Oxidative Dehydrogenative Couplings of Pyrazol-5-amines Selectively Forming Azopyrroles
作者:Bo Jiang、Yi Ning、Wei Fan、Shu-Jiang Tu、Guigen Li
DOI:10.1021/jo5004967
日期:2014.5.2
dehydrogenative couplings of pyrazol-5-amines for the selective synthesis of azopyrrole derivatives have been described. The former reaction simultaneously installs C–I and N–N bonds through iodination and oxidation, whereas the latter involved a copper-catalyzed oxidative coupling process. The resulting iodo-substituted azopyrroles were employed by treatment with various terminal alkynes through Sonogashira
Electrosynthesis of azopyrazoles via the oxidation of N -alkylaminopyrazoles on a NiO(OH) anode in aqueous alkali – A green method for N-N homocoupling
作者:Boris V. Lyalin、Vera L. Sigacheva、Vladimir A. Kokorekin、Vladimir A. Petrosyan
DOI:10.1016/j.tetlet.2018.05.089
日期:2018.7
A nickel oxyhydroxide [NiO(OH)] anode was exploited to develop a new synthetic route for the electrocatalytic N-N homocoupling of N-alkylaminopyrazoles in an alkaline aqueous medium. The advantages of this green electrochemical methodology include low cost, atom economy and high yields. (C) 2018 Elsevier Ltd. All rights reserved.
A new synthesis of azopyrazoles by oxidation of C-aminopyrazoles on a NiO(OH) electrode
作者:Boris V. Lyalin、Vera L. Sigacheva、Vladimir A. Kokorekin、Vladimir A. Petrosyan
DOI:10.1016/j.mencom.2015.11.028
日期:2015.11
Oxidation of C-amino-N-alkylpyrazoles on a NiO(OH) electrode in an aqueous alkaline medium affords the corresponding azo-pyrazoles. The success in implementation of these processes is due to the structure of C-aminopyrazoles.