Synthesis of 2H-imidazole 1-oxides and stable nitroxyl radicals based on them
摘要:
2H-Imidazole 1-oxides containing an aldonitrone group in the heterocyclic ring are obtained by the condensation of hydroximinomethyl ketones with ketones and ammonium acetate. Their oxidation with lead dioxide in methanol gives stable nitroxyl radicals - 5,5-dimethoxy-3-imidazoline-1-oxyls.
Blue-light-promoted radical C–H azolation of cyclic nitrones enabled by Selectfluor®
作者:Alexey A. Akulov、Mikhail V. Varaksin、Anton N. Tsmokalyuk、Valery N. Charushin、Oleg N. Chupakhin
DOI:10.1039/d1gc00175b
日期:——
An original approach to achieve the C(sp2)–H azolation of cyclic aldonitrones mediated by Selectfluor® has first been employed. By exploiting a metal-free, visible-light-promoted cross-dehydrogenative C–N coupling reaction between model aldonitrones, 2H-imidazole 1-oxides, and NH-containing azoles, a series of novel azaheterocyclic derivatives have been obtained in yields up to 94%. The elaborated
Facile synthesis of 6-aryl-3-pyridyl-1,2,4-triazines as a key step toward highly fluorescent 5-substituted bipyridines and their Zn(II) and Ru(II) complexes
作者:Valery N. Kozhevnikov、Olga V. Shabunina、Dmitry S. Kopchuk、Maria M. Ustinova、Burkhard König、Dmitry N. Kozhevnikov
DOI:10.1016/j.tet.2008.06.040
日期:2008.9
A wide series Of Substituted bipyridines were obtained through the synthesis of 1,2,4-triazines and their aza Diels-Alder reactions. The reported method facilitates the synthesis of functionally diverse bipyridines that provides fine-tuning of photophysical properties of new ligands and their Zn(II) and Ru(II) complexes. Some of substituted bipyridines exhibit 'off-on' fluorescence response toward Zn 2 cations. (C) 2008 Elsevier Ltd. All rights reserved.
Cyclization and rearrangement of substituted glyoxal aldoxime semicarbazones to 6-substituted as-triazine-3,5(2H,4H diones)
作者:Iradj Lalezari
DOI:10.1021/jo01275a065
日期:1968.11
Electronic spectra of asym-triazinyl groups
作者:O. P. Shkurko、L. L. Gogin、S. G. Baram、V. P. Mamaev
DOI:10.1007/bf00663866
日期:1987.2
Campeau, Louis-Charles; Stuart, David R.; Leclerc, Jean-Philippe, Journal of the American Chemical Society, 2009, vol. 131, p. 3291 - 3306
作者:Campeau, Louis-Charles、Stuart, David R.、Leclerc, Jean-Philippe、Bertrand-Laperle, Megan、Villemure, Elisia、et al.