Abstract
p-tert-Butylthiacalix[4]arene, in which the four methylene bridges of p-tert-butylcalix[4]arene are replaced by sulfide linkages, is conveniently synthesized in a single step (54%) by heating a mixture of p-tert-butylphenol, elemental sulfur S8, and NaOH in tetraethylene glycol dimethyl ether with concomitant removal of the resulting hydrogen sulfide.