One-pot oxidative carbon–carbon bond formation of 3-benzylic and 3-allylic indoles with carbon nucleophiles

Indolenines were generated at −78 °C from 3-benzylic or 3-allylic indoles by dehydrogenation with N-tert-butylbenzenesulfinimidoyl chloride, and a carbon–carbon bond was formed at −78 °C in a one-pot manner by treating these indolenines with various carbon nucleophiles such as active methylene compounds or organocuprates.