【摘要】 通过取代噁二唑硫酮、噻二唑硫酮及三唑硫酮分别和头孢菌素母体７－ＡＣＡ 反应， 制得１４种７－氨基－３－杂环硫亚甲基头孢菌素新母体２ａ—２ｎ， 用１－芳基－５－甲基－１Ｈ－１，２，３－三唑－４－甲酰氯与头孢菌素新母体缩合， 制得２ 种新的７β－（１－芳基－５－甲基－１Ｈ－１，２，３－三唑－４－甲酰胺基）－３－（２－取代１，３，４－噁二唑－５－硫亚甲基）头孢菌素４ｃ， ４ｄ． 新化合物结构经元素分析、ＩＲ、１Ｈ ＮＭＲ及ＦＡＢ－ＭＳ确认． 初步体外抗菌结果表明， 新母体化合物２ 对革兰氏阳性菌有抑制活性且在相同浓度下比７－ＡＣＡ强２０ 倍， 而头孢菌素４ｃ， ４ｄ 对革兰氏阳性和阴性菌都有显著抑制活性更多还原

【Abstract】 Fourteen new mother nucleus of 7 amino 3 heterocyclicthiomethyl cephalosporins 2a₂n were synthesized by the reaction of 7 ACA with 2 substituted 1,3,4 oxadiazol 5 thione 1a₁g, 2 arylamino 1,3,4 thiadiazol 5 thione 1h₁l or 1, 2, 4 triazoline 5 thione 1m, 1n. Two new compounds, 7 （1 aryl 5 methyl 1 H 1,2,3 triazol 4 formylamido） 3 （2 substituted 1,3,4 oxadiazol 5 thiomethyl） cephalosporins 4c, 4d, were obtained by the acylation of 7 amino group of 2c, 2d with 1 aryl 5 methyl 1 H 1,2,3 triazol 4 formyl chloride 3a, 3b. The structures of the compounds synthesized were confirmed by elementary analyses, IR, 1H NMR and FAB MS. In preliminary antibacterial sensitivity test, the compounds 2a₂l were found to show higher antibacterial activity than 7 ACA against Gram positive bacteria, 4c, 4d were found to have significant antibacterial activity against both Gram positive and Gram negative bacteria.更多还原