In a 12*75 mm Borosilicate glass tube, aryl ethynyl benziodoxolone (0.5 mmol, 2.5 equiv) was added. The tube was then closed with a rubber septum and sealed off with parafilm. Three cycle of evacuate-refill with nitrogen were performed to remove O2 and CHCl3 (2.0 mL, 0.1M) was added, followed by the addition of starting material (0.2 mmol). The reaction mixture was stirred at room temperature with Kessil lamps (440 nm). It should be noted that chloroform can be used from commercially sealed-cap bottle under inert atmosphere or it is recommended to conduct three cycle of Freeze-Pump-Thaw for other sources of chloroform before use. The reaction was monitored by NMR with CH2Br2 as internal standard. Upon completion by either full conversion of starting material or hypervalent iodine reagents, the mixture was concentrated in vacuo and purified by on Biotage (Büchi flashpure cartridge 25 g) to obtained the product.