Table 3. Substrate Scope of 4-Quinolones for Chlorination and Bromination Reactions^a.

^aReaction conditions: 4-quinolones (0.2 mmol, 1.0 equiv), KCl/KBr (0.4 mmol, 2.0 equiv), and PIFA (0.22 mmol, 1.1 equiv) in MeOH (2.0 mL) for 0.2–2 h at room temperature, isolated yields.