Transformations of penicillins: reactions of penam S-oxides with N-chloro-N-sodiocarbamates
作者:David H. Bremner、Malcolm M. Campbell、Graham Johnson
DOI:10.1039/p19770001943
日期:——
Penicillanate (S)-S-oxides reacted with ethyl N-chloro-N-sodiocarbamate to give 6α-ethoxyformamido-derivatives together with the corresponding 6-epi-penicillanate, an intermediate in the formation of the former product. The (R)-S-oxides reacted with N-chloro-N-sodiocarbamate to give 6α-alkoxyformamido-derivatives, together with 6,6-bis(alkoxyformamido)penam (R)-S-oxides, which were further transformed
青霉酸酯(S)-S-氧化物与N-氯-N-磺基氨基甲酸酯乙酯反应,生成6α-乙氧基甲酰胺基衍生物以及相应的6-表-青霉酸酯,这是前一种产物形成过程中的中间体。的([R )-小号-oxides与反应Ñ氯代Ñ -sodiocarbamate得到6α-alkoxyformamido衍生物,连同6,6-双(alkoxyformamido)青霉烷([R )-小号-oxides,将其进一步转化成cephalosporanates 。讨论了这些取代反应的机理。