Electrochemical oxidation of catechols in the presence of ketene N,O-acetals: indole formation versus α-arylation
作者:Yue-Xia Bai、Da-Wei Ping、R. Daniel Little、Hong-Yu Tian、Li-Ming Hu、Cheng-Chu Zeng
DOI:10.1016/j.tet.2011.09.126
日期:2011.12
Anodic oxidation of catechols has been investigated in the presence of ketene N,O-acetals using cyclic voltammetry and constant current electrolysis methods. The results show that in the presence of ketene N,O-acetals, the anodic oxidation of 4-methylcatechol affords α-arylated products in satisfactory yields. Meanwhile, indoles can be synthesized from simple 3-substituted catechols or catechol itself