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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 Cu I affording the complexes 6 – 8 are described.
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Vains et al. (1994) studied this question.
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