申请人:Beecham Group Limited
公开号:US04258050A1
公开(公告)日:1981-03-24
Compounds of the formula (II): ##STR1## wherein A is a group such that CO.sub.2 A is carboxylic acid, a non-toxic salt thereof or non-toxic ester thereof; R.sub.1 is COR.sub.4 or OR.sub.5 wherein R.sub.4 is lower alkyl, lower alkenyl, lower alkyl aryl or aryl and R.sub.5 is CO.sub.2 R.sub.6, COR.sub.6 or SO.sub.2 R.sub.6 wherein R.sub.6 is lower alkyl, lower alkenyl, lower alkyl aryl or aryl; and R.sub.2 is COR.sub.8 wherein R.sub.8 is lower alkyl, lower alkenyl, lower alkyl aryl or aryl; when R.sub.1 is COR.sub.4 and R.sub.2 is COR.sub.8, R.sub.4 and R.sub.8 are joined so that the N(COR.sub.4) COR.sub.8 moiety is a 5-,6-, or 7-membered heterocyclic ring or said ring to which is fused a phenyl ring unsubstituted or substituted by one or two lower alkyl, lower alkoxyl, fluorine or chlorine; when R.sub.1 is OR.sub.5 and R.sub.2 is COR.sub.8, R.sub.5 and R.sub.8 are joined so that the N(OR.sub.5) COR.sub.8 moiety is a 5-, 6-, or 7-membered heterocyclic ring, are useful for their antibacterial activity and as synergists for penicillins and cephalosporins.
式(II)的化合物:##STR1##其中A是一种基团,使得CO.sub.2 A是羧酸,其非毒性盐或非毒性酯;R.sub.1是COR.sub.4或OR.sub.5,其中R.sub.4是低碳基,低烯基,低碳基芳基或芳基,R.sub.5是CO.sub.2 R.sub.6,COR.sub.6或SO.sub.2 R.sub.6,其中R.sub.6是低碳基,低烯基,低碳基芳基或芳基;R.sub.2是COR.sub.8,其中R.sub.8是低碳基,低烯基,低碳基芳基或芳基;当R.sub.1是COR.sub.4且R.sub.2是COR.sub.8时,R.sub.4和R.sub.8连接在一起,使得N(COR.sub.4)COR.sub.8基团是5、6或7成员杂环环或与之融合的苯环,未取代或取代一个或两个低碳基,低氧基,氟或氯;当R.sub.1是OR.sub.5且R.sub.2是COR.sub.8时,R.sub.5和R.sub.8连接在一起,使得N(OR.sub.5)COR.sub.8基团是5、6或7成员杂环环,对其抗菌活性和作为青霉素和头孢菌素的协同剂具有用处。