Acidic Co-Catalysts in Cationic Gold Catalysis

作者:Barrio, Pablo; Kumar, Manish; Lu, Zhichao; Han, Junbin; Xu, Bo*; Hammond, Gerald B.*
来源:Chemistry - A European Journal, 2016, 22(46): 16410-16414.
DOI:10.1002/chem.201603478

摘要

A systematic study on the effects of Lewis or BrOnsted acid co-catalysts in gold-catalyzed reactions was undertaken using representative reactions (O-, N-, and C-nucleophilic additions to alkynes). Through these reactions, it was demonstrated that an acidic co-catalyst can increase the catalyst turnover significantly, enabling practical reaction rates at competitive catalyst loadings (<1mol%). Further investigation is currently underway to improve the understanding of the subtle principles underlying these experimental observations.