The synthesis of an analog of the carbapenem antibiotics, the asparenomycins, is described. This analog lacks the methyl group in the 6-alkylidene side chain while a methyl group has been placed at the 1-beta-position. The key step involved the Lewis acid-catalyzed rearrangement of an epoxide to an allylic alcohol.
The synthesis of an analog of the carbapenem antibiotics, the asparenomycins, is described. This analog lacks the methyl group in the 6-alkylidene side chain while a methyl group has been placed at the 1-beta-position. The key step involved the Lewis acid-catalyzed rearrangement of an epoxide to an allylic alcohol.
The synthesis and antibacterialactivity of a number of 6-methyl- and 6-propenyl-substituted carbapenems is described. The 6-(hydroxymethyl)- and 6-(aminomethyl)carbapenems possessed more potent antibacterialactivity in vitro than their respective 6-(1'(R)-hydroxyethyl) or 6-(1'(R)-aminoethyl) counterparts. However, because of reduced stability, the 6-(aminomethyl)carbapenem was found to be inactive