作者:Viktor Krchňák、Greg A Slough
DOI:10.1016/j.tetlet.2004.04.105
日期:2004.6
Polymer-supported N-benzyloxy-2-nitrobenzenesulfonamides 1 were N-alkylated using three different routes: via Fukuyama reaction with alcohols, by N-alkylation with alkylbromides, and by Michael addition reaction with alpha, beta-unsaturated carbonyl compounds. The N-alkylated products prepared on the linker 1b were obtained in excellent purity and yield. The 2-nitrobenzenesulfonyl (Nos) group was cleaved under mild conditions to yield polymer-supported N-alkylated benzyloxyamines. Acylation by carboxylic acids and cleavage with TFA yielded N-alkyl hydroxamic acids. (C) 2004 Elsevier Ltd. All rights reserved.