Fig. 2

Scope of ketonesa. aReaction conditions: 1 (2 equiv.), 2a (0.4 mmol), 3a (1.5 equiv.), Cu(OAc)2 (10 mol%), bpy (10 mol%), TEMPO (3 equiv.), p-TsOH (10 mol%), PhCH3 (1.5 mL), N2, 120 °C for 48 h. Isolated yields

Scope of ketonesa. aReaction conditions: 1 (2 equiv.), 2a (0.4 mmol), 3a (1.5 equiv.), Cu(OAc)2 (10 mol%), bpy (10 mol%), TEMPO (3 equiv.), p-TsOH (10 mol%), PhCH3 (1.5 mL), N2, 120 °C for 48 h. Isolated yields