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Reaction conditions: graphite rod anode, platinum plate cathode, constant current = 10 mA, 1 (0.2 mmol), 2 (2 equiv, 0.4 mmol), NH4I (1.5 equiv, 0.3 mmol), DMSO (3 mL), 80 °C. Isolated yield.
DMA (3 mL) as the solvent, 2a (1.5 equiv, 0.3 mmol).
2a (1.2 equiv, 0.24 mmol).
