Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Synthesis and Molecular Structure of Tetrahomodioxa p-Phenylcalix[4]arene Tetra Ester Derivative in 1,4-Alternate Conformation

  • Published : 1999.08.20
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Abstract

Reaction of tetrahomodioxa p-phenylcalix[4]arene with ethyl bromoacetate and potassium carbonate in ace-tone leads to the title tetra ester derivative, 7,13,21,27-tetra-phenyl-29,30,31,32 -tetrakis(ethoxycarbonyl)meth-oxy-2,3,16,17-tetrahomo-3,17-dioxacalix[4]arene, its structure was determined by NMR spectra as 1,4-alternate conformation. The molecular structure has been solved by X-ray diffraction methods. The molecule has a conformation with pseudo center of symmetry. The benzene ring A is up, ring C is down, B and D rings are flat with respect to the plane of the macrocyclic ring.

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References

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