Stereoselective Synthesis of Vinyl Selenides by Coupling of Vinyl Bromides with Diorgano Diselenides Catalyzed by Copper(I) in [Bmim]BF<sub>4</sub>
作者:Weiliang Bao、Dezhi Chang
DOI:10.1055/s-2006-947320
日期:2006.7
The CuI/L-proline-catalyzed zinc-promoted coupling reaction of vinylbromides with diaryl diselenides or dialkyl diselenides readily occurred at 110 °C in [Bmim]BF 4 to give the corresponding vinyl selenides in good to excellent yields. The recyclable catalyst system offered a convenient, stereoselective and versatile method for the synthesis of vinyl selenides.
Mild, Efficient and Highly Stereoselective Synthesis of (<i>Z</i>)-Vinyl Chalcogenides from Vinyl Bromides Catalyzed by Copper(I) in Ionic Liquids Based on Amino Acids
作者:Weiliang Bao、Zhiming Wang、Hanjie Mo
DOI:10.1055/s-2006-958413
日期:2007.1
A method for the synthesis of(Z)-vinyl chalcogenides by the coupling of vinyl bromides with thiols or diphenyl diselenide using copper(I) salts as catalysts in ionic liquids based on amino acids is reported. The desired vinyl chalcogenides were obtained in good to excellent yields with retention of stereochemistry. The ionic liquids play multiple roles in the reaction: they act as solvent, base, and