Odd-numbered oxacalix[n]arenes (n = 5, 7): synthesis and solid-state structures |
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Authors: | Van Rossom Wim Robeyns Koen Ovaere Magriet Van Meervelt Luc Dehaen Wim Maes Wouter |
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Institution: | Molecular Design and Synthesis, Department of Chemistry, Katholieke Universiteit Leuven, Celestijnenlaan 200F, 3001 Leuven, Belgium. |
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Abstract: | The critical synthetic access to odd-numbered calixn]arenes has evidently resulted in less attention for these macrocycles, although specific molecular recognition phenomena have been observed for some of them. A straightforward fragment coupling approach has been designed, applying kinetically controlled nucleophilic aromatic substitution reaction conditions, affording odd-numbered oxacalixn]arenes (n = 5, 7) selectively in high yields. The solid-state conformational behavior and the oxacalixn]arene cavity size were explored by single-crystal X-ray diffraction studies. |
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