“…We proposed the possible reaction mechanism based on these observations and the results presented in literature reports (Bag and Maiti, 2016;Gupta et al, 2017;Fu et al, 2018;Toonchue et al, 2018;Wei et al, 2018;Jin et al, 2019;Sekhar Dutta et al, 2019;Shen et al, 2019;Xie et al, 2019a,b;Zheng and Studer, 2019;Meng et al, 2020;Shi and Wei, 2020;Xie et al, 2020;Ali et al, 2021) (Scheme 5). Initially, alkene 2 reacts with sulfate radical anion (generated in situ) to generate the alkyl radical A.…”