Macrocyclic hosts are prepared in 80–90% yields by using intramolecular hydrogen-bonding interactions to direct the cyclisation; in the absence of such effects, intermolecular hydrogen-bonding interactions template the formation of catenanes.
F. J. Carver, C. A. Hunter and R. J. Shannon, J. Chem. Soc., Chem. Commun., 1994, 1277 DOI: 10.1039/C39940001277
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