Diastereomeric 5R,6S-6-(1R-hydroxyethyl)-2-(1S-oxo-3R-thiolanylthio)-2-penem-3-carboxylic acid and 5R,6S-6-(1R-hydroxyethyl)-2-(1R-oxo-3S-thiolanylthio )-2-penem-3-carboxylic acid, and pharmaceutically-acceptable salts and in vivo hydrolyzable esters thereof, useful as systemic antibacterial agents; and intermediates and processes which are useful in the said synthesis of said diastereoisomers.
对映异构体 5R,6S-6-(1R-羟基乙基)-2-(1S-氧代-3R-巯基丙基
硫代)-2-氧杂-3-
羧酸和 5R,6S-6-(1R-羟基乙基)-2-(1R-氧代-3S-巯基丙基
硫代)-2-氧杂-3-
羧酸,以及它们的药用可接受盐和体内可
水解酯,作为全身用抗菌剂是有用的;以及用于所述对映异构体合成的中间体和过程。