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Conditions: substrate 1 (0.3 mmol), Cu(OAc)2·2H2O (10 mol %), 4,4′-bpy (10 mol %), B2pin2 (1.0 equiv), MeOH (2.0 mL) under a N2 atmosphere at 60 °C for 18 h; Isolated yields. Unless otherwise noted, products E/Z > 20:1.
