发明授权
US4739047A Intermediates for 2-(1-oxo-3-thiolanyl)-2-penem antibiotics 失效
2-(1-氧代-3-硫杂环戊烷基)-2-青霉烯抗生素中间体

Intermediates for 2-(1-oxo-3-thiolanyl)-2-penem antibiotics
摘要:
Process and intermediates for the conversion of 3R,4R-4-acetoxy-3-[1R-1-(silyloxy)ethyl]-2-azetidinones to antibacterial 5R,6S-6-(1R-1-hydroxyethyl)-2-(1-oxo-3-thiolanylthio)-2-penem-3-carboxylic acids, and the pharmaceutically-acceptable salts and pivaloyloxymethyl esters thereof.
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