5- R -3-(2-吡啶基)-1,2,4-三嗪与芳烃相互作用的研究:逆需求aza-Diels–Alder反应与芳烃介导的多米诺过程†
摘要:
已经研究了取代的5 - R -3-(吡啶基-2)-1,2,4-三嗪与原位生成的取代的芳烃中间体之间的相互作用。根据1,2,5碳原子上两个取代基的性质,反应可提供反需求(ID)的aza-Diels-Alder产品或1,2,4-三嗪环重排(domino)产品作为主要产品。 4-三嗪核或在芳烃部分。根据X射线数据确定了关键产品的结构。基于Diels–Alder过渡态几何的密度泛函理论(DFT)研究,提出了芳烃性质对1,2,4-三嗪转化方向的影响。
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.
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.
Unexpected reduction of the nitro group in (3-nitrophenyl)-1,2,4-triazines during their aza-Diels–Alder reaction with 1-morpholinocyclopentene
作者:Dmitry S. Kopchuk、Albert F. Khasanov、Igor S. Kovalev、Grigory V. Zyryanov、Vladimir L. Rusinov、Oleg N. Chupakhina
DOI:10.1016/j.mencom.2013.07.010
日期:2013.7
Unexpected reduction of the nitro group to the amino one during aza-Diels-Alder reaction between (3-nitrophenyl)-1,2,4-triazines and 1-morpholinocyclopentene (neat, 200 degrees C, argon) occurred to furnish 4-(3-aminophenyl)-6,7-dihydro-5H-cyclopenta[c]pyridines.