Electrochemical oxidation of substituted catechols in the presence of pyrazol-5-ones: characterization of products and reaction mechanism
作者:Xiao-Guang Gao、Cheng-Wen Yang、Zheng-Zheng Zhang、Cheng-Chu Zeng、Xiu-Qing Song、Li-Ming Hu、Ru-Gang Zhong、Yuan-Bin She
DOI:10.1016/j.tet.2010.10.060
日期:2010.12
electrochemical oxidation of substitutedcatechol derivatives has been investigated in the presence of pyrazol-5-ones as C–H acid nucleophiles by using constant current technique in acetate buffer solution. The results indicate that different reaction mechanisms are involved and not only 1,4-Michael adducts but also 1,6-Michael adducts are formed, depending on the nature of the starting catechols and the nucleophiles