T. Nguyen, Catherine Gaulon, T. Chapin
Nov 23, 2006
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Journal
Synlett
Abstract
(N-Vinyl)-1,3-oxazolidin-2-ones,-1,3-oxazolidine-2-thiones and -N'-methylimidazolidin-2-one were conveniently used as new dipolarophiles in thermal 1,3-dipolar cycloaddition involving activated nitrones, and led to new 5-N-substituted isoxazolidines in high yields. A moderate to total trans-diastereoselectivity was observed, increasing with the degree of substitution at C-4.