Article ID Journal Published Year Pages File Type
1390455 Carbohydrate Research 2011 9 Pages PDF
Abstract

O-Peracetylated or -perbenzoylated C-(1-bromo-1-deoxy-d-glycopyranosyl)formamides of d-gluco, d-galacto, and d-arabino configuration were reacted with Ag(I)-salts or HgO in nitrile solvents to give N-acyl-1-cyano-d-glycopyranosylamines with an axial C–N bond at the anomeric centre. In the presence of HgBr2, Hg(CN)2, or InCl3 the anomer of the above glycosylamine with an equatorial C–N bond was also isolated or detected. In CH3NO2 solutions as few as 5–10 equiv of the nitrile were sufficient to get acceptable yields for the products. Under similar conditions N-substituted C-(2,3,4,6-tetra-O-acetyl-1-bromo-1-deoxy-β-d-galactopyranosyl)formamides gave anomeric spiro-oxazoline derivatives which, upon mild acidic hydrolysis, opened up to di- and tripeptides of anomeric α-amino acids.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Ritter-type reaction of C-(1-bromo-1-deoxy-D-glycopyranosyl)formamides. ► Synthesis of anomeric α-amino acid derivatives including peptides. ► Preparation of anomeric spiro-oxazoline derivatives.

Keywords
Related Topics
Physical Sciences and Engineering Chemistry Organic Chemistry
Authors
, , , ,