作者:Fedor I. Zubkov、Vladimir P. Zaytsev、Eugeniya V. Nikitina、Victor N. Khrustalev、Sergey V. Gozun、Ekaterina V. Boltukhina、Alexey V. Varlamov
DOI:10.1016/j.tet.2011.09.099
日期:2011.11
1]heptane moiety. The spatial structure of previously unknown 7,9-epoxycyclopenta[4,5]pyrido[1,2-a]quinolines derived from Wagner–Meerwein rearrangement of 2,11b-epoxyoxireno[6,7]isoindolo[2,1-a]quinolines was established based on the X-ray analysis data. The skeletal rearrangement proceeded regio- and stereospecifically in all the cases examined due to the absence of the epimerization of the carbon atoms
据报道,研究了不同取代或喹啉取代的3a,6; 4,5-二环氧异吲哚-1-酮的骨架Wagner-Meerwein重排。发现最佳反应条件(Ac 2 O,BF 3 ·OEt 2,rt)可形成目标4,6-环氧环戊[ c ]吡啶,产率为40-80%。结果表明,3a,6; 4,5-dipoxyisoindol-1-one的σ重排方向很大程度上取决于氧杂双环[2.2.1]庚烷部分的羧基位置(exo- / endo-)。先前未知的7,9-环氧环戊[4,5]吡啶[1,2- a ]的空间结构基于X射线分析数据,建立了由2,11b-环氧氧杂诺[6,7]异吲哚并[2,1-a]喹啉的Wagner-Meerwein重排衍生的]喹啉。在所有检查的情况下,由于没有与碳正离子化中心相邻的碳原子差向异构化,骨骼的重排在区域和立体上进行。