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Reagents and conditions: (a)191 Pd2(dba)3, P(t-Bu)3·HBF4, K3PO4, THF, 80 °C, 12 h; (b) I2, CHCl3, air, hν (sunlight), 25 °C, 24 h; (c) I2, toluene, air, hν (blue LED), 90 °C, 12 h (flow reactor).
