New [4.4]Cyclophane Diketals, Monoketones, and Diketones: Design, Synthesis, and Structural Analysis
作者:Niculina Bogdan、Ion Grosu、Eric Condamine、Loïc Toupet、Yvan Ramondenc、Ioan Silaghi-Dumitrescu、Gérard Plé、Elena Bogdan
DOI:10.1002/ejoc.200700343
日期:2007.10
The synthesis of some new [4.4]cyclophane diketals, monoketones, and diketones in good yields is reported along with the unusually low reactivity towards hydrolysis of the spiro-1,3-dioxane rings connected to the cyclophane bridges. The structural analysis carried out by X-ray diffraction, NMR spectroscopy, and mass spectrometry shows significant intra- and intermolecular π–π and C–H–π interactions
据报道,一些新的 [4.4] 环烷二缩酮、单酮和二酮以良好的产率合成,同时对连接到环烷桥的螺-1,3-二恶烷环的水解反应异常低。通过 X 射线衍射、核磁共振光谱和质谱进行的结构分析显示出显着的分子内和分子间 π-π 和 C-H-π 相互作用。通过分子建模和变温核磁共振实验研究了芳香环的旋转和桥的翻转。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)