Coupling Reaction of 2-Hydroxyindoline with Arenes by BF3Et2O. A Convenient Synthetic Method of Isolable Diastereomeric Atropisomers.
作者:Takeo KITAMURA、Kazunobu HARANO、Takuzo HISANO
DOI:10.1248/cpb.40.2255
日期:——
A simple method for synthesis of 2-aryl-substituted 3, 3-dimethylindoline derivatives was established by the reaction of 1-acyl-2-hydroxy-3, 3-dimethylindoline with electron-rich arenes in the presence of boron trifluoride-diethly ether in dioxane. In the reaction with β-naphthol, a pair of isolable diastereomeric atropisomers was isolated. The conformations of both atropisomers were determined by single crystal X-ray analyses. The substitution reaction behavior toward various arenes was accounted for in terms of frontier molecular orbital (FMO) theory.
1-acyl-2-hydroxy-3, 3-dimethylindoline 与富电子烯烃在三氟化硼-二乙醚存在下于二噁烷中反应,建立了合成 2-芳基取代的 3, 3-二甲基吲哚啉衍生物的简单方法。在与β-萘酚的反应中,分离出了一对可分离的非对映异构体。通过单晶 X 射线分析确定了这两种异构体的构象。根据前沿分子轨道(FMO)理论解释了对各种炔烃的取代反应行为。