Fig. 3: Scope of other α, β-unsaturated system-containing anilines.
From: Difluorocarbene enables to access 2-fluoroindoles from ortho-vinylanilines

Reaction conditions: a4 (0.2 mmol), 2b (3 equiv., 0.6 mmol), K2CO3 (3 equiv.), H2O (0.1 mL), CH3CN (2 mL) under 90 °C for 12 h, N2. b6 (0.2 mmol), 2a (3 equiv., 0.6 mmol), K3PO4 (3 equiv.), CH3CN (2 mL) under 90 °C for 12 h, N2.