Catalytic hydrogenation of vinylogous peptides: a route towards γ-peptide foldamers
作者:Claude Grison、Stéphane Genève、Stéphanie Claudel、Philippe Coutrot、Michel Marraud
DOI:10.1016/s0040-4039(03)00272-7
日期:2003.3
Catalytic hydrogenation over Pd/C of vinylogous aminoacids and aminoamides has been studied. The configuration of the ethylenic bond has an important effect on the diastereoselectivity. The higher selectivity is observed with the E-vinylogous aminoamides. The conformational preferences of the alpha,gamma-disubstituted gamma-peptides have been determined. The 2S,4S-gamma-peptide moiety induces a beta-like folded structure stabilized by an intramolecular hydrogen bond, whereas the 2S,4R-diastereomer assumes an open structure. (C) 2003 Elsevier Science Ltd. All rights reserved.