期刊
NATURE CHEMISTRY
卷 2, 期 3, 页码 218-222出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/NCHEM.544
关键词
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资金
- Engineering and Physical Sciences Research Council
- Committee of Vice Chancellors and principals
- AstraZeneca
The advent of template-directed synthesis has provided access to a range of new interlocked molecular architectures. Although many syntheses of molecular catenanes and rotaxanes have been reported, molecular knots are a class of molecules with topologically non-planar graphs that are rather rate. Here we report a synthetic strategy 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 results in a molecular trefoil knot.
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