Deboronative Selenylation, Bromination, or Hydroxylation of Organic Boronic Acids Facilitated by Tetrabutylammonium Tribromide under Transition Metal-Free Conditions

Divergent approaches for the convenient ipso-functionalization of organic boronic acids are presented, capitalizing on tetrabutylammonium tribromide (TBATB) under different, yet transition metal-free conditions. Through these methods, a wide array of organoborons can be efficiently converted into their corresponding selenylated, brominated, or hydroxylated products in moderate to excellent yields. The versatility of this strategy lies in its transition metal-free conditions, simple operation, and step-economic pathways, offering a promising idea for the ipso-functionalization of organoborons