申请人:Gist-Brocades N.V.
公开号:US04379923A1
公开(公告)日:1983-04-12
A novel process for the preparation of 7-acylamino-3-(thio-substituted)-methyl-3-cephem-4-carboxylic acid 1-oxide derivatives comprising reacting a 7-acylamino-3-bromomethyl-3-cephem-4-carboxylic acid-1-oxide derivative with a silylated thiol of the formula R--S--Si(CH.sub.3).sub.3 I wherein R is an organic group, preferably a 5- or 6-membered heterocyclic group, which reaction is preferably carried out in the presence of an inert organic solvent at a temperature between -20.degree. and 80.degree. C. to obtain the corresponding 7-acylamino-3-(R-thiomethyl)-3-cephem-4-carboxylic acid-1-oxide derivatives, which are valuable intermediates in methods for the preparation of therapeutically active cephalosporins.
一种新颖的制备7-酰胺基-3-(硫取代)-甲基-3-头孢烯-4-羧酸1-氧化物衍生物的方法,包括将7-酰胺基-3-溴甲基-3-头孢烯-4-羧酸-1-氧化物衍生物与具有R--S--Si(CH.sub.3).sub.3 I分子式的硅烷基硫醇反应,其中R是有机基团,最好是5-或6-元杂环基团,该反应最好在惰性有机溶剂存在下,在-20度至80度之间的温度下进行,以获得相应的7-酰胺基-3-(R-硫甲基)-3-头孢烯-4-羧酸-1-氧化物衍生物,这些衍生物是制备治疗活性头孢菌素的有价值中间体。