Stereoselective Synthesis of a Broad Spectrum 1β-Methylcarbapenem, J-114,870

An ultra-broad spectrum carbapenem, J-114,870 (1), was synthesized from the corresponding C-2 side chain and 1 beta-methyl carbapenem enolphosphate. Synthesis of the C-2 side chain was accomplished by installation of the benzene part to (4R)-hydroxy-2-pyrrolidone 3, affording 2-phenylpyrrolidine 8a, and asymmetric Michael addition of chiral amine to alpha,beta-unsaturated ester derived from 8a. (C) 2000 Elsevier Science Ltd. All rights reserved.