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One pot lithium-halogen exchange, borylation, and SCM reaction.
(a) 2% precatalyst 13 was used. (b) 1% precatalyst 13 was used. (c) Reaction conditions: ArX (0.375 mmol, 1.5 equiv), THF (0.5 mL), n-BuLi (2.5m in hexanes, 0.41 mmol, 1.7 equiv), B(OiPr)3 (0.41 mmol, 1.7 equiv), −78 °C, 1 h, K3PO4 aq (0.5 m, 1.0 mL), ArX (0.25 mmol, 1.0 equiv), 13 (3 mol %), 2 h, 40 °C. Isolated yields are the average of two runs. (d) 3 equivalents of ArX was used.
