作者:Ondřej Kundrát、Václav Eigner、Petra Cuřínová、Jan Kroupa、Pavel Lhoták
DOI:10.1016/j.tet.2011.08.062
日期:2011.10
the meta positions at the same side of the molecule. Their reduction and subsequent condensation with arylisocyanates gave the new types of anion receptors with a so far unknown meta-substitution pattern. In a highly HB-competitive solvent like DMSO, the novel ligands showed good complexation abilities. Moreover, as can be documented by higher complexation constants, achiral receptors 9a, 9b are better
25,26,27,28-四丙氧基硫杂杯[4]芳烃(1,3- alternate)的区域选择性硝化导致在分子同一侧的间位形成带有NO 2基团的单硝基和二硝基衍生物。它们的还原和随后与芳基异氰酸酯的缩合产生了迄今未知的间位取代模式的新型阴离子受体。在具有高HB竞争性的溶剂(如DMSO)中,新型配体显示出良好的络合能力。此外,如由较高的络合常数所证明的,非手性受体9a,9b比相应的立体异构体10a,10b更好地预组织了阴离子结合。。我们的结果表明,基于间位取代的硫杂杯形芳烃的阴离子受体具有与普通的对位取代的类似物完全可比的络合能力。