Intramolecular 4+2 cycloaddition of thieno[2,3-e][1,2,4]triazines: routes towards condensed thieno[2,3-b]pyridines
作者:Yehia A Ibrahim、Balkis Al-Saleh、Atta Allah A Mahmoud
DOI:10.1016/j.tet.2003.09.031
日期:2003.10
Synthetic approaches towards new condensed thienopyridine ring systems including furo[2,3-b]thieno[3,2-e]pyridines, bisthieno[2,3-b:3′,2′-e]pyridines, 5H-chromeno[2,3-b]thieno[3,2-e]pyridines, 5H-benzo(f)chromeno[2,3-b]thieno[3,2-e]pyridines have been achieved by application of intramolecular 4+2 cycloaddition reactions of suitably designed thieno[2,3-e][1,2,4]triazines tethered with alkene or alkyne
合成新的缩合噻吩并吡啶环系统的方法,包括呋喃[2,3- b ]噻吩并[3,2- e ]吡啶,双铋[2,3- b:3',2'- e ]吡啶,5 H- chromeno [ 2,3- b ]噻吩并[3,2- e ]吡啶,5 H-苯并(f)chromeno [2,3- b ]噻吩并[3,2- e ]吡啶已通过分子内4 + 2的应用获得适当设计的噻吩并[2,3- e ] [1,2,4]三嗪与烯烃或炔烃末端连接的环加成反应。