Toward Fully Synthetic N‐Linked Glycoproteins

Substantial quantities of fully synthetic, homogeneous, N-linked glycopeptides may be accessed by a highly convergent and flexible protocol. Only four transformations are required to generate naturally linked glycopeptides in high yield. Amination of a free glycan is followed by acylation with an asparagine residue of a peptide and Fmoc deprotection; native chemical ligation completes the puzzle to afford N-linked glycopeptides (see scheme). Fmoc=9-fluorenylmethoxycarbonyl.