| 摘要 |
The invention relates to methods of preparing peptide hydrazides useful in as intermediates in preparing derivatized peptides and amenable to conversion to reactive azide comprising species. The invention relates to chemical methods of preparing such species from protected peptide-resins containing the aspartyl or glutamyl residues with orthogonal side-chain carboxylic acid protecting groups ester of Asp and Glu. These esters can be selectively converted to the corresponding side-chain hydrazides useful in various synthetic applications
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