申请人:Sankyo Company Limited
公开号:US04564676A1
公开(公告)日:1986-01-14
A 7-acylamino (or 7-amino)-3-(substituted thiomethyl)cephalosporin derivative or a carboxyl derivative thereof is prepared by heating the corresponding 7-acylamino (or 7-amino)-3-carbamoyloxymethylcephalosporanic acid or a carboxyl derivative thereof with a thiol corresponding to the group which it is desired to introduce at the 3-position under conditions in which the water present is minimized, specifically, either no water is present or the amount of water is limited to less than 5 times the weight of the 7-acylamino (or 7-amino)-3-carbamoyloxymethylcephalosporanic acid or carboxyl derivative thereof. The compounds thus prepared are useful as pharmaceuticals or as intermediates in the production of pharmaceuticals. One of the compounds thus prepared, namely 7.alpha.-methoxy-3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-7.beta.-(O-5-p-ni trobenzoylamino-5-carboxyvaleramido-3-cephem-4-carboxylic acid, is a new compound and it and its salts and esters also form part of the present invention.
通过将相应的7-酰胺基(或7-氨基)-3-(取代硫甲基)头孢菌素衍生物或其羧基衍生物与硫醇在水尽可能少的条件下加热,制备出一种7-酰胺基(或7-氨基)-3-羰基氧甲基头孢菌素酸或其羧基衍生物,具体条件是,要么无水存在,要么水的量限制在7-酰胺基(或7-氨基)-3-羰基氧甲基头孢菌素酸或其羧基衍生物的重量的5倍以下。因此制备的化合物可用作药物或用作制药中间体。其中一种经过这种方法制备的化合物,即7-α-甲氧基-3-(1-甲基-1H-四唑-5-基)硫甲基-7-β-(O-5-对硝基苯甲酰氨基-5-羧基戊酰胺基-3-头孢烯-4-羧酸,是一种新化合物,它及其盐和酯也属于本发明的一部分。