MELLOMPRODUKTER FOR FREMSTILLING AV 5R,65-6-(1R-1-HYDROKSYETYL)-2-(1-OKSO-3-TIOLANYLTIO-2-PENEM-3-KARBOKSYLSYRER OGFREMGANGSMAATE FOR FREMSTILLING AV MELLOMPRODUKTENE.

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-pen em-3-carboxylic acids, and the pharmaceutically-acceptable salts and pivaloyloxymethyl esters thereof.