N-Heterocyclic Carbene Catalyzed Umpolung of Michael Acceptors for Intermolecular Reactions
作者:Akkattu T. Biju、Mohan Padmanaban、Nathalie E. Wurz、Frank Glorius
DOI:10.1002/anie.201103555
日期:2011.8.29
leahciM! The N‐heterocyclic carbene catalyzed umpolung of Michael acceptors proceeds through the formation of a deoxy‐Breslow intermediate (see scheme; EWG=electron‐withdrawing group). This nucleophilic species can react with other Michael acceptors in an intermolecular fashion, thereby resulting in the formation of homo‐ or heterodimeric olefins. This “Michael umpolung” should become a valuable method
漏气!N杂环卡宾催化的Michael受体的化合物通过形成脱氧Breslow中间体进行(参见方案; EWG =吸电子基团)。这种亲核物质可以分子间方式与其他迈克尔受体反应,从而导致形成同二聚或异二聚烯烃。这种“ Michael umpolung”应该成为形成致密官能化烯烃的一种有价值的方法。