Direct Acetoxylation of Arenes

Org Lett. 2021 Nov 5;23(21):8127-8131. doi: 10.1021/acs.orglett.1c02183. Epub 2021 Aug 3.

Abstract

Acetoxylation of arenes is an important reaction and an unmet need in chemistry. We report a metal-free, direct acetoxylation reaction using sodium nitrate under an anhydrous environment of trifluoroacetic acid, acetic acid, and acetic anhydride. Arenes (31 examples), with oxidation potentials (Eox, in V vs SCE) lower than benzene (2.48 V), were acetoxylated with good yields and regioselectivity. A stepwise, single electron-transfer mechanism is proposed.