aConditions I: 1a 1.0 mmol, 2 0.5 mmol, Pd(OAc)2 0.05 mmol, Xantphos 0.1 mmol, Cs2CO3 1 mmol, PhH 0.5 M, 34 W blue LED, rt, 12 h. bPd(OAc)2 (2 mol %) and Xantphos (4 mol %) was added to the reaction mixture after 12 h, and the reaction was stirred for an additional 6 h. cYield for a 1 mmol scale reaction. d1 (0.25 mmol) and 2 (0.5 mmol) were used.