One-step synthesis of N-protected glycosylamines from sugar hemiacetals
摘要:
Protected pentofuranose, hexofuranose and hexopyranose hemiacetals were found to react efficiently with amines carrying a deactivating group (alkoxycarbonyl, tosyl or phosphoryl group) in the presence of a Lewis acid to give the corresponding, stable glycosylamines. Such glycosylamine derivatives are useful substrates for further elaboration into nitrogen-containing natural products and carbohydrate mimetics. (C) 2007 Elsevier Ltd. All rights reserved.
efficiently synthesized from regular acetyl or methyl glycosides (glucopyranoside, ribofuranoside, arabinofuranoside, and 2-deoxyribofuranoside) and a carbamate by treatment of trimethylsilyl trifluoromethanesulfonate and 4 A molecular sieves. It was found that these N-glycosides underwent Lewis acid catalyzed ring-opening reactions with silylated nucleophiles to give ring-opened amino alcohols with good-to-high
One-step synthesis of N-protected glycosylamines from sugar hemiacetals
作者:Virginie Liautard、Christelle Pillard、Valérie Desvergnes、Olivier R. Martin
DOI:10.1016/j.carres.2007.11.022
日期:2008.8
Protected pentofuranose, hexofuranose and hexopyranose hemiacetals were found to react efficiently with amines carrying a deactivating group (alkoxycarbonyl, tosyl or phosphoryl group) in the presence of a Lewis acid to give the corresponding, stable glycosylamines. Such glycosylamine derivatives are useful substrates for further elaboration into nitrogen-containing natural products and carbohydrate mimetics. (C) 2007 Elsevier Ltd. All rights reserved.