Organocatalytic Intramolecular 1,5-Hydride Transfer-Ring-Closure Cascade

Significance

An organocatalytic enantioselective intramolecular redox reaction, consisting of a 1,5-hydride transfer followed by 6-endo cyclization has been developed. Secondary amines 1 were indentified as efficient catalysts for the redox cyclization of cinnamaldehyde derivatives 2 to give tetrahydroquinolines 3 with high enantioselectivity in moderate yields.