Use of Steric Interactions To Control Peptide Turn Geometry. Synthesis of Type VI β-Turn Mimics with 5-<i>tert</i>-Butylproline
作者:Liliane Halab、William D. Lubell
DOI:10.1021/jo990294a
日期:1999.4.1
DMSO, and water by proton NMR spectroscopy. Although the trans-amide isomer was favored in prolyl peptide 2, the Xaa-Pro peptide bond adopted preferably the cis-amide isomer in the case of 5-tert-butylprolyl peptide 1. Measurements of the influence of solvent and temperature on the chemical shift values for the amide proton signals of 1 in the cis-amide conformer indicated that the N'-methylamide was