Nucleophilic displacement of 7α-methoxy-7β-amino-1-oxacephem derivatives: synthesis of 7α-substituted 1-oxacephem antibiotics
作者:Yuji Sendo、Mitsuru Yoshioka
DOI:10.1039/c39800001069
日期:——
Acid-catalysed displacement of 7α-methoxy-7β-amino-l-oxacephem (1) with nucleophiles gave the 7α-substituted-7β-amino compounds (5–8), which were converted into the antibiotics (13–16).
Synthetic studies on β-lactam antibiotics. Part 10. Synthesis of 7β-[2-carboxy-2-(4-hydroxyphenyl)acetamido]-7.alpha.-methoxy-3-[[(1-methyl-1H-tetrazol-5-yl)thio]methyl]-1-oxa-1-dethia-3-cephem-4-carboxylic acid disodium salt (6059-S) and its related 1-oxacephems