Synthesis of an [(NHC)<sub>2</sub>Pd(SiMe<sub>3</sub>)<sub>2</sub>] Complex and Catalytic<i>cis</i>-Bis(silyl)ations of Alkynes with Unactivated Disilanes
作者:Melvyn B. Ansell、Debbie E. Roberts、F. Geoffrey N. Cloke、Oscar Navarro、John Spencer
DOI:10.1002/anie.201501764
日期:2015.5.4
The novel complex cis‐[(ITMe)2Pd(SiMe3)2 (ITMe=1,3,4,5‐tetramethylimidazol‐2‐ylidene) has been synthesized by mild oxidative cleavage of Me3SiSiMe3 using [(ITMe)2Pd0]. The use of this complex as precatalyst for the cis‐bis(silyl)ation of alkynes using unactivateddisilanes is reported.
silyl-substituted ethylene dianion dilithiums, [1-phenyl-1,2,2-tris(trimethylsilyl)ethylene]bis[(dimethoxyethane)lithium(I)]} (2) and [1,1-diphenyl-2,2-bis(trimethylsilyl)ethylene][tris(tetrahydrofuran)dilithium(I)] (4), were prepared and characterized by X-ray crystallography as well as NMR spectra. The crystal structures of 2 and 4 revealed interesting structural features. One of the lithium cations was located