Enantioselective extraction of mandelic acid enantiomers by L-dipentyl tartrate and β-cyclodextrin as binary chiral selectors
Tóm tắt
A new binary chiral selector system effective for the enantioselective extraction of racemic mandelic acid is presented. While L-dipentyl tartrate and β-cyclodextrin had a very low enantioselectivity as single selectors, a preferential extraction of D-mandelic acid to the organic phase was found in the binary selector system. Using decanol as organic solvent and pH of a phoshate buffer equal to 2.3, the distribution coefficients of D-and L-mandelic acids as high as 14.9 and 7.0, respectively, and the enantioselectivity value of 2.1 were found at optimum concentration of β-cyclodextrin.
Tài liệu tham khảo
Lacour, J., Goujon-Ginglinger, C., Torche-Haldimann, S., and Jodry, J. J., Angew. Chem., Int. Ed. Engl. 39, 3695 (2000).
Subramanian, G., Chiral Separation Techniques: A Practical Approach, p. 15. Wiley, New York, 2001.
Zhao, S. L. and Liu, Y. M., Electrophoresis 22, 2769 (2001).
Heldin, E., Lindner, K. J., Pettersson, C., Lindner, W., and Rao, R., Chromatographia 32, 407 (1991).
Keurentjes, J. T. F., Nabuurs, L. J. W. M., and Vegeter, E. A., J. Membr. Sci. 113, 351 (1996).
Tan, B., Luo, G. S., Xuan, Q., and Wang, J. D., Sep. Purif. Technol. 49, 186 (2006).
Tan, B., Luo, G. S., and Wang, J. D., Tetrahedron: Asymmetry 17, 883 (2006).
Li, B. H., Yang, X. M., Wu, X. J., Luo, Z. W., Zhong, C., and Fu, E., Supramol. Chem. 18, 507 (2006).
Armstrong, D. W. and Jin, H. L., Anal. Chem. 59, 2237 (1987).
Szemán, J. and Ganzler, K., J. Chromatogr., A 668, 509 (1994).
Jiao, F. P., Huang, K. L., Ning, F. R., Hu, W. G., and Yu, J. G., Sep. Sci. Technol. 41, 1893 (2006).
Arai, T., Koike, H., Hirata, K., and Oizumi, H., J. Chromatogr. 448, 439 (1988).
Prelog, V., Stojanac, Z., and Kovacevic, K., Helv. Chim. Acta 65, 377 (1982).
Prelog, V. and Mutak, S., Helv. Chim. Acta 66, 2274 (1983).
Prelog, V., Kovacevic, M., and Egli, M., Angew. Chem., Int. Ed. Engl. 28, 1147 (1989).