申请人:Teijin Limited
公开号:US04303664A1
公开(公告)日:1981-12-01
This invention provides novel penicillin derivatives of formula [I]; ##STR1## wherein A is hydrogen or hydroxyl, and B represents the cumarin nucleus of formula [III-a]; ##STR2## in which B.sub.1, B.sub.2, B.sub.3, B.sub.4 and B.sub.5 are same or different, and are hydrogen or substituent groups that may contain nitrogen, sulfur or oxygen atom, or nontoxic salts thereof, and bactericides containing said novel penicillin derivatives or nontoxic salts thereof as the main ingredient, and also an advantageous process for producing said novel penicillin derivatives or nontoxic salts thereof, which comprises reacting a derivative of .alpha.-aminobenzylpenicillin with a coumarincarboxylic acid or reacting 6-aminopencillanic acid, a carboxylic acid salt thereof or a protected derivative thereof having the carboxyl blocked with a readily removable protecting group, with a coumarincarboxylic acid phenylglycinamide.
这项发明提供了式[I]的新型青霉素衍生物;其中A是氢或羟基,B代表式[III-a]的香豆素核;其中B.sub.1、B.sub.2、B.sub.3、B.sub.4和B.sub.5相同或不同,是氢或可能含有氮、硫或氧原子的取代基,或其无毒盐,以及含有所述新型青霉素衍生物或其无毒盐作为主要成分的杀菌剂,还包括一种有利的生产所述新型青霉素衍生物或其无毒盐的方法,该方法包括将α-氨基苯基青霉素衍生物与香豆素羧酸反应或将6-氨基青霉素酸、其羧酸盐或其羧基被易于去除的保护基阻塞的受保护衍生物与香豆素羧酸苯基甘氨酸反应。