An efficient protocol has been developed for the direct ortho-hydroxylation of 2- arylbenzothiazole using Pd (OAc) 2 as the catalyst and either of DIB/AcOH or Oxone®/TFA combinations under air atmosphere. Under both these conditions, the methodology tolerates a diverse array of substituents giving good to excellent yields of corresponding ortho- hydroxylated products. Regioselective hydroxylation is observed at the less sterically ...
