Chlorocarboxylation of toluene was achieved by photoirradiation of a chlorine dioxide radical (ClO2˙) under ambient conditions (298 K and 1 atm). 2- and 4-Chlorobenzoic acids were obtained in a 1 : 1 yield ratio. This is a single step synthesis under metal-free and mild conditions.
S. Ohno, H. Asahara, T. Inoue and K. Ohkubo, RSC Adv., 2022, 12, 31412 DOI: 10.1039/D2RA06591F
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