Iodine-catalyzed aerobic oxidation of o-alkylazoarenes to 2H-indazoles
作者:Xiangli Yi、Chanjuan Xi
DOI:10.1016/j.tet.2017.01.035
日期:2017.3
An iodine-catalyzed aerobic-oxidative C-H functionalization of o-alkylazoarenes to afford 2H-indazoles has been developed. CuI was found to be an effective additive to accelerate the regeneration of iodine in the catalytic cycle. This catalytic system is suitable for both electron-rich and electron-deficient azoarenes and tolerates a variety of functional groups with high yields. A gram-scale reaction