Improved Synthesis of Aryltriethoxysilanes via Palladium(0)-Catalyzed Silylation of Aryl Iodides and Bromides with Triethoxysilane
作者:Amy S. Manoso、Philip DeShong
DOI:10.1021/jo010621q
日期:2001.11.1
silylation of aryl halides with triethoxysilane has been expanded to include aryl bromides. A more general Pd(0) catalyst/ligand system has been developed that activates bromides and iodides: palladium(0) dibenzylideneacetone (Pd(dba)(2)) is activated with 2-(di-tert-butylphosphino)biphenyl (Buchwald's ligand) (1:2 mol ratio of Pd/phosphine). Electron-rich para- and meta-substituted aryl halides (including
Nucleophilic disulfurating reagents for unsymmetrical disulfides construction via copper-catalyzed oxidative cross coupling
作者:Zhihong Dai、Xiao Xiao、Xuefeng Jiang
DOI:10.1016/j.tet.2017.05.010
日期:2017.6
disulfurating reagent and arylsilane introducing two sulfur atoms in one step. This methodology was applied to synthesize various unsymmetrical disulfides under mild conditions via copper-catalyzed oxidative Hiyama-type cross coupling, providing a new pathway for disulfidesynthesis. In addition, pH value of system displayed a key role in alcoholysis process.