1-Sulpho-2-oxoazetidine derivatives, their production and pharmaceutical compositions thereof
申请人:Takeda Chemical Industries, Ltd.
公开号:EP0021678A1
公开(公告)日:1981-01-07
The invention relates to novel 1-sulpho-2-oxoazetidine derivatives, which are shown by the formula:
wherein R, is amino, acylated amino or protected amino, and X is hydrogen or methoxy, and methods for producing them. The derivatives are of value as medicines in the treatment of bacterial infections or intermediates thereof.
Compounds having one or two substituents at the 3- position, represented by the general formula
wherein R, is an optionally acylated or protected amino group and X is hydrogen atom or methoxy group, or a pharmaceutically acceptable salt thereof; when used either alone or in combination with a β-lactam antibiotic, show excellent β-lactamase inhibitory activity and can be used as drugs for use in humans and domestic animals.
在 3-位上有一个或两个取代基的化合物,由通式表示,其中 R 是可选的酰化或保护氨基,X 是氢原子或甲氧基,或其药学上可接受的盐;当单独使用或与β-内酰胺类抗生素结合使用时,可显示出优异的β-内酰胺酶抑制活性,可用作人类和家畜的药物。
Method of preparing 1-sulfo-2-oxoazetidine derivatives and intermediates therefor
申请人:Takeda Chemical Industries, Ltd.
公开号:EP0053387A1
公开(公告)日:1982-06-09
1-Sulfo-2-oxoazetidine derivatives represented by the formula (I)
wherein R, stands for an amino group which may optionally be acylated or protected, and X stands for hydrogen or methoxy, is produced by subjected a 1-t-butyl or isopropylsilyl derivative of a compound represented by the formula (II)
wherein R2 stands for an amino group which is acylated or protected, and X is of the same meaning as defined above, to sulfonation, followed by, when R2 is a protected amino group, removing the protective group, if necessary.
The compounds represented by the formula (I) have an excellent antibacterial and β-lactamase-inhibitory activity, thus being useful as drugs for humans and domestic animals.
As a key intermediate for the synthesis of sulfazecin derivatives, 3-amino-3-methoxy-2-azetidinone (24 or 26) was synthesized from penicillins, and various new compounds, including sulfazecin, were synthesized by acylation and sulfonation of 24 or 26. Some of these compounds (33, 36) showed higher antibacterial activity than the corresponding 3-demethoxy derivatives against a β-lactamase-producing strain of Escherichia coli.