Treatment of 2,2′-hexyl-linked p-tert-butyldicalixarene (1) with concentrated sulfuric acid resulted a 43% yield of a completly ipso-sulfonated dicalixarene product (2). 1H and 13C NMR spectroscopy of 2 showed no resonances for residual tert-butyl groups. The stoichiometry of binding of sulfonated species 2 with cationic aromatic heterocycles will be investigated by spectroscopy and titration measurements.

Synthesis of sulfonated dicalixarenes for supramolecular assemblies via non-covalent host-guest interactions

251st National Meeting (2016)

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