Fig. 4
From: Oxidative [4+2] annulation of styrenes with alkynes under external-oxidant-free conditions
Oxidative D–A reactions of styrene with alkene or arene. Reaction conditions of a 1,1-diphenylethene (0.2 mmol), 2,3-dihydrofuran 8 (1 mmol), Acr+-Mes ClO4− (3 mol%), Co(dmgH)2py2PF6 (8 mol%) in DCE (5 mL), 3W blue LEDs, 24 h. Reaction conditions of b: 1,1-diphenylethene (0.26 mmol), benzofuran 10 (0.2 mmol), Acr+-Mes ClO4− (3 mol%), Co(dmgH)2(4-NMe2py)Cl (10 mol%) in DCE (4 mL), 3W blue LEDs, 24 h
