摘要:
Herein Is described the chemoselective Cu(II)-HOBt promoted chemical ligation of glycosylamines and peptide thioacids to give N-glycosylated peptides. The method is distinguished from other chemical approaches to peptide N-glycosylation in that (1) it can be employed In the presence of unprotected N-terminal and Lys side chain amines; (2) it Is remarkably fast, going to completion in under 30 min; and (3) It produces glycopeptides without attendant aspartimide formation.