Although general gram-positive activity was comparable to cephalothin in many cases, against penicillin G resistant Staphylococcus aureus, the new cephalosporins were of low effectiveness. The 3-(substituted)vinyl cephalosporins had good activity against a number of gram-negative organisms. In some cases, this activity was excellent. The N-acetyl analogs had surprisingly good activity relative to N-acetyl-7-ACA
3-(取代的)
乙烯基头孢烯核是通过3-甲酰基头孢烯衍
生物与稳定的膦烷反应制备的。适当的合成步骤使得可以制备一系列带有多种7-酰基
氨基官能团的3-乙氧基羰基
乙烯基-和3-羧基
乙烯基-
乙烯醚衍
生物。还制备了3-
氰基
乙烯基头孢烯核的苯氧基乙酰基和
噻吩乙酰基衍
生物。尽管在许多情况下,一般的革兰氏阳性活性与
头孢菌素相当,但针对耐
青霉素G的
金黄色葡萄球菌,新的
头孢菌素疗效低下。3-(取代)
乙烯基头孢菌素对许多革兰氏阴性
生物具有良好的活性。在某些情况下,这种活动非常好。相对于N-乙酰基-
7-ACA,N-乙酰基类似物具有令人惊讶的良好活性。