申请人:Takeda Chemical Industries, Ltd.
公开号:US04182866A1
公开(公告)日:1980-01-08
Novel cephem compounds having a group of the formula at the 3-position thereof: ##STR1## wherein X represents oxygen, sulfur or imino, which may be substituted; and B represents hydrogen or a hydroxyl, amino, mercapto or hydrocarbon group, which groups may be substituted, can be prepared by reacting a 3-formylcephem compound with a hydrazine compound of the formula: ##STR2## wherein the symbols have the same meanings as above, and subjecting the thus obtained compound to an oxidative ring-closure reaction. The objective compounds are found to have a broad antimicrobial spectrum and, in particular, are effective against gram-negative bacteria including Escherichia Coli, Klebsiella pneumoniae, Proteus vulgaris, Proteus mirabilis, Proteus rettgerii, as well as gram positive ones, and have low-toxity. Thus, these compounds may be used for antimicrobial agents in therapeutical purpose.
新型头孢菌素化合物具有其3位点的一组式:其中X代表氧、硫或亚胺,可以被取代;B代表氢或羟基、氨基、巯基或烃基,这些基团可以被取代,可以通过将3-醛基头孢菌素化合物与一种具有以下式的肼化合物反应,并将所得化合物进行氧化环闭合反应来制备:其中符号的含义与上述相同,并且所得的化合物具有广泛的抗微生物谱,特别对革兰氏阴性细菌包括大肠杆菌、肺炎克雷伯氏杆菌、粪肠杆菌、奇异变形杆菌、雷特格氏变形杆菌等以及革兰氏阳性细菌具有有效性,并且具有低毒性。因此,这些化合物可用于治疗目的中的抗微生物药剂。