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首页> 外文期刊>Magnetic Resonance in Chemistry: MRC >Multinuclear magnetic resonance, electrospray ionization time-of-flight mass spectral and molecular modelling characterization of lithocholic acid amide esters with various nitrogen heterocycles
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Multinuclear magnetic resonance, electrospray ionization time-of-flight mass spectral and molecular modelling characterization of lithocholic acid amide esters with various nitrogen heterocycles

机译:多核磁共振,电喷雾电离飞行时间质谱和具有各种氮杂环的石碳酸酰胺酯的分子模型表征

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摘要

H-1, C-13 and N-15 NMR and electrospray ionization time-of-flight mass spectrometric characterizations of five lithocholate esters of piperazine diamides are described. Two of them are cholaphane-type cyclic structures esterified with 2,2'-bipyridine-4,4'- and pyridine-2,6-dicarboxylic acid and the other three esters are open structures comprising two or four lithocholyl residues. The conformational preferences of the dimeric congeners were examined by using molecular modelling and variable-temperature H-1 NMR techniques. Copyright (C) 2003 John Wiley Sons, Ltd. [References: 51]
机译:描述了五种哌嗪二酰胺的石胆酸酯的H-1,C-13和N-15 NMR和电喷雾电离飞行时间质谱表征。它们中的两个是被2,2'-联吡啶-4,4'-和吡啶-2,6-二羧酸酯化的胆烷型环状结构,另外三个酯是包含两个或四个锂胆酰基残基的开放结构。通过使用分子建模和可变温度H-1 NMR技术检查了二聚体同源物的构象偏好。版权所有(C)2003 John Wiley Sons,Ltd. [参考:51]

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