申请人:Takeda Chemical Industries, Ltd.
公开号:US03984401A1
公开(公告)日:1976-10-05
A 3-hydroxymethylcephalosporin which is not protected at the carboxyl group can be directly oxidized with a hexavalent chromium compound to give in good yield a lactol type cephalosporin represented by the general formula: ##SPC1## Wherein R.sup.1 is hydrogen or an alkoxy group and R.sup.2 is an acylamino, or imido group. The resulting compounds are very useful and important as intermediates for preparing, e.g. 3-alkoxyiminomethyl cephalosporins.
一种未在羧基处保护的3-羟甲基头孢菌素可以直接与六价铬化合物氧化,得到产率良好的内酯型头孢菌素,其通式表示为:##SPC1## 其中R.sup.1为氢或烷氧基,R.sup.2为酰胺基或亚胺基。所得化合物作为制备3-烷氧肟甲基头孢菌素的中间体非常有用和重要。