申请人:Takeda Chemical Industries, Ltd.
公开号:EP0052299A1
公开(公告)日:1982-05-26
2-Oxoazetidine derivatives represented by the formula;
wherein R1 stands for phthalimido group, benzyloxycarbonylamino group, a halogen on an alkyl group which may have hydroxyl group, R2 stands for hydrogen, an alkyl group, an alkylthio group or an arylthio group, and R3 and R4 independently stand for an acyl group or cyano group, and a method of preparing them, which is shown by the following reaction scheme;
wherein R5 stands for a carboxyl-protective group, and R1, R2, R3 and R4 are of the same meanings as defined above.
This compound (I) can be utilized as intermediates for carba-2-penem compounds having excellent anti-bactena activity and β-lactamase inhibitory activity.
2-氧氮杂环丁烷衍生物,由式表示;
其中 R1 代表酞酰亚胺基、苄氧羰基氨基、可带有羟基的烷基上的卤素,R2 代表氢、烷基、烷硫基或芳硫基,R3 和 R4 独立地代表酰基或氰基,其制备方法由以下反应方案所示;
其中 R5 代表羧基保护基团,R1、R2、R3 和 R4 的含义与上述定义相同。
该化合物(I)可用作具有优异抗菌活性和β-内酰胺酶抑制活性的卡巴-2-青霉烯化合物的中间体。