Regioselective ortho-hydroxylation of 2-arylbenzothiazole via substrate directed C–H activation
作者:Arghya Banerjee、Anupam Bera、Srimanta Guin、Saroj Kumar Rout、Bhisma K. Patel
DOI:10.1016/j.tet.2012.12.067
日期:2013.3
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