作者:Pavel V. Gormay、Victor B. Rybakov、Eugene V. Babaev
DOI:10.1002/ejoc.201000753
日期:——
Cyclopenta[a]quinolizine, a novel tricyclic pseudoazulene, was prepared by reaction of cyclopentadienyllithium with oxazolo[3,2-a]pyridinium or substituted pyridinium salts. Structural analysis (X-ray analysis, NMR and UV spectroscopy) and DFT calculations confirm its highly dipolar nature (due to delocalization of the negative charge around the five-membered ring) combined with partial localization
环戊二烯基锂与恶唑并[3,2-a]吡啶鎓或取代的吡啶鎓盐反应制备了一种新型三环假芘烯,即环戊二烯[a]喹啉。结构分析(X 射线分析、NMR 和 UV 光谱)和 DFT 计算证实了其高度偶极性质(由于五元环周围的负电荷离域)与两个六元环中键的部分定位相结合。