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
2-(苯基磺酰基)-1,3-恶唑( 1 )的去质子化容易提供有用的C-5碳负离子,其可与多种亲电子试剂反应。醛和酮是有用的底物,5-碘-和5-三-正-丁基甲锡基恶唑的形成提供了交叉偶联反应的途径。随后 2-苯基磺酰基的亲核置换提供了合成 2,5-二取代-1,3-恶唑的一般途径。