The condensation of 1,8-bis-(p-hydroxyphenyl)octane (1) and 2,6-bis-(bromomethyl)-p-cresol (2) in dioxane in the presence of TiCl4 leads to a calix[4]arene (3) in which the cone conformation is fixed, since the para-positions of two opposite phenolic units are linked by an aliphatic chain.
V. Böhmer, H. Goldmann and W. Vogt, J. Chem. Soc., Chem. Commun., 1985, 667 DOI: 10.1039/C39850000667
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