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Oligosaccharyl Fmoc-asparagine in which amide nitrogen of the asparagine side chain attached to the anomeric position at the reducing end, is a versatile building block and has been used for various glycopeptide synthesis using Fmoc solid-phase peptide synthesis (SPPS). We found unexpected aspartimide formation between amide nitrogen at the reducing end and α-carboxyl acid of oligosaccharyl Fmoc-asparagine...
Described herein is a convenient synthesis of a glycopeptide analogue having an undecasaccharide and its stability towards peptide:N-glycosidase F (PNGase-F). To obtain the glycopeptide analogue, bromoacetamidyl undecasaccharide and undecapeptide containing a cysteine residue were synthesized and then a coupling reaction between haloacetamide and thiol was performed. The coupling reaction progressed...
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