Ten novel xylan bisphenylcarbamate derivatives bearing meta- and para-substituents on their phenyl groups were synthesized and their chiral recognition abilities were evaluated as the chiral stationary phases (CSPs) for high-performance liquid chromatography (HPLC) after coating them on macroporous silica. The chiral recognition abilities of these CSPs depended on the nature, position, and number of the substituents on the phenyl moieties. The introduction of an electron-donating group was more attractive than an electron-withdrawing group to improve the chiral recognition ability of the xylan phenylcarbamate derivatives. Among the CSPs discussed in this study, xylan bis(3,5-dimethylphenylcarbamate)-based CSP seems to possess the highest resolving power for many racemates, and the meta-substituted CSPs showed relatively better chiral recognition than the para-substituted ones. For some racemates, the xylan bis(3,5-dimethylphenylcarbamate) derivative exhibited higher enantioselectivity than the CSP based on cellulose tris(3,5-dimethylphenylcarbamate).

译文

合成了十种在其苯基上带有间位和对位取代基的新型木聚糖双苯基氨基甲酸酯衍生物,并将其手性识别能力评估为高效液相色谱 (HPLC) 的手性固定相 (csp)。大孔二氧化硅。这些csp的手性识别能力取决于苯基部分上取代基的性质,位置和数量。引入给电子基团比吸电子基团更具吸引力,以提高木聚糖苯基氨基甲酸酯衍生物的手性识别能力。在本研究中讨论的CSP中,基于木聚糖双 (3,5-二甲基苯基氨基甲酸酯) 的CSP似乎对许多外消旋物具有最高的分辨能力,并且间位取代的CSP比对位取代的CSP显示出相对更好的手性识别能力。对于某些外消旋物,木聚糖双 (3,5-二甲基苯基氨基甲酸酯) 衍生物比基于纤维素三 (3,5-二甲基苯基氨基甲酸酯) 的CSP表现出更高的对映选择性。

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