Research of Syntheses, Conformation and Identification Properties of p-tert-Butylcalix-1,4-2,5-bis-crown

Abstract

Abstract: By reacting calix-1,4-crowns with triethylene glycol ditosylates or 1,2-bis-tosyloxyethoxybenzene in NaH/DMF system, a series of new type of calixcrowns: p-tert-butylcaix-1,4-2,5-bis-crowns were synthesized in high yields of 70%, and it is found that this stepwise method is very effective for the syntheses of calix-bis-crowns. The conformations of the obtained calix-bis-crowns were discussed in detail and the third stable conformation of calixarene besides cone and 1,2,3-alternate conformation-1,4-alternate conformation was obtained. It was found that the identification properties of this calix-bis-crowns are utterly different from that of the analogous calixcrowns and compound 2b exhibits a high complexation selectivity towards n-PrNH₃⁺.

Key words: Calix-bis-crown, Syntheses, Conformation, Identification properties

CLC Number:

O612

TrendMD:

YANG Fa-Fu, CHEN Yuan-Yin . Research of Syntheses, Conformation and Identification Properties of p-tert-Butylcalix-1,4-2,5-bis-crown[J]. Chem. J. Chinese Universities, 2002, 23(12): 2268.

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Research of Syntheses, Conformation and Identification Properties of p-tert-Butylcalix-1,4-2,5-bis-crown

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