%A Ashwani K. Thakur
%A Raghuvansh Kishore
%O Copyright of this article belongs to Elsevier Science.
%J Tetrahedron Letters
%T An observation of a folded ?-Ala conformation in a model peptide: Boc-L-Pip-?-Ala-NHCH3, X-ray diffraction study
%X An X-ray crystallographic characterization of a ?locally folded? conformation of a ?-Ala residue, in a short linear peptide: Boc-L-Pip-?-Ala-NHCH3, has been described. The critical ? torsion angle between the methylene groups of the ?-Ala adopts a typical gauche (g?) conformation. The urethane moiety is found in the uncommon type a. The influence of the geometrical variation of the Pip residue on ?-Ala conformation has been emphasized.
%N 51
%P 9553-9556
%V 39
%D 1998
%I Elsevier Science/Academic Press
%R doi:10.1016/S0040-4039(98)02122-4
%L open777