A Simple Copper Salt-Catalyzed Synthesis of Unsymmetrical Diaryl Selenides and Tellurides from Arylboronic Acids with Diphenyl Diselenide and Ditelluride
作者:Lei Wang、Min Wang、Fuping Huang
DOI:10.1055/s-2005-871936
日期:——
In the presence of a catalytic amount of simple copper salt, the reaction of arylboronic acids with diphenyl diselenide and ditelluride was accomplished without any additive to afford the corresponding unsymmetrical diarylselenides and tellurides in good yields.
copper(I)-catalyzed vinylation of diazo compounds with vinylbenziodoxolone reagents (VBX) as partners is reported. The transformation tolerates diversefunctionalities on both reagents delivering polyfunctionalized vinylated products. The strategy was successfully extended to a three-component/intermolecular version with alcohols. The obtained products contain synthetically versatile functional groups, such
Ligand-controlled reactivity plays an important role in transition-metal catalysis, enabling a vast number of efficient transformations to be discovered and developed. However, a single ligand is generally used to promote all steps of the catalytic cycle (e.g., oxidative addition, reductive elimination), a requirement that makes ligand design challenging and limits its generality, especially in relay
Solventless Suzuki Coupling Reactions On Palladium-Doped Potassium Fluoride Alumina
作者:George W. Kabalka、Lei Wang、Richard M. Pagni、C. Maxwell Hair、Vasudevan Namboodiri
DOI:10.1055/s-2003-36821
日期:——
A solventless Suzuki coupling reaction has been developed which utilizes a commercially available potassiumfluoride alumina mixture and palladium powder. The new reaction is convenient, environmentally friendly, and generates good yields of the coupled products. Aryl iodides react faster than the bromides or chlorides; aryl groups are also more reactive than alkenyl groups. which react faster than
Syntheses of functionally substituted divinylmercury compounds
作者:Rajender S. Varma、Sastry A. Kunda、George W. Kabalka
DOI:10.1016/0022-328x(84)80477-5
日期:1984.9
Reductive disproportionation of vinylmercuric chlorides by alkaline sodium stannite produces divinylmercurials in high yields. The reaction conditions are optimized to obtain functionally substituted divinylmercurials in pure form, free from undesirable side products.