m-Terphenyl-3,3″-dioxo-derived oxacalixaromatics: synthesis, structure, and solvent encapsulation in the solid state
作者:Wen-Jing Hu、Long-Qing Liu、Ming-Liang Ma、Xiao-Li Zhao、Yahu A. Liu、Xian-Qiang Mi、Biao Jiang、Ke Wen
DOI:10.1016/j.tet.2013.03.035
日期:2013.5
possible conformations (I, II, III). The cis-conformational terphenyl-3,3″-dioxo (I and II) derived oxacalix[4]aromatics were found to adopt both chair and boat conformations, resulted in creation of molecular cavities capable of hosting solvent molecules of chloroform. The trans-conformational terphenyl-3,3″-dioxo (III) derived oxacalix[4]aromatics, however, adopt a twisted chair conformation with a
oxacalix [2]的合成三联苯基[2]与由5'-的环低聚反应扩大大环孔芳烃叔丁基- (1,1':3',1“ -三联苯)-3,3” -二醇1与描述了缺电子的二卤代苯和氮杂杂环。大环的结构通过NMR,HRMS光谱和X射线衍射技术进行了表征。单晶X射线分析表明,结合在oxacalix [4]芳香族骨架中的三联苯-3,3''-dioxo单元可以采用所有三种可能的构象(I,II,III)。顺式构象三联苯-3,3″-二氧杂(I和II)发现衍生的oxacalix [4]芳香族化合物同时具有椅子和船形结构,从而产生了能够容纳氯仿溶剂分子的分子腔。然而,反式构型的三苯基-3,3''-二氧杂(III)衍生的oxacalix [4]芳香族化合物采用扭曲的椅子构象,具有狭窄的空隙空间,无法容纳任何客体分子。