Shaping the cavity of calixarene architecture for molecular recognition: synthesis and conformational properties of new azocalix[4]arenes
作者:Har Mohindra Chawla、Suneel Pratap Singh、Satya Narayan Sahu、Shailesh Upreti
DOI:10.1016/j.tet.2006.05.040
日期:2006.8
A series of new azocalix[4]arenes containing one, two, three, and four free phenolic groups have been synthesized through the reaction of 4-nitro- and 2,4-dinitrophenylhydrazines with flexible calix[4]arene diquinones as well as through diazocoupling reactions of calix[4]arenes. Characterization of synthesized compounds by spectroscopic methods and X-ray diffraction revealed that azocalix[4]arenes
通过4-硝基-和2,4-二硝基苯肼与柔性杯[4]芳烃二醌的反应以及通过4-硝基-和2,4-二硝基苯肼的合成,合成了一系列含有一个,两个,三个和四个游离酚基的新型偶氮杯[4]芳烃。杯[4]芳烃的重氮偶合反应。通过光谱方法和X射线衍射表征合成的化合物表明,如果azocalix [4]芳烃包含至少一个游离酚基,则它们呈圆锥构象。偶氮杯[4]芳烃的部分锥形或1,3-交替构象只有在没有游离酚基的情况下才能产生。结果可用于塑造杯[4]芳烃体系,以实现离子和分子识别。