作者:Gholam H. Hakimelahi、Jih Ru Hwu、Shwu-Chen Tsay、Zahra Ramezani、Jih Ru Hwu
DOI:10.1002/hlca.19960790323
日期:1996.5.8
The cis-configurated isocephem 26 as well as isodethiaoxacephems 21 and 33 were synthesized (Schemes 4 and 5). The key step involves chlorination of the corresponding carbanions of 23, 18, and 31 with CF3SO2Cl followed by internal alkylation. β-Lactams 3, 21, 26, and 33 were found to possess biological activity against several pathogenic microorganisms in vitro. Electronic activation of the lactam
的顺式-构型异头孢烯26以及isodethiaoxacephems 21和33合成(方案4和5)。的关键步骤涉及的相应的碳负离子的氯化23,18,和31与CF 3 SO 2氯随后内部烷基化。β内酰胺3,21,26,和33被发现具有抗几种病原性微生物的生物活性在体外。异噻唑烷酮33中内酰胺部分的电子活化显着增强了其生物活性。