Development of aryl-containing dipyrrolyldiketone difluoroboron complexes (BONEPYs): Tune the hydrogen bond o–C H···F for fluoride recognition
作者:Xin-Dong Jiang、Zhumei Shao、Changliang Sun、Shuai Yue、Rong Shang、Yohsuke Yamamoto
DOI:10.1016/j.cclet.2019.09.053
日期:2020.5
Dipyrrolyldiketone difluoroboron complexes (BONEPYs) were synthesized by condensation of the corresponding pyrroles and malonyl chloride followed by treatment with BF3·OEt2. The aryl-substituted pyrrole is introduced to form a cyclic system in order to investigate anion binding studies. In BONEPYs 1–3 the o-H of the aryl group forms hydrogen bonding with F− to give a more table complex. In contrast, the intramolecular
摘要通过将相应的吡咯与丙二酰氯缩合,再用BF3·OEt2处理,合成了二吡咯基二酮二氟硼配合物(BONEPYs)。引入芳基取代的吡咯以形成环状系统以研究阴离子结合研究。在BONEPY 1-3中,芳基的oH与F-形成氢键,形成更多的表配合物。相反,分子内氢键键合的BONEPY end-4比其exo异构体更稳定。在添加F-时,必须首先断开氢键以得到4·(3)F-。由于富电子基团(-OMe),苯基的oH几乎不能通过氢键与F-相互作用,从而生成不稳定的络合物4·(5)F-。使用DFT方法计算不同构象之间的能量差,