Easy access to triazoles, triazolopyrimidines, benzimidazoles and imidazoles from imidates
作者:A. Zarguil、S. Boukhris、M.L. El Efrit、A. Souizi、E.M. Essassi
DOI:10.1016/j.tetlet.2008.07.134
日期:2008.10
We have described a new and easy synthesis of triazoles, triazolopyrimidines, benzimidazoles and imidazoles variously substituted based on the reaction of imidates with diamine derivatives. The products were obtained in moderate to good yields. A general mechanism for the reactions is proposed.
Synthesis of 1,2,4-Triazol-3-imines via Selective Stepwise Cycloaddition of Nitrile Imines with Organo-cyanamides
作者:Pallavi Sharma、Shreesha V. Bhat、M. R. Ranga Prabhath、Andrew Molino、Elisa Nauha、David J. D. Wilson、John E. Moses
DOI:10.1021/acs.orglett.8b01673
日期:2018.7.20
A convenient method for the synthesis of 1,2,4-triazol-3-imines through a selective, formal, 1,3-dipolar cycloaddition of organo-cyanamide ions with nitrile imine dipoles is reported. Hydrolysis of the 1,2,4-triazol-3-imines yields the corresponding 1,2,4-triazol-5-ones. A stepwise mechanism, supported by DFT calculations, is invoked to explain the reaction selectivity.
Bipolar Verdazyl Radicals for Symmetrical Batteries: Properties and Stability in All States of Charge
作者:Jelte S. Steen、Folkert de Vries、Johan Hjelm、Edwin Otten
DOI:10.1002/cphc.202200779
日期:2023.2.14
Bipolar organic radicals are promising materials for symmetrical redox-flow batteries. The authors investigate the chemical stability issues that contribute to capacity fade. It is shown that rather than the energized (charged) states, the capacity fade is determined by bimolecular decomposition of the neutral radical.