Scheme 2. The substrate scope of aryl boronic acid nucleophiles.^{a a}Reactions were carried out by using (–)-sparteinePdCl₂ (0.03 mmol, 10 mol%), (–)-sparteine (0.06 mmol, 20 mol%), Na₂CO₃ (0.3 mmol, 1 equiv.), 1a (0.3 mmol, 1.0 equiv.), arylboronic acid 2 (0.6 mmol, 2.0 equiv.), and 4-methoxyphenyl iodide 3a (0.9 mmol, 3.0 equiv.) in the mixture of DCM/H₂O/CH₃CN (2 mL : 0.4 mL : 0.2 mL) for 24 h at 100 °C under a N₂ atmosphere. ^bAlkene 1a (0.2 mmol) was used in the reaction. ^cIodobenzene was used as the electrophile; ^dthe reaction was conducted for 48 h and 4.0 equiv. of 3a were used.