In an article, published in an article, once mentioned the application of 14098-44-3, Name is Benzo-15-crown-5,molecular formula is C14H20O5, is a conventional compound. this article was the specific content is as follows.Recommanded Product: Benzo-15-crown-5
(Chemical Equation Presented) A concise and experimentally straightforward method for assembling multiple benzo(crown ether) units around 1,3,5-triaroylbenzene scaffolds has been developed. Symmetrical tris(crown ether)s possessing three benzo(15-crown-5) or three benzo(18-crown-6) peripheral substituents have been prepared in good yield via cyclotrimerization of monomelic enaminones. Efficient cross-cyclotrimerizations have also been demonstrated through construction of unsymmetrical triaroylbenzenes functionalized with only one or two benzo(15-crown-5) moieties. The alkali cation-binding abilities of these mono- and polytopic crown ethers have been probed through picrate extraction experiments and isothermal titration calorimetry. Thermodynamic binding parameters uncovered using the latter technique reveal increasing K+/Na+ selectivity in the benzo(15-crown-5) series of compounds as a function of increasing numbers of benzo-(crown) units. The data also indicate that the triaroylbenzene-derived bis- and tris-crown ethers do not engage in intramolecular chelation of cations too large to be accommodated by individual crown macrorings. Instead, cation/triaroylbenzene stoichiometrics and binding profiles indicate formation of alkali metal-bridged dimers.
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