title: Synthesis of trans-(3S)-amino-(4R)-alkyl- and -(4S)-aryl-piperidines via ring-closing metathesis reaction.
abstract: [reaction: see text] trans-(3S)-Amino piperidines bearing various alkyl and aryl substituents at the C-4 position were synthesized via a ring-closing metathesis reaction. The absolute stereochemistry was controlled using a protected D-serine as a starting material. Stereoselective hydrogenation of allylamines provided trans-(3S)-amino-(4R)-alkyl- and -(4S)-aryl-piperidines. This procedure presents the first method for the asymmetric synthesis of 4-substituted 3-amino piperidines.
authors.affiliation: Procter & Gamble Pharmaceuticals, 8700 Mason-Montgomery Road, Mason, Ohio 45040, USA. hu.xe@pg.com
authors.forename: X Eric
authors.initials: XE
authors.lastname: Hu
authors.forename: Nick K
authors.initials: NK
authors.lastname: Kim
authors.forename: Benoit
authors.initials: B
authors.lastname: Ledoussal