Silver-Free Activation of Ligated Gold(I) Chlorides: The Use of [Me<sub>3</sub>NB<sub>12</sub>Cl<sub>11</sub>]<sup>−</sup>as a Weakly Coordinating Anion in Homogeneous Gold Catalysis
作者:Michael Wegener、Florian Huber、Christoph Bolli、Carsten Jenne、Stefan F. Kirsch
DOI:10.1002/chem.201404487
日期:2015.1.12
Phosphane and N‐heterocycliccarbene ligated gold(I) chlorides can be effectively activated by Na[Me3NB12Cl11] (1) under silver‐free conditions. This activation method with a weakly coordinating closo‐dodecaborate anion was shown to be suitable for a large variety of reactions known to be catalyzed by homogeneous gold species, ranging from carbocyclizations to heterocyclizations. Additionally, the
在无银条件下,Na [Me 3 NB 12 Cl 11 ](1)可以有效活化磷化氢和N-杂环卡宾相连的氯化金(I)。这种具有弱配位的活化方法闭合碳-dodecaborate阴离子被证明是适合于大量的各种已知由均匀的金物种催化的反应,从carbocyclizations到heterocyclizations的。此外,还证明了1在以前未知的5-甲硅烷氧基-1,6-炔烃转化中的能力。
Exclusive 1,2-Aryl Shift in Platinum(II) Chloride-Catalyzed Cyclization of 1-(Indol-2-yl)-2,3-allenols
作者:Wangqing Kong、Youai Qiu、Xue Zhang、Chunling Fu、Shengming Ma
DOI:10.1002/adsc.201100935
日期:2012.8.13
An efficient cyclization of 1-(indole-2-yl)-2,3-allenols in the presence of platinum(II) chloride leading to polysubstituted carbazoles via 1,2-methyl or an exclusive1,2-aryl migration of the metal-carbene intermediate was observed. The reaction proceeds via the intermediacy of a metal carbene intermediate, which induces the carbon-carbon bond cleavage via 1,2-migration to afford the products.