Product-selectivity control by the nature of the catalyst: Lewis acid-catalyzed selective formation of ring-fused tetrahydroquinolines and tetrahydroazepines via intramolecular redox reaction
Product-selectivity control by the nature of the catalyst: Lewis acid-catalyzed selective formation of ring-fused tetrahydroquinolines and tetrahydroazepines via intramolecular redox reaction
Enantioselective Gold‐Catalyzed Functionalization of Unreactive sp<sup>3</sup>CH Bonds through a Redox–Neutral Domino Reaction
作者:Guanghua Zhou、Feng Liu、Junliang Zhang
DOI:10.1002/chem.201100019
日期:2011.3.7
Selectivity is golden: The first asymmetric redox–neutraldominoreactioncatalyzed by gold that results in the direct functionalization of unreactive sp3 CHbonds has been reported. This method consists of a heterocyclization/1,5‐hydride transfer/cyclization reaction and provides synthetically valuable azepines with high enantioselectivities and in high yields (Tf=triflate; see scheme).