“…Thus, the choice of oxidant is crucial for the reaction conditions. [22] When various oxidants were used, TBHP gave the best results, whereas a,a-dimethylbenzyl hydroperoxide (DTBP), H 2 O 2 (70 wt% in water), benzoyl peroxide (BPO), lauroyl peroxide (LPO), dicumyl peroxide (DCP), CuA C H T U N G T R E N N U N G (OAc) 2 , Ag 2 CO 3 , K 2 S 2 O 8 , and O 2 were all found to be inferior (Table 1, entries 7-15). On the other hand, the use of oxidants such as CuA C H T U N G T R E N N U N G (OAc) 2 and Ag 2 CO 3 was inefficient (Table 1, entries 12 and 13).…”