Copper/Titanium Catalysis Forms Fully Substituted Carbon Centers from the Direct Coupling of Acyclic Ketones, Amines, and Alkynes
作者:Conor J. Pierce、Mary Nguyen、Catharine H. Larsen
DOI:10.1002/anie.201206674
日期:2012.12.3
Three‐component coupling, with a pair: The combination of CuII and TiIV catalyzes the first three‐component coupling of unactivated ketones with a diverse range of amines and terminal alkynes. Tetrasubstituted propargylamines are formed under green, solvent‐free conditions (see scheme). This dual metal system overcomes the barrier to ketimine formation and subsequent attack, opening a new path to multicomponent