Studies on Synthesis and Conformation of Calix[4] arene Derivatives

Abstract

Abstract: Six new calix[4]arenes containing different substituents[Cl, Br ,CH₃,C(CH₃)₃] have been prepared from the cyclization of methylene bridged trimers of 4-substituted phenols and 2,6-bis (bromomethyl)-4-substituted phenols over the catalyst of TiCl₄ in diglyme solvent with about 25% yield.NMR studies of new calix[4] arenes revealed that methylene protons signals appear at about δ3.40 and 4.20 as coupling two double peaks and methylene 13Csignals appear at about δ31.5.The preferred conformation of all six calix[4]arenes are cone conformation in solution.

Key words: Calix[4]arene, Conformation, Synthesis, NMR

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LU Guo-Yuan, CHEN Zhong-Jun, ZHAO Rong-Zhong, HUANG Xiao-Hua, HU Hong-wen. Studies on Synthesis and Conformation of Calix[4] arene Derivatives[J]. Chem. J. Chinese Universities, 1996, 17(8): 1244.

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Studies on Synthesis and Conformation of Calix[4] arene Derivatives

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