A careful interplay between the π electrophilicity of a cationic AuI center and the basicity of the corresponding counterion allowed for the chemo‐ and regioselective inter‐ as well as intramolecular de‐aromatization of 2,3‐disubstituted indoles with allenamides. The silver‐free bifunctional Lewis acid/Brønsted base complex [2,4‐(tBu)2C6H3O}3PAuTFA] assisted the formation of a range of densely functionalized
阳离子Au I中心的π亲电性和相应抗衡离子的碱性之间存在仔细的相互作用,从而可以利用烯丙酰胺对2,3-二取代的吲哚进行化学和区域选择性相互作用以及分子内脱芳香化作用。无银双官能路易斯酸/布朗斯台德碱络合物[2,4-(t Bu)2 C 6 H 3 O} 3 PAuTFA]在温和条件下协助形成了一系列密集官能化的吲哚胺。
Catalytic metal-free Si–N cross-dehydrocoupling
作者:Lutz Greb、Sergej Tamke、Jan Paradies
DOI:10.1039/c3cc49558b
日期:——
The B(C6F5)3 catalyzed cross-dehydrocoupling of hydrosilanes with anilines, carbazoles and indoles is reported and provides a metal-free access to silyl-protected amines.