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Synthesis and Characterization of a Calixarene Analog Locked in the Cone Conformation

1992; Oxford University Press; Volume: 21; Issue: 5 Linguagem: Inglês

10.1246/cl.1992.755

1348-0715

Yukihiro Okada, Fuyuhiko Ishii, Yoshinori Kasai, Jun Nishimura,

Silicone and Siloxane Chemistry

Abstract A cone-formed calix[4]arene analog (2) was prepared in 89% yield from dihydroxy[2.5]metacyclophane as a building block. A rigidified calixarene analog having ethyl acetate units showed the remarkable selectivity in alkali metal ion extraction. Cyclophane 2 can easily be chiral by changing one, two, or three OH groups to some other achiral functional groups.