6-(1-HYDROXYETHYL)-2-(2-AMINOETHYLTHIO)-1,1-DISUBSTITUTED-1-CARBADETHIAPEN-2-EM-3-CARBOXYLIC ACIDS, A PROCESS FOR PREPARING THE SAME, AN ANTIBIOTIC PHARMACEUTICAL COMPOSITION COMPRISING THE SAME, INTERMEDIATES USEFUL IN A SYNTHESIS OF THAT KIND AND PROCESSES FOR PREPARING INTERMEDIATES SUITABLE FOR THE SYNTHESIS OF THAT KIND

摘要

Disclosed are 1-substituted-6-(1-hydroxyethyl)-2-(2-aminoethylthio)-1-carbadethiapen -2-em-3-carboxylic acids (I) and their pharmaceutically acceptable salts and esters which are useful as antibiotics; such compounds are prepared by total synthesis. IMAGE wherein R1 and R2 are, inter alia, substituted and unsubstituted alkyl, aryl, aralkyl, cycloalkyl, cycloalkylalkyl and the spiro substituent formed by the joinder of R1 and R2.