The strategy of bridging the anisole units at the upper rim of calix[6]arene has been applied to strain the conformations of calix[6]arene. Based on the selective formylation of the 1,3,5-tri-p-tert-butylcalix[6]arene, several new calix[6]arene derivatives with different 1,3-bridged chains or a 1,3,5-tripod bridge at the upper rim have been prepared with moderate yields. The 1H NMR spectra indicate
在杯[6]芳烃的上缘桥接苯甲醚单元的策略已被应用于应变杯[6]芳烃的构象。基于所述1,3,5-三选择性甲酰化p -叔-butylcalix [6]芳烃,许多新的杯[6]芳烃具有不同的1,3-桥连的链衍生物或1,3,5-三脚架上部轮缘的桥已经准备好,产量中等。的1 1 H NMR谱表明,这些杯[6]芳烃衍生物采取锥形构象,这也证实通过在AM1水平的理论计算。1,3,5-三脚架桥化合物5的X射线晶体结构表明,杯[6]芳烃主体以约C 3 v的圆锥构型站立 对称性,并且甲醇分子被封闭在其疏水腔中并通过多个氢键稳定。