7-.alpha. substituted imino 7-.beta. substituted thio cephalosporin
申请人:E. R. Squibb & Sons, Inc.
公开号:US04071682A1
公开(公告)日:1978-01-31
An improved, versatile method for producing 7-cephalosporin derivatives having a 7-alkylthio or 7-arylthio group which comprises treating a 7-substituted imino halide, imino ether or iminothio ether of 7-aminocephalosporanic acid, 7-amino-3-desacetoxycephalosporanic acid and the like with a thiolating agent in the presence of a base, to obtain the thio derivative. These products are particularly useful for conversion to 7.alpha.-alkylthio or 7.alpha.-arylthio-7-acylamino intermediates which are converted to lower alkoxy cephalosporin derivatives useful as antibacterial agents.
一种改进的、多功能的方法,用于制备具有7-烷
硫基或7-芳基
硫基的7-
头孢菌素衍
生物,包括将7-取代的
亚胺卤化物、
亚胺醚或
亚胺硫醚与7-
氨基
头孢菌素酸、7-
氨基-3-去乙酰
氧头孢菌素酸等在碱的存在下与
硫化剂反应,以获得
硫衍
生物。这些产品特别适用于转化为7.alpha.-烷
硫基或7.alpha.-芳基
硫基-7-酰
氨基中间体,这些中间体可转化为有用的抗菌剂的较低烷
氧头孢菌素衍
生物。