S<sub>N</sub>2″-Selective and Enantioselective Substitution with Unsaturated Organoboron Compounds and Catalyzed by a Sulfonate-Containing NHC-Cu Complex
作者:Yuebiao Zhou、Ying Shi、Sebastian Torker、Amir H. Hoveyda
DOI:10.1021/jacs.8b10885
日期:2018.12.5
53-89% yield, 69-96% SN2″ selectivity, 98:2 to >98:2 E: Z ratio, and 94:6-98:2 er. Insight regarding several of the unique mechanistic attributes of the catalytic process was obtained on the basis of kinetic isotope effect measurements and DFT studies. These investigations indicate that cationic π-allyl-Cu complexes are likely intermediates, clarifying the role of the s-cis and s-trans conformers of
A consumable anode process permits the electrochemical Heck reaction between aromatic or vinylichalides and acrylate esters using cobalt bromide as catalyst associated with bipyridine as ligand in a mixture of acetonitrile/triethylamine/pyridine as solvent.