The redox properties of verdazyl radicals are presented using cyclic voltammetry techniques. These radicals can be reversibly reduced as well as oxidized. Electron-donating and -withdrawing substituents have significant effects on the oxidation and reduction potentials as well as the cell potential (E-cell = |E-ox(degrees) - E-red(degrees)|) for these radicals; a correlation between the electron spin distribution and redox properties is developed.
Efficient Synthesis of Fully Substituted and Diversely Functionalized Pyrazoles through <i>p</i>‐TSA Catalyzed One‐Pot Condensation of Cyclic <i>β</i>‐Diketones, Arylglyoxals and Arylhydrazones
作者:Arun Dhurey、Subhro Mandal、Animesh Pramanik
DOI:10.1002/ejoc.202300770
日期:2023.10.21
An acid catalyzed one-pot condensation of readily available cyclic β-diketones, arylglyoxals and arylhydrazones produces a library of diverselyfunctionalized pyrazole derivatives in excellent yield under metal-catalyst-free benign conditions.
作者:Joe B. Gilroy、Stephen D. J. McKinnon、Bryan D. Koivisto、Robin G. Hicks
DOI:10.1021/ol702163a
日期:2007.11.1
The redox properties of verdazyl radicals are presented using cyclic voltammetry techniques. These radicals can be reversibly reduced as well as oxidized. Electron-donating and -withdrawing substituents have significant effects on the oxidation and reduction potentials as well as the cell potential (E-cell = |E-ox(degrees) - E-red(degrees)|) for these radicals; a correlation between the electron spin distribution and redox properties is developed.
N-Aminations of Benzylamines and Alicyclic Amines with Nitrosoarenes to Hydrazones and Hydrazides
作者:Anisha Purkait、Chandan K. Jana
DOI:10.1055/s-0037-1610701
日期:2019.7
Unlike other alkylamines, benzylamines upon reaction with a nitrosoarene undergo oxidation to the corresponding imines. A direct amination of benzylamines, which was difficult to achieve due to its facile oxidation, to the corresponding hydrazones is reported. A wide variety of benzylamines and N-heterocycles were reacted with nitrosoarenes to provide structurally diverse hydrazones and hydrazides,