Regioselective ortho-hydroxylation of aryl moiety of 2-arylpyridines using Pd(OAc)2/Oxone in PEG-3400/tert-BuOH

Regioselective ortho-hydroxylation of aryl moiety of 2-arylpyridines was carried out under the influence of Pd(OAc)2/Oxone (potassium peroxymonosulfate) in PEG-3400/t-BuOH in moderate yields.