Fig. 5: Reaction scope of N-tosylhydrazones 2 and imines 5 for the synthesis of tetrahydrocarbolines 6.

a Scope of N-tosylhydrazones. b Scope of imines. Me: methyl, Ts: 4-methylbenzenesulfonyl.
a Scope of N-tosylhydrazones. b Scope of imines. Me: methyl, Ts: 4-methylbenzenesulfonyl.