Sodium Hydroxide (NaOH)‐Mediated Oxidative Hydroxylation of Arylboronic Acids and Its Applications in C‐O Bond Formation

Abstract We have developed a straightforward methodology for converting arylboronic acids into phenols using NaOH‐mediated air oxidation. This reaction offers several advantages, including simple operation, excellent tolerance towards various functional groups, and scalability. The transmetalation of the resulting borate ester with NaOH occurs readily, enabling convenient derivatization of the borate ester into aryl ethers and esters using alkyl and acyl halides.