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发明授权
US6100263A Phenylacetic acid derivatives, preparation thereof and intermediates therefor, and compositions containing them 失效
苯乙酸衍生物，其制备方法及其中间体，以及含有它们的组合物

Phenylacetic acid derivatives, preparation thereof and intermediates therefor, and compositions containing them
摘要：
Phenylacetic acid derivatives of the formula I ##STR1## where the substituents and the index have the following meanings: X is oxygen or sulfur;R is hydrogen or alkyl;R.sup.1 is hydrogen or alkyl;R.sup.2 is cyano, nitro, trifluoromethyl, halogen, alkyl or alkoxy;m is 0, 1 or 2, it being possible for the R.sup.2 radicals to be different if m is 2;and their salts, processes and intermediates for their preparation, and their use are described.
摘要（中）：

式I的苯乙酸衍生物，其中取代基和指数具有以下含义：X是氧或硫; R是氢或烷基; R1是氢或烷基; R2是氰基，硝基，三氟甲基，卤素，烷基或烷氧基; m为0,1或2，如果m为2，则R2基团可能不同; 并描述了它们的盐，其制备方法和中间体及其用途。

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