Key Role of Ti(IV) in the Selective Radical−Radical Cross-Coupling Mediated by the Ingold-Fischer Effect
作者:Raffaele Spaccini、Nadia Pastori、Angelo Clerici、Carlo Punta、Ombretta Porta
DOI:10.1021/ja807613q
日期:2008.12.31
We report an innovative approach for the selective synthesis of polyfunctional derivatives by cross-combination of different radicals generated under mild conditions. The coordinating effect of Ti(IV) plays a key role in the reaction mechanism: due to its chelating action on the hydroxyl groups, it promotes the homolytic C-C bond cleavage of alpha,beta-dihydroxy ketones by enhancing the captodative