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Synthesis 1996; 1996(11): 1293-1295
DOI: 10.1055/s-1996-4391
short paper
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Facile Synthesis of Calix[5]arenes with Three Different Upper Rim Substituents

Kwanghyun No* , Kyoung Mee Kwon
  • *Department of Chemistry, Sookmyung Women’s University, Seoul 140-742, South Korea, Fax +82(2)7109413; E-mail hyun@egret.sookmyung.ac.kr
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Publikationsdatum:
31. Dezember 2000 (online)

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Four calix[5]arenes, which have three different substituents at the upper rim of calix, are synthesized by the ‘3+2’ fragmentation condensation reaction. An equimolar mixture of p-substituted phenol trimer (BCB) and 2,2’-bishydroxymethyl p-substituted phenol dimer (AA) was refluxed for 3.5 days in xylene to produce calix[5]arenes 5a-d in 27-32% isolated yield. The structure of the calix[5]arenes was established by elemental analysis and 1H NMR/13C NMR spectroscopy.

An efficient synthesis of differently substituted calix[5]arenes is reported.

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