General methods for .alpha.- or .beta.-O-Ser/Thr glycosides and glycopeptides. Solid-phase synthesis of O-glycosyl cyclic enkephalin analogs
作者:Robin Polt、Lajos Szabo、Jennifer Treiberg、Yushun Li、Victor J. Hruby
DOI:10.1021/ja00052a022
日期:1992.12
O-Linked glycopeptides have been efficiently synthesis using the highly nucleophilic α-imino esters (O'Donnell's Schiff bases) derived from L-serine (3a-c), L-threonine (4a,b), and a dipeptide ester (5). General methodology has been developed which can provide β-glycosides of β-hydroxy-α-amino acid derivatives 6-16 in excellent yield (63-94%) and excellent selectivity (>20:1) using Hanessian's modification