Synthesis of a molecular trefoil knot by folding and closing on an octahedral coordination template
作者:Jun Guo、Paul C. Mayers、Gloria A. Breault、Christopher A. Hunter
DOI:10.1038/nchem.544
日期:2010.3
for the preparation of a molecular trefoil knot from a flexible bipyridine oligomer and a zinc(II) octahedral coordination template. The oligomer folds into a stable open-knot conformation in the presence of the template, and trapping of this arrangement through esterification or ring-closing metathesis produces the closed-knot complex. Subsequent removal of the template from the metathesis product
模板导向合成的出现提供了对一系列新的互锁分子结构的访问。虽然已经报道了许多分子链烷和轮烷的合成,但分子结是一类具有拓扑非平面图的分子,相当罕见。在这里,我们报告了一种从柔性联吡啶低聚物和锌(II)八面体配位模板制备分子三叶结的合成策略。在模板存在的情况下,低聚物折叠成稳定的开结构象,通过酯化或闭环复分解捕获这种排列会产生闭结复合物。随后从复分解产物中去除模板导致分子三叶结。