作者:I. Potorocina、M. Vorona、I. Shestakova、I. Domracheva、E. Liepinsh、G. Veinberg
DOI:10.1007/s10593-011-0832-y
日期:2011.9
tert-butyl esters of new cephalosporin and penicillin analogs with an alkylidene substituent in the β-lactam ring. Most of these products were oxidized by meta-chloroperbenzoic acid to the corresponding sulfones. The cephemes and penams synthesized including the oxidized products displayed high cytotoxicity relative to cancer cells in vitro. Some of the alkylidene-substituted cephems as the free acids
3-甲基-7-氧代辛酸-3-em-4-羧酸的叔丁基酯和6-氧代西杨酸与一系列的2-氧代亚烷基(三苯基)正膦酸酯的缩合反应得到了新的头孢菌素和青霉素类似物的叔丁基酯在β-内酰胺环上带有亚烷基取代基。这些产物大多数被间氯过苯甲酸氧化为相应的砜。头孢和戊烯合成包括氧化产物表现出较高的细胞毒性相对于癌细胞在体外。一些亚烷基取代的头孢烯作为游离酸,类似于他唑巴坦,抑制阴沟肠杆菌青霉素酶的催化活性。