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A series of 2-pyridylthio and 2-pyrimidinylthio derivatives of calix[4]arene have been synthesized and characterized by IR,  1 H NMR,  13 C NMR and MS.

Synthesis and characterization of heteroarylthio derivatives of 5,17-di- tert -butyl-11,23-diamido-25, 27-diprotected calix[4]arene