Fig. 2: Substrate scope of various calix[4]arenes and naphthols.

A Substitution of lower ring of calix[4]arene (highlighted in red). B Scope of naphthols (highlighted in blue). C Various nucleophiles (highlighted in green).
A Substitution of lower ring of calix[4]arene (highlighted in red). B Scope of naphthols (highlighted in blue). C Various nucleophiles (highlighted in green).