First synthesis of lower-rim-substituted aryl ethers of p-tert-butylcalix[4]arene.
With the use of S(N)Ar or Ullmann reactions, the synthesis of the first lower-rim aryl ether derivatives of tert-butylcalix[4]arene is reported, as are some of their conformational properties, (1)H NMR spectra, and X-ray crystal structures. The lower-rim aryl pendants reported herein provide for new scaffolds upon which a host of other new molecular architectures can be constructed, thus extending the capability of the versatile calix[4]arenes even further.
Chowdhury
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Department of Chemistry, Memorial University Newfoundland, St. John's, Newfoundland A1B 3X7, Canada.
Georghiou
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PE