作者:Joseph M. Mahoney、Rameshwer Shukla、R. Andrew Marshall、Alicia M. Beatty、Jaroslav Zajicek、Bradley D. Smith
DOI:10.1021/jo0162787
日期:2002.3.1
templated synthesis of a [2]rotaxane with an acetal-containing axle. The molecular structures of the macrobicycle and the [2]rotaxane were characterized by NMR spectroscopy and X-ray crystallography. The chloride-binding ability of the macrobicycle, either free in solution or when it is part of a [2]rotaxane, is quite weak as determined by NMR titration experiments. A second analogous [2]rotaxane, with
在含乙缩醛的[2]轮烷的模板化合成中,含冠醚的大自行车用作车轮组分。通过NMR光谱和X射线晶体学表征大自行车和[2]轮烷的分子结构。通过NMR滴定实验确定,无论是溶液中游离的还是作为[2]轮烷的一部分,大自行车的氯离子结合能力都非常弱。合成了具有更长轴的第二种类似物[2]轮烷,并通过2D NMR光谱表征了其溶剂依赖性共构象。可以通过溶剂极性控制轮子沿轮轴的位置,但是,尝试使用金属阳离子(例如Na(+),K(+),Ba(2+)和Ag(+))来切换轮子在极性溶剂中的位置不成功。