Preparation and NMR determination of structures of tri-, tetra- and pentacyclic isoindolone derivatives
作者:Pal Sohár、Samuel Frimpong-Manso、Géza Stájer、Gábor Bernáth
DOI:10.1002/mrc.1260321202
日期:1994.12
nol, different tri‐, tetra‐ and pentacyclic phenyl‐substituted norbornane‐condensed heterocycles were prepared. With ethylenediamine, 2 furnished two isomeric imidazolo[2,1‐a]isoindolones. In the formation of one of them, an end→oexo isomerizaton was observed. The stereostructures (configurations and conformations) of the compounds were elucidated by 1H and 13C NMR spectroscopy, with the aid of routine
来自 3-endo-benzoyl-6-exo-phenylbicyclo[2.2.1] 庚烷-2-endo-羧酸 (2) 和 α,ω-二胺或邻氨基苯酚/苯硫酚的反应,不同的三-,四-并制备了五环苯基取代的降冰片烷稠合杂环。与乙二胺一起,2 提供了两种异构的咪唑并[2,1-a]异吲哚酮。在其中之一的形成中,观察到末端→外切异构化。借助常规光谱以及 DR、DNOE、DEPT、COLOC 和 2D-HSC 测量,通过 1H 和 13C NMR 光谱阐明了化合物的立体结构(构型和构象)。