General Methodology for the Preparation of 2,5-Disubstituted-1,3-oxazoles
作者:David R. Williams、Liangfeng Fu
DOI:10.1021/ol902833p
日期:2010.2.19
Deprotonation of 2-(phenylsulfonyl)-1,3-oxazole (1) readily provides a useful C-5 carbanion that is reactive with a variety of electrophiles. Aldehydes and ketones are useful substrates, and the formation of 5-iodo- and 5-tri-n-butylstannyl oxazoles affords access to cross-coupling reactions. Subsequent nucleophilic displacement of the 2-phenylsulfonyl group provides a general route for the synthesis of 2,5-disubstituted-1