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首页> 外文期刊>The Kasetsart Journal >Theoretical Study of Enantiomer Recognition of β-Butyrolactone by Acetyl Cyclodextrins
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Theoretical Study of Enantiomer Recognition of β-Butyrolactone by Acetyl Cyclodextrins

机译:乙酰基环糊精对映体识别β-丁内酯的理论研究

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摘要

Cyclodextrins and their derivatives are widely used in chromatographic chiral seperation. Molecular mechanics was applied to study the enantiomer recognition of a chiral model, β-buty rolactone, by several acetyl derivatives of α-and β-cyclodextrins. At 0 K, β-butyrolactone bound near the wider rim of cyclodextrin rings. The stabilization energy of the complex formation, in vacuo, was in the range of -6 to -19 kcal/mol. It was found that van der Waals interaction was the major contribution for the host-guest complex formation. From this study, per(6-O-acetyl-2,3-di-O-methyl)-β-cyclodextrin (bcd-A) and per(6-O-dichloroacetyl-2,3-di-O-methyl)-β-lodextrin (bcd-2Cl) were found to be good chiral selectivity reagents with enantiomer differentiation energy of 4-5 kcal/mol.
机译:环糊精及其衍生物被广泛用于色谱手性分离中。应用分子力学研究了α-和β-环糊精的几种乙酰基衍生物对手性模型β-丁内酯的对映体识别。在0 K时,β-丁内酯在环糊精环的较宽边缘附近结合。在真空中,复合物形成的稳定能在-6至-19kcal / mol的范围内。发现范德华相互作用是宿主-客体复合物形成的主要贡献。根据这项研究,每(6-O-乙酰基-2,3-二-O-甲基)-β-环糊精(bcd-A)和每(6-O-二氯乙酰基-2,3-二-O-甲基)发现β-lodextrin(bcd-2Cl)是良好的手性选择性试剂,对映体的分化能为4-5 kcal / mol。

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