Preparation and evaluation of a doubly tethered chiral stationary phase based on (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid |
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Authors: | Hyun Myung Ho Kim Do Hun Cho Yoon Jae Jin Jong Sung |
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Affiliation: | Department of Chemistry and Chemistry Institute for Functional Materials, Pusan National University, Pusan 609-735, Republic of Korea. mhhyun@pusan.ac.kr |
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Abstract: | A new doubly tethered chiral stationary phase (CSP) was prepared to enhance CSP stability as well as to take advantage of the tertiary amide linkage by bonding (+)-(18-crown-6)-2,3,11,12-tetracarboxylic acid to bis(3-aminopropyl)silica gel. The new CSP was quite effective in the resolution of alpha-amino acids, beta-amino acids, amino alcohols, and amines and the chromatographic resolution behaviors of the new CSP were exactly consistent with those of the corresponding singly tethered CSP containing N-CH3 tertiary amide linkage. Direct comparison between the stabilities of the new CSP and the corresponding singly tethered CSP containing N-CH3 tertiary amide linkage under harsh chromatographic conditions reveals that the new CSP is more stable than the latter. |
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Keywords: | Chiral stationary phase (+)‐(18‐Crown‐6)‐2,3,11,12‐tetracarboxylic acid Enantiomer separation Doubly tethered chiral selector |
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