The photocyclisation of 1,2-Ciarylpyridinium cations and the photobiscyclisation of 1,2,6-triarylpyridinium cations
作者:Alan R. Katritzky、Zuriati Zakaria、Edward Lunt
DOI:10.1039/p19800001879
日期:——
Photocyclisation of 1-(2-pyridyl)-2-arylpyridiniums yields benzo[c]pyrido[1,2-a]-1,8-naphthyridinylinium cations. Photobiscyclisation of 1,2,6-triarylpyridiniums gives benzo[8,9]quinolizino[4,5,6,7-fed]phenanthridinylium cations and their 9-aza-derivatives. Electron donor substituents tend to lower the yields which are otherwise high. The structures are supported by X-ray crystallographic analysis
1-(2-吡啶基)-2-芳基吡啶鎓的光环化产生苯并[c]吡啶基[1,2 - a ] -1,8-萘吡啶鎓阳离子。1,2,6-三芳基吡啶鎓的光双环化反应会生成苯并[8,9]喹啉并[4,5,6,7-喂入的]菲啶鎓阳离子及其9-氮杂衍生物。电子给体取代基往往会降低产率,否则产率会很高。该结构通过X射线晶体学分析以及紫外和核磁共振谱来支持。