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Incorporation of urea moiety in the synthesis of C-terminal neoglycopeptides has been demonstrated through the reaction between suitably protected glycosylamine and Fmoc-peptidyl isocyanates or carbamates. Curtius rearrangement has been made use off for the conversion of peptidyl acid azides in to corresponding isocyanates. The resulting C-terminal neoglycopeptidylureas have been isolated as stable...
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