Step 1: Iodoarene 1 (1.0 equiv), m-CPBA (1.1 equiv) and TsOH•H2O (1.1 equiv) were dissolved in CH2Cl2 [0.2 M] and stirred at rt for 5 min. The flask was then transferred to a preheated oil bath set to 60 °C and the reaction was stirred for 2 h. A white precipitate became visible after 10-20 min. The solvent was evaporated and product 7 was isolated by trituration in Et2O.