Ruthenium-catalyzed oxidative alkyne annulation by C–H activation on ketimines
作者:Jie Li、Lutz Ackermann
DOI:10.1016/j.tet.2013.10.003
日期:2014.5
Carboxylate assistance allowed for ruthenium(II)-catalyzed oxidative alkyne annulations by ketimines under an ambient atmosphere of air. The rutheniumcatalyst outperformed representative rhodium and palladium complexes, and provided versatile access to differently decorated 1-methylene-1,2-dihydroisoquinolines in a highly step- and atom-economical manner. Detailed mechanistic studies provided evidence