申请人:Takeda Chemical Industries, Ltd.
公开号:EP0069373A1
公开(公告)日:1983-01-12
A (6R)-substituted-(5R)-penem-3-carboxylic acid derivative having the formula:
wherein R1 and R2 are the same or different and each is a hydrogen atom or a hydrocarbon group, or R1 and R2 taken together represent an alkylene group; R3 is a hydrogen atom or an acyl group; R4 is a hydrogen atom, R5 is an alkyl, alkylthio, heterocycle-thio, alkoxy or heterocycle-oxy group which may optionally be substituted, or R4 and R5 taken together represent a lower alkylene group which may optionally be substituted; and R6 is a hydrogen atom or an ester residue, or a pharmacologically acceptable salt thereof and a method of producing the compound (I) by cyclizing a compound of the formula;
wherein R is an ester residue, Z is a phosphonio or phosphono group and the other groups have the same meanings as defined above, or a salt thereof. And, the compound (I) has strong antibacterial and β-lactamase-inhibiting activities and is of value as drug for animals.
一种(6R)-取代-(5R)-吡喃-3-羧酸衍生物,其式如下
其中 R1 和 R2 相同或不同,且各自为氢原子或烃基,或 R1 和 R2 合在一起代表亚烷基;R3 为氢原子或酰基;R4 是氢原子,R5 是可任选被取代的烷基、烷硫基、杂环硫基、烷氧基或杂环氧基,或 R4 和 R5 合在一起代表可任选被取代的低级亚烷基;以及 R6 是氢原子或酯残基,或其药理学上可接受的盐,以及通过环化式化合物生产化合物 (I) 的方法;
其中 R 是酯残基,Z 是膦酰基或膦酰基,其他基团的含义与上述定义相同,或其盐。而且,化合物(I)具有很强的抗菌和抑制 β-内酰胺酶活性,具有作为动物药物的价值。