An efficient route to 5-(hetero)aryl-2,4′- and 2,2′-bipyridines through readily available 3-pyridyl-1,2,4-triazines
摘要:
A new route to substituted bipyridines based on a new method for the synthesis of substituted 3-pyridyl-1,2,4-triazines and their aza-Diels-Alder reactions is shown to be an efficient strategy for the preparation of structurally diverse bipyridine ligands. (C) 2005 Elsevier Ltd. All rights reserved.
Tandem oxidation processes for the regioselective preparation of 5-substituted and 6-substituted 1,2,4-triazines
作者:Surat Laphookhieo、Stuart Jones、Steven A. Raw、Yolanda Fernández Sainz、Richard J.K. Taylor
DOI:10.1016/j.tetlet.2006.03.178
日期:2006.6
undergo MnO2-mediated oxidation, followed by in situ trapping with 2-pyridylamidrazone, to give 3-pyridyl-5-substituted 1,2,4-triazines in a one-pot procedure, which avoids the need to isolate the reactive α-ketoaldehyde intermediates. By modifying this procedure to allow condensation prior to oxidation, the corresponding 6-substituted 1,2,4-triazines were obtained. The preparation of a novel unsymmetrical
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.
A rational protocol for the synthesis of 1-(2-pyridyl)isoquinolines
作者:Dmitry S. Kopchuk、Igor S. Kovalev、Albert F. Khasanov、Grigory V. Zyryanov、Pavel A. Slepukhin、Vladimir L. Rusinov、Oleg N. Chupakhin
DOI:10.1016/j.mencom.2013.05.007
日期:2013.5
Aza-Diels-Alder reaction between 3-(2-pyridyl)-1,2,4-triazines and 1-morpholinocyclohexene followed by aromatization of the cyclohexene moiety affords 1-(2-pyridyl)isoquinolines. Crystal structures of two tetrahydroisoquinolines were confirmed by X-ray diffraction analysis.