申请人:Shionogi & Co., Ltd.
公开号:US04491547A1
公开(公告)日:1985-01-01
Monofluoromethylthioacetic acid (FCH.sub.2 SCH.sub.2 COOH) or difluoromethylthioacetic acid (F.sub.2 CHSCH.sub.2 COOH), or its derivative at the carboxy group can be prepared e.g. by treating a thioglycolic acid ester with monolfuorohalomethane or difluorohalomethane in the presence of a base if required followed by a conventional modification of the produced ester e.g. to make an acid by hydrolysis, a salt by neutralization, a halide with a halogenating agent, and from acid halide or anhydride an ester with an alcohol, or an amide with an amine. These compounds are useful intermediates in the production of medicinal and agricultural chemicals.
单氟甲基硫代乙酸(FCH.sub.2 SCH.sub.2 COOH)或二氟甲基硫代乙酸(F.sub.2 CHSCH.sub.2 COOH),或其羧基衍生物可以通过在碱的存在下用单氟卤代甲烷或二氟卤代甲烷处理巯基乙酸酯而制备,如果需要,随后通过对产生的酯进行常规修饰,例如通过水解制备酸,通过中和制备盐,通过卤化试剂制备卤化物,从酸卤或酐和醇制备酯,或从酸和胺制备酰胺。这些化合物是制备医药和农业化学品的有用中间体。