Synthesis and Complexation Properties of a New Class of Receptors based on a cone‐configurated tetra‐p‐(tert‐butyl)calix[4]arene and bipyridyl subunits

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Abstract
0The bipyridyl‐armed tetra‐p‐(tert‐butyl)calix[4]arenes 1–5 were synthesized from tetra‐p‐(tert‐butyl)‐calix[4]arene A and 6‐(bromomethyl)‐6′‐methyl‐2,2′‐bipyridine (B) by direct base‐strength‐driven regioselective O‐alkylation or by stepwise procedures. Preliminary complexation studies of the ligands 1–3 with CuI affording the complexes 6–8 are described.