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Malonamidoxa-dethia-cephem compound

阅读:50发布:2023-03-04

专利汇可以提供Malonamidoxa-dethia-cephem compound专利检索,专利查询,专利分析的服务。并且NEW MATERIAL:A 7β-(substituted or unsubstituted malonamido)-7α-methoxy-3- heterocyclic ring thiomethyl-1-oxa-dethia-3-cephem-4-carboxylic acid compound expressed by formula I (R is H, lower alkyl, lower alkenyl, etc.; B
1 and B
2 are H, ester, salt forming atom, etc.; Het is heteromonocyclic group).
USE: An antimicrobial agent of β-lactam, a medicine, a veterinary drug, a germicide and a preventing agent against infection having a powerful antimicrobial action and improved preventing effect on the infection with Gram-negative bacteria, and stable chemically on and maintain a high concentration in blood.
PROCESS: A compound of formula II is acylated with a malonic acid compound of formula III or a reactive derivative thereof, e.g. an acid halide or anhydride, in the presence of a dehydrating and condensing agent for the malonic acid compound or a reaction accelerator, e.g. a base or tertiary amine, for the reactive derivative, in an inert solvent at -20W60°C to give the compound of formula I.
COPYRIGHT: (C)1981,JPO&Japio,下面是Malonamidoxa-dethia-cephem compound专利的具体信息内容。

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