Table 4. Substrate scope of aryl boronic acid a .
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aReaction conditions: 1a (0.2 mmol, 1 equiv.), 2a (0.3 mmol, 1.5 equiv.), 3 (0.6 mmol, 3 equiv.), Cu(CH3CN)4BF4 (5 mol%), ligand (7 mol%), DIPEA (0.6 mmol, 3 equiv.), THF (1 mL), rt.
bReaction conditions: 1a (0.2 mmol, 1 equiv.), 2a (0.3 mmol, 1.5 equiv.), 3 (0.6 mmol, 3 equiv.), Cu(CH3CN)4BF4 (5 mol%), ligand (7 mol%), DMF (1 mL), THF (1 mL), rt.