Enhancement of Host-Guest Interactions Using Rationally Designed Macrocyclic Boronic Esters with a Naphthalene Core
作者:Yuji Kikuchi、Hiroki Takahagi、Kosuke Ono、Nobuharu Iwasawa
DOI:10.1002/asia.201301577
日期:2014.4
π‐stacking interactions was achieved by using two kinds of macrocyclic boronic esters, 1,4‐naph‐[2+2] and 1,5‐naph‐[2+2], which were easily prepared by self‐assembly of 1,4‐naphthalenediboronic acid (3) or 1,5‐naphthalenediboronic acid (4) and racemic tetrol 1 with an indacene framework in a protic solvent. The X‐ray crystallographic analyses revealed that the tilt angles of the two naphthalene rings are
通过使用两种大环硼酸酯,即1,4-萘[2 + 2]和1,5-萘[2+ ],可以利用π堆积相互作用将电子不足的芳族客体分子有效地包含在有机溶剂中。2],可以通过在质子溶剂中自组装1,4-萘二甲酸(3)或1,5-萘二甲酸(4)和外消旋四氢萘1与吲哚骨架的方法轻松制备。X射线晶体学分析表明,两个萘环的倾斜角不同:1,4-萘[2 + 2]的倾斜角度约为15°,而1,5-萘[2 + 2]的倾斜角度约为15°。大约是0°。由于两个芳香环平行排列,因此1,5-萘酚[2 + 2]的结合能力比1,4-萘酚[2 + 2]高得多。该知识对于有机溶剂中新的宿主分子的设计可能是有用的。