N-Heterocyclic Carbene Catalyzed Cyclization Cascades of 3-Halopropenals and Arylnitroso Compounds to 2,3-Disubstituted Isoxazol-5(2H)-ones
作者:Cheng Ma、Weijun Yao、Ming Bian、Gang Wang
DOI:10.1055/s-0030-1260037
日期:2011.6
An NHC-catalyzed annulation reaction of 3-halopropenals with nitrosobenzene derivatives, providing access to 2,3-disubstituted isoxazol-5(2H)-ones under mild conditions is described. This procedure represents a metal-free approach to the alternative equivalent of β-acylvinyl anions for the formation of heterocyclic compounds.
本文描述了一种 NHC 催化的 3-卤代丙烯醛与亚硝基苯衍生物的环化反应,在温和的条件下生成 2,3-二取代的异噁唑-5(2H)-酮。该过程代表了一种无金属方法,可替代δ-乙烯基阴离子形成杂环化合物。