Product-selectivity control by the nature of the catalyst: Lewis acid-catalyzed selective formation of ring-fused tetrahydroquinolines and tetrahydroazepines via intramolecular redox reaction.
Selective synthesis of ring-fused tetrahydroquinolines and tetrahydroazepines from the same starting materials was achieved by subtle use of the oxophilic Sc(OTf)(3) or carbophilic IPrAuOTf as the catalyst.
Zhou
Guanghua
G
Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, 3663 N. Zhongshan Road, Shanghai 200062, PR China.
Zhang
Junliang
J