Scope of 1H-indazol-3-amine^a.

^aReaction conditions: 1 (0.3 mmol, 1.5 equiv.), 2a (0.2 mmol), CuI (0.04 mmol, 20 mol%), CHP (0.8 mmol, 4.0 equiv.), K₂CO₃ (0.4 mmol, 2.0 equiv.) and DMSO (2.0 mL) in a test tube at 40 °C for 18 h.