Fluorinated Calix[4]pyrrole and Dipyrrolylquinoxaline: Neutral Anion Receptors with Augmented Affinities and Enhanced Selectivities
作者:Pavel Anzenbacher,、Andrew C. Try、Hidekazu Miyaji、Karolina Jursíková、Vincent M. Lynch、Manuel Marquez、Jonathan L. Sessler
DOI:10.1021/ja002112w
日期:2000.10.1
The use of the 3,4-difluoro-1H-pyrrole as a building block for the preparation of octamethyloctafluorocalix[4]pyrrole and 2,3-di(3‘,4‘-difluoropyrrol-2‘yl)quinoxaline is described. These latter two entities act as neutral anion receptors and were found to bind anions such as fluoride, chloride, or dihydrogen phosphate with an enhanced affinity compared to their non-fluorinated congeners as judged from
描述了 3,4-二氟-1H-吡咯作为用于制备八甲基八氟杯[4]吡咯和2,3-二(3',4'-二氟吡咯-2'基)喹喔啉的结构单元的用途。根据 1H NMR、19F NMR 和荧光发射光谱分析判断,后两种实体充当中性阴离子受体,并且与它们的非氟化同类物相比,它们以增强的亲和力结合诸如氟化物、氯化物或磷酸二氢盐之类的阴离子。在氯化物和磷酸二氢阴离子的情况下,亲和力的增加特别高,特别是 2,3-二(3',4'-二氟吡咯-2'-基)喹喔啉系统,尤其显示出对 H2PO4 的亲和力-与其非氟化同类物相比提高了 3 个数量级。这种对磷酸二氢盐亲和力的提高伴随着颜色从浅黄色变为橙色,从而允许使用此类化合物作为磷酸盐阴离子的肉眼传感器。在八氟杯[4]吡咯的情况下...