Arylsilanes: Application to Gold-Catalyzed Oxyarylation of Alkenes
作者:Liam T. Ball、Michael Green、Guy C. Lloyd-Jones、Christopher A. Russell
DOI:10.1021/ol1019162
日期:2010.11.5
Arylsilanes are efficient reagents for the gold-catalyzed oxyarylation of alkenes (21 examples, up to 85% isolated yield). Using commercially available Ph3PAuCl and readily prepared, benign arylsilanes, these two- and three-component reactions proceed smoothly in air. The oxidant, Selectfluor, not only facilitates entry to the Au(I/III) manifold but also provides a fluoride anion for silane activation, thereby avoiding the need for addition of a stoichiometric base.
Gold-Catalyzed Three-Component Coupling: Oxidative Oxyarylation of Alkenes
作者:Asa D. Melhado、William E. Brenzovich、Aaron D. Lackner、F. Dean Toste
DOI:10.1021/ja1034123
日期:2010.7.7
The three-component coupling of terminal alkenes with arylboronic acids and oxygen nucleophiles is described. The reaction employs a binuclear gold(I) bromide as a catalyst and Selectfluor reagent as the stoichiometric oxidant. Alcohols, carboxylic acids, and water can be employed as oxygen nucleophiles, thus providing an efficient entry into B-aryl ethers, esters, and alcohols from alkenes.
Gold-Catalyzed Oxidative Coupling Reactions with Aryltrimethylsilanes
作者:William E. Brenzovich、Jean-François Brazeau、F. Dean Toste
DOI:10.1021/ol102194c
日期:2010.11.5
During continuing studies with a novel oxidative gold oxyarylation reaction, arylsilanes were found to be competent coupling partners, providing further evidence for an intramolecular electrophilic aromatic substitution mechanism. While providing yields complementary to those of the previously described boronic acid methods, the use of trimethylsilanes reduces the observation of homocoupling byproducts