represents 1 or 2,n represents the numeral which results from the difference (6-m) andR either individually or independently of one another represent hydrogen, alkyl, cycloalkyl, aryl, aralkyl, alkoxy, cycloalkoxy, aryloxy, hydroxyl, halogen, alkylcarbonyl, arylcarbonyl, carboxyl or nitro, or represent a benzene ring or cycloalkane ring fused to the phenyl ring,with oxygen or an oxygen-containing gas in an aqueous alkaline medium at a temperature from 0.degree. C. to the boiling point of the reaction mixture in the presence of platinum metals and/or palladium metals containing catalyst, the improvement which comprises carrying out the oxidation in the additional presence of an activator of lead and/or bismuth and/or a compound thereof and optionally in the additional presence of Cadmium and/or its compounds.
    • 在通过氧化式(I)的芳氧基乙醇制备芳氧基乙酸的方法中,其中m表示1或2,n表示由差异(6-m)和R单独或独立地产生的数字 代表氢,烷基,环烷基,芳基,芳烷基,烷氧基,环烷氧基,芳氧基,羟基,卤素,烷基羰基,芳基羰基,羧基或硝基,或代表与苯环稠合的苯环或环烷烃环, 含氧气体在含水碱性介质中,在铂金属和/或含钯金属的催化剂存在下,在0℃至该反应混合物的沸点的温度下,其改进包括在额外的 铅和/或铋和/或其化合物的活化剂的存在,并且任选地在镉和/或其化合物的另外存在下。