Mild Rhodium(III)-Catalyzed CH Activation and Intermolecular Annulation with Allenes
作者:Honggen Wang、Frank Glorius
DOI:10.1002/anie.201201273
日期:2012.7.16
All(enes) great! A novel RhIII‐catalyzed oxidative coupling with allenes under mild conditions provides heterocycles with exocyclic double bonds. This reaction features low catalyst loadings, high regio‐ and stereoselectivity, and excellent substrate scope. The products were derivatized and preliminary mechanistic studies were conducted.
An efficient C-H/N-H functionalization with allenes was enabled via versatile electro-oxidative cobaltcatalysis. Thus, electrochemicalC-H activations were accomplished with high levels of chemoselectivity and regioselectivity in an operationally simple undivided cell setup. The user-friendly nature of this protocol was highlighted by excellent functional group tolerance, an electro-reductive removable