申请人:BEECHAM GROUP PLC
公开号:EP0070103A1
公开(公告)日:1983-01-19
A process for the preparation of a penam derivative of formula (I):
wherein RA is hydrogen or a group of formula (la):
wherein X is -C02R', or S03R'; R is C1-6alkyl, aryl, or heterocyclyl; R' is hydrogen, or a pharmaceutically acceptable salt-forming ion or ester-forming radical, and R2 represents hydrogen or a pharmaceutically acceptable salt-forming ion or in vivo hydrolysable ester-forming radical; which process comprises reacting a compound of formula (II):
wherein RB is hydrogen, a removable amino blocking group, or a group of formula (Ila):
wherein Y is -CO2Rx or -SO3Rx; R is as defined with respect to formula (I) above; Rx represents an ester-forming radical, Ry represents hydrogen, a salt-forming radical or a carboxyl-blocking group, and R3 represents an alkyl, benzyl, or aryl group; with methanol in the presence of copper ions; and thereafter if necessary carrying out one or more of the following steps:
(i) removal of any blocking group;
(ii) converting the product to a pharmaceutically acceptable salt or ester thereof.
一种制备式(I)戊酰胺衍生物的工艺:
其中 RA 是氢或式(la)的基团:
其中 X 是-C02R',或 S03R';R 是 C1-6烷基、芳基或杂环基;R'是氢,或药学上可接受的成盐离子或成酯基,R2 代表氢或药学上可接受的成盐离子或体内可水解的成酯基;该工艺包括使式(II)化合物反应:
其中 RB 是氢、可移除氨基封端基团或式(Ila)基团:
其中 Y 是-CO2Rx 或-SO3Rx;R 如以上式(I)所定义;Rx 代表成酯基,Ry 代表氢、成盐基或羧基封端基团,R3 代表烷基、苄基或芳基;在铜离子存在下与甲醇反应;然后,如有必要,进行以下一个或多个步骤:
(i) 去除任何封端基团;
(ii) 将产物转化为药学上可接受的盐或酯。