申请人:Eli Lilly and Company
公开号:US04013651A1
公开(公告)日:1977-03-22
7-Amino-(or 7-acylamido)-3-(disubstituted-amino)-3-cephem-4-carboxylic acid esters are prepared with the corresponding 3-chloro-3-cephem ester or 3-alkyl-(or aryl)-sulfonyloxy-3-cephem esters and a secondary amine, e.g., diphenylmethyl 7-[2-(2-thienyl)acetamido] -3-morpholino-3-cephem-4-carboxylate is prepared with the corresponding 3-methyl-sulfonyloxy ester and morpholine. The 3-amino-substituted cephem esters are useful intermediates undergoing reduction with diborane to the corresponding 3H-3-cephem esters, or, alternatively, they are reacted with Grignard reagents, e.g., phenylmagnesium bromide to provide, for example, the 3-phenyl-3-cephem ester.
使用对应的3-氯-3-头孢酯或3-烷基-(或芳基)-磺酸酯和二级胺制备7-氨基-(或7-酰胺基)-3-(二取代氨基)-3-头孢烷-4-羧酸酯,例如,使用对应的3-甲基磺酸酯和吗啡啉制备二苯甲基7-[2-(2-噻吩基)乙酰氨基]-3-吗啡啉-3-头孢烷-4-羧酸酯。这些3-氨基取代的头孢烷酯是有用的中间体,可以通过二硼烷还原为相应的3H-3-头孢烷酯,或者与格氏试剂反应,例如苯基溴化镁,以提供3-苯基-3-头孢烷酯。