Abstract
Using the Boc-strategy, a step-by-step synthesis on the PAM solid supportof three aza-, iminoaza- and reduced aza-peptide homologues is described.From the same hydrazinocarbonyl peptide-PAM precursor, the coupling ofeither a Boc-amino acid or a Boc-amino aldehyde gives rise to an aza-peptideor an iminoaza-peptide containing theCα-CO-NH-Nα-CO-NH-Cα orCα-CH=N-Nα-CO-NH-Cα surrogate of the peptide motif, respectively. In situreduction of the latter by NaBH3CN leads to a reducedaza-peptide containing theCα-CH2-NH-Nα-CO-NH-Cα moiety. The key step synthesis of thehydrazinocarbonyl peptide-PAM precursor is carried out by coupling on thegrowing peptide chain the N-Boc-aza-amino acid chloride obtained by theaction of triphosgene on the corresponding N-Boc-hydrazine. Thesemodifications have been introduced in position 1-2 of the YLGYLEQLLRbenzodiazepine-like decapeptide
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Frochot, C., Vanderesse, R., Driou, A. et al. A solid-phase synthesis of three aza-, iminoaza- and reduced aza-peptides from the same precursor. Letters in Peptide Science 4, 219–225 (1997). https://doi.org/10.1023/A:1008826901053
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DOI: https://doi.org/10.1023/A:1008826901053