Dibenzoylperoxide as a Versatile Oxidant for Oxidative Azidations of Phenols Using Quaternary Ammonium Iodides or Bromides.

Dibenzoylperoxide emerged as a versatile oxidant for quaternary ammonium iodide or bromide-catalyzed reactions of phenol derivatives with NaN3. While the use iodides allowed efficient benzylic azidations under these oxidative conditions, bromides dearomative instead. Both approaches have been successfully applied to different and first proof-of-concept an enantioselective variant using chiral quat. has obtained well.