Isocyanide based multicomponent reactions of oxazolidines and related systems
作者:Robert W. Waller、Louis J. Diorazio、Brian A. Taylor、William B. Motherwell、Tom D. Sheppard
DOI:10.1016/j.tet.2010.05.083
日期:2010.8
aldehydes/ketones, isocyanides and carboxylic acids. The reaction of oxazolidines without a nitrogen substituent was found to give either the expected Ugi products or the N-acyloxyethylamino acid amides depending on the choice of reaction conditions. Optimised reaction conditions were also developed for the ring-expansion of oxazolidines to morpholin-2-ones via reaction with an isocyanide followed by hydrolysis
Observations on the Reaction of <i>N</i>-Alkyloxazolidines, Isocyanides and Carboxylic Acids: A Novel Three-Component Reaction Leading to <i>N</i>-Acyloxyethylamino Acid Amides
N-Alkyloxazolidines, readily prepared by condensation of the parent carbonyl compounds with β-aminoalcohols, were found to undergo three-component reactions with isocyanides and carboxylic acids to give N-acyloxyethylamino acid derivatives in good yield. The reaction allows the variation of substituents at five different sites in the products through suitable choice of reagents.