A 13C nuclear magnetic resonance chemical shift study of trans-fused hexopyranoside derivatives
Abstract
A detailed analysis of the 13C n.m.r. spectra of methyl 4,6-O-benzylidene-D-glycopyranosides (and one ethylidene analogue) and their various C-2 and C-3 derivatives has led to complete assignment of chemical shifts. This study has enabled the effects of a variety of stereochemical features and a variety of functional groups (OH, OMe, O·COR, O·SO2R, NH2, N3) to be established.