Dearomatization of Indoles via Palladium‐Catalyzed Allylic C—H Activation.

The first Pd-catalyzed allylic dearomatization of substituted indoles triggered by C–H bond activation is reported. The presence of a catalytic amount of 2,5-DMBQ is proven to be a key factor for the high yield. This one-pot tandem allylic C–H activation/dearomatization sequence provides a straightforward access to 3,3-disubstituted indolines.