An environmentally benign cascade redox process was developed for the efficient construction
of the pharmaceutically significant spirocyclic tetrahydroquinolines via sequential
SNAr/Knoevenagel condensation/[1,5]-hydride transfer/cyclization. This green transformation
has the features of being catalyst-free, additive-free, operationally simple, and
has high step- and atom-economy.
Key words
tetrahydroquinoline - C–H functionalization - cascade reaction - hydride transfer