title: A catalytic asymmetric route to carbapenems.
abstract: Efficient syntheses of N-acetyl thienamycin and epithienamycin A in their readily deprotected form are reported where three contiguous stereocenters are established in a single catalytic asymmetric azetidinone-forming reaction. These examples are a template for synthesizing C-5/C-6 cis or trans carbapenems with independent control of the C-8 stereocenter. A library of oxidatively and sterochemically defined azetidinone precursors to a variety of naturally occurring carbapenems and potential biosynthetic intermediates has been prepared to facilitate studies of carbapenem antibiotic biosynthesis.
authors.affiliation: Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, USA.
authors.forename: Micah J
authors.initials: MJ
authors.lastname: Bodner
authors.forename: Ryan M
authors.initials: RM
authors.lastname: Phelan
authors.forename: Craig A
authors.initials: CA
authors.lastname: Townsend
mesh_terms: D000900:Anti-Bacterial Agents / Q000138:chemical synthesis* / Q000737:chemistry; D015780:Carbapenems / Q000138:chemical synthesis* / Q000737:chemistry; D002384:Catalysis; D020650:Combinatorial Chemistry Techniques; D015394:Molecular Structure; D013237:Stereoisomerism
chemical_list: D000900:Anti-Bacterial Agents; D015780:Carbapenems