Scheme 2. Substrate Scope of Imidazopyridinesa,b,c.
Reaction conditions: 1 (0.2 mmol), NFSI (1.0 equiv), and PIDA (1.0 equiv) in toluene (1 mL) at 60 °C for 15 min.
10 mmol scale.
Reaction with HN(SO2Ph)2 instead of NFSI.
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