CO Extrusion in Homogeneous Gold Catalysis: Reactivity of Gold Acyl Species Generated through Water Addition to Gold Vinylidenes
作者:Janina Bucher、Tim Stößer、Matthias Rudolph、Frank Rominger、A. Stephen K. Hashmi
DOI:10.1002/anie.201409859
日期:2015.1.26
describe a new gold‐catalyzed decarbonylative indene synthesis. Synergistic σ,π‐activation of diyne substrates leads to gold vinylidene intermediates, which upon addition of water are transformed into gold acyl species, a type of organogold compound hitherto only scarcely reported. The latter are shown to undergo extrusion of CO, an elementary step completely unknown for homogeneous gold catalysis. By tuning
在这里,我们描述了一种新的金催化的脱羰茚合成。二炔底物的协同σ,π-活化作用可生成亚乙烯基金中间体,该中间体在加水后可转化为酰基金,这是迄今为止几乎没有报道的一种有机金化合物。后者被证明经历了CO的挤出,这是均相金催化完全未知的基本步骤。通过调节起始二炔系统的电子和位阻性质,可以利用这种新的反应性以高收率合成茚衍生物。