An Original L‐shape, Tunable N‐Heterocyclic Carbene Platform for Efficient Gold(I) Catalysis
作者:Yue Tang、Idir Benaissa、Mathieu Huynh、Laure Vendier、Noël Lugan、Stéphanie Bastin、Philippe Belmont、Vincent César、Véronique Michelet
DOI:10.1002/anie.201901090
日期:2019.6.11
The synthesis and characterization of original NHC ligands based on an imidazo[1,5‐a]pyridin‐3‐ylidene (IPy) scaffold functionalized with a flanking barbituric heterocycle is described as well as their use as tunable ligands for efficient gold‐catalyzed C−N, C−O, and C−C bond formations. High activity, regio‐, chemo‐, and stereoselectivities are obtained for hydroelementation and domino processes,
描述了以侧翼巴比妥杂环为功能的咪唑并[1,5 - a ]吡啶-3-亚烷基(IPy)支架为基础的原始NHC配体的合成和表征,以及它们作为有效金催化C的可调配体的用途。 -N,CO和CC键形成。在加氢元素化和多米诺骨牌工艺中获得了高活性,区域选择性,化学选择性和立体选择性,这突显了这些基于IPy的配体在金催化中的出色性能(TON和TOF)。1,6-烯炔的金催化多米诺反应在温和的条件下以优异的分离产率产生了官能化的杂环。NHC金牌5 Me的效率配合物是显着的,主要是由于配位体1 Me对阳离子Au I活性物质的空间保护和稳定作用的结合。