The development of a new variant of the Friedel-Crafts reaction that yields 3-aryl enol triflates is described. The reaction is practical, is atom-economical, and works well with electron-rich arene substrates.
Mild and Ligand-Free Pd(II)-Catalyzed Conjugate Additions to Hindered γ-Substituted Cyclohexenones
作者:James A. Jordan-Hore、James N. Sanderson、Ai-Lan Lee
DOI:10.1021/ol300794a
日期:2012.5.18
Ligand-free cationic Pd(II) catalyst with NaNO3 as an additive is a highly active catalytic system for conjugate additions to sterically hindered gamma-substituted cyclohexenones. More challenging gamma gamma- and beta gamma-substrates also react well to produce products with quaternary centers in good dr. The conjugate additions occur in a diastereoselective fashion under mild, practical and air-stable conditions, using readily available commercial reagents.