New PDF release: Chiral Separations by Liquid Chromatography: Theory and

By Hassan Y. Aboul-Enein, Imran Ali

ISBN-10: 0824740149

ISBN-13: 9780824740146

Specific in its systematic and unique description of some of the varieties, constructions, and homes of chiral desk bound stages (CSPs) and their guidance, program, and destiny scope, this quantity highlights an collection of liquid chromatographic techniques, together with sub- and super-critical fluid chromatography, capillary electrochromatography, and skinny layer chromatography. Readers will locate: achievable optimization thoughts for enantiomeric answer on numerous sorts of CSPs and new ideas in liquid chromatography and similar applied sciences of chiral separations. it's a invaluable source choked with 1200 of the latest and proper literature citations.

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Extra resources for Chiral Separations by Liquid Chromatography: Theory and Applications (Chromatographic Science, Vol. 90) (Chromatographic Science Series)

Example text

40 Chapter 2 tuents, such as methoxy and nitro groups, show poor chiral recognition [18]. Racemic compounds can interact with polar substituents far from a chiral glucose residue. Therefore, bulky alkoxy substituents such as isopropoxy and isobutoxy improve resolving power [23]. Phenylcarbamate derivatives having both an electron-donating methyl group and electron-withdrawing substituents (chloro or fluoro groups), on the phenyl moieties were found to exhibit high enantioseparation for many racemates.

B) Benzoin with hexane–2-propanol–water (70 : 27 : 3, v=v=v) as the mobile phase. (c) Mandelic acid with ethanol as the mobile phase. (From Ref. ) The chiral recognition ability of a series of cellulose phenylcarbamate derivatives has been evaluated extensively [18,43]. The introduction of an electron-donating methyl group or an electron-withdrawing halogen at the 3and=or 4-position improved the resolution ability, but substituents at position 2 showed poor chiral resolution capacity. The derivatives with heteroatom substi- Copyright © 2003 by Marcel Dekker, Inc.

1 Analytical Separations A single CSP cannot be used for the chiral resolution of all racemic compounds. Therefore, different CSPs were used for the chiral resolution of different racemates. To make this part easy and clear, Table 1 includes the names of 20 CSPs and their most frequent applications. However, some other interesting applications are possible. Upon screening about 510 racemic compounds described in the literature, we observed that 229 of them resolved completely and 86 partially on cellulose tris(3,5-dimethylphenylcarbamate), and the rest not at all.

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Chiral Separations by Liquid Chromatography: Theory and Applications (Chromatographic Science, Vol. 90) (Chromatographic Science Series) by Hassan Y. Aboul-Enein, Imran Ali

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