There is provided an improved method for the production of o-aminophenyl ketones of formula I wherein R is C₃-C₆cycloalkyl or C₁-C₆haloalkyl.
There is also provided an effective method for the preparation of the formula I compound o-aminophenyl cyclopropyl ketone via the dehydrohalogenation of 1-(o-aminophenyl)-4-halo-1-butanone in the presence of a base and a phase transfer catalyst.
Compounds of formula I are key intermediates in the manufacture of sulfamoyl urea herbicides.
提供了一种生产式 I 的邻
氨基苯基酮的改进方法,其中 R 是 C₃-C₆ 环烷基或 C₁-C₆ 卤代烷基。
本发明还提供了一种在碱和相转移催化剂存在下,通过 1-(邻
氨基苯基)-4-卤代-1-
丁酮的脱氢卤化反应制备式 I 化合物邻
氨基
苯基环丙基甲酮的有效方法。
式 I 的化合物是生产
氨基磺酰基
脲除草剂的关键中间体。