A chiral [2]rotaxane in which the asymmetry is derived from the way in which the two components are mechanically interlocked — rather than being encoded in the covalent connectivity of the components themselves — has been shown to act as an enantioselective organocatalyst.
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Goldup, S. A chiral catalyst with a ring to it. Nature Chem 8, 404–406 (2016). https://doi.org/10.1038/nchem.2509
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DOI: https://doi.org/10.1038/nchem.2509
