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- W4254329105 abstract "It is well known that N-acyl dipeptide esters are the useful optically active stationary phases for gas chromatographic separation of amino acid enantiomers, but N-acyl tripeptide esters give only smaller separation factors compared with the corresponding N-acyl dipeptide ester phases although tripeptide derivatives contain a longer peptide chain than dipeptide derivatives. In order to investigate the effect of extending the peptide chain in optically active stationary phases containing a s-triazine ring, we prepared the new s-triazine derivative of tripeptide ester, N, N'-[2, 4-(6-ethoxy-1, 3, 5-triazine)diyl]-bis-(L-valyl-L-valyl-L-valine isopropyl ester) [I]. It was found that this new compound has more excellent property in relation to enantiomer separation (amino acid and amine) compared with the corresponding s-triazine derivative of dipeptide ester, N, N'-[2, 4-(6-ethoxy-1, 3, 5-triazine)diyl]-bis-(L-valyl-L-valine isopropyl ester) [II]. For example, the separation factors for N-TFAD-L-methionine isopropyl ester are 1.089 on [I] and 1.029 on [II] at 150°C, and for N-TFA-dl-α-(1-naphthyl)ethylamine are 1.072 on [I] and 1.044 on [II] at 160°C. On the other hand, the maximum permissible operating temperature of this new stationary phase with an open tubular glass column (about 200°C) is considerably higher than those of all published optically active stationary phases. For example, in the isothermal mode at 200°C, N, N'-di-PFP-DL-lysine isopropyl ester was separated within 15 min on a 34 m column." @default.
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- W4254329105 date "1979-01-01" @default.
- W4254329105 modified "2023-10-17" @default.
- W4254329105 title "<I>s</I>-Triazine derivatives of tripeptide ester as novel stationary phase for the separation of amine and amino acid enantiomers by gas chromatography" @default.
- W4254329105 doi "https://doi.org/10.2116/bunsekikagaku.28.2_125" @default.
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