1-β-Methylcarbapenem intermediates. Stereoselective synthesis of (3S,4R)-3-[(1R)-1-tert-butyldimethylsilyloxyethyl]-4-[(1R)-3-methoxycarbonyl-1-methyl-2-oxopropyl]azetidin-2-one and its related chemistry
1-β-Methylcarbapenem intermediates. Stereoselective synthesis of (3S,4R)-3-[(1R)-1-tert-butyldimethylsilyloxyethyl]-4-[(1R)-3-methoxycarbonyl-1-methyl-2-oxopropyl]azetidin-2-one and its related chemistry