Table 1.
Reaction conditions: 1 (0.2 mmol), 2 (0.4 mmol), [Rh(C2H4)2Cl]2 (2.5 mol%), dppe (5 mol%), DCE (0.4 mL), 3 h. Isolated yield. Regioselectivity ratio (rr) is the ratio of 6 to 7, which is determined by 1H NMR analysis of reaction mixture. b Using [Rh(cod)Cl]2 (2.5 mol%), Xantphos (5 mol%) and 3,5-dimethylbenzoic acid (50 mol%), 12 h.