Variation of directing groups on the benzamides for the iridium-catalyzed amidation with tosyl azide (2a) as amino sourcea.
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Reaction conditions: N-substituted benzamide 4a–4f (0.40 mmol, 1.0 equiv.), tosyl azide 2a (0.60 mmol, 1.5 equiv.), [IrCp*Cl2]2 (5.0 mol%), AgNTf2 (20 mol%), in [BMIM]PF6 (0.60 mL, 0.67 M) as reaction medium at 40 °C for 8 h in the open air, isolated yield reported after purification by flash column chromatography on silica gel.
ND = not detected.