Oxidative homocoupling reaction of aryl- or alkynylsilanes was found to proceed without any added activators using a catalytic amount of a palladiumâ1,3-bis(diphenylphosphino)propane complex, affording the corresponding biaryls or 1,3-diynes in modest to excellent yields.
Cross-Coupling Reactions of Aromatic and Heteroaromatic Silanolates with Aromatic and Heteroaromatic Halides
作者:Scott E. Denmark、Russell C. Smith、Wen-Tau T. Chang、Joseck M. Muhuhi
DOI:10.1021/ja8091449
日期:2009.3.4
use of bis(tri-tert-butylphosphine)palladium. Under the optimized conditions, electron-rich, electron-poor, and stericallyhindered arylsilanolates afford cross-coupling products in good yields. Many functional groups are compatible with the coupling conditions such as esters, ketones, acetals, ethers, silyl ethers, and dimethylamino groups. Two particularly challenging substrates, (2-benzofuranyl)dimethylsilanolate