Ascorbic Acid as a Highly Efficient Organocatalyst for <i>ipso</i> ‐Hydroxylation of Arylboronic Acid

Abstract

Abstract An effective organocatalyst, ascorbic acid has been successfully applied for the ipso ‐hydroxylation of arylboronic acid using 30% aqueous H 2 O 2 as oxidant in water at ambient temperature. The methodology proceeds without using any metal catalyst or base and avoids harsh reaction conditions. The protocol is applicable to various electronically diverse arylboronic acid moieties with good to excellent yield.