Late-Stage N-Alkylation of Azapeptides.
Org Lett
; 24(9): 1768-1773, 2022 03 11.
Article
em En
| MEDLINE
| ID: mdl-35226505
ABSTRACT
Azapeptides undergo on-resin, late-stage N-alkylations to install side chains with high chemoselectivity for the hydrazide nitrogen atoms. The major product is the N1-alkylated "azapeptoid", with only small amounts (<10%) of alkylation occurring at the other aza-amino acid nitrogen (N2). Dialkylations are also possible and afford highly functionalized, disubstituted azapeptides with side chains installed on both aza-amino acid nitrogen atoms. The site-selectivity was determined using Edman degradation, MS/MS sequencing, and comparative LCMS and NMR analyses.
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1
Base de dados:
MEDLINE
Assunto principal:
Compostos Aza
Idioma:
En
Ano de publicação:
2022
Tipo de documento:
Article