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Resolution of Racemic Ofloxacin Based on Co-Technology of Bubble Fractionation and Extraction

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Abstract

A method of bubble fractionation, with the help of solvent extraction, was developed for the resolution of racemic ofloxacin (rac OFLX). In this method, dibenzoyl-L-tartaric (L-DBTA), di-(2-ethylhexyl) phosphoric acid (D2EHPA) and sodium lauryl sulfate (SDS) were used as chiral collector, co-extractant and foamer, respectively. Several important parameters influencing the resolution performances, such as pH in aqueous phase, concentration of OFLX, concentration of L-DBTA, concentration of SDS and volume ratio of D2EHPA to n-octanol in solution, were investigated. The optimal resolution conditions were obtained with the aqueous phase pH 7, volume ratio of D2EHPA to n-octanol 6/14 in organic phase, concentration of SDS 0.42 mg mL−1, concentration of OFLX 1.67 mg mL−1, and concentration of L-DBTA 0.11 g mL−1. Under the optimal extraction conditions, the enantiomeric excess value (e.e.%) was 60.08% and the enantioselectivity (α) was 5.58. It was found that the capacity of enantioselective separation can be greatly improved by the co-technology.

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Acknowledgments

We wish to acknowledge the support of the National Science Foundation of China (NO.20776162 and NO.20805058) and Provincial Natural Science Foundation of Hunan (No.09JJ3026) on this work gratefully.

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Authors and Affiliations

  1. School of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, China

    Lin Li, FeiPeng Jiao, XinYu Jiang, LingXing Tian & XiaoQing Chen

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  1. Lin Li
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  2. FeiPeng Jiao
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  3. XinYu Jiang
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  4. LingXing Tian
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  5. XiaoQing Chen
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Correspondence to XiaoQing Chen.

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Li, L., Jiao, F., Jiang, X. et al. Resolution of Racemic Ofloxacin Based on Co-Technology of Bubble Fractionation and Extraction. Chromatographia 73, 423–429 (2011). https://doi.org/10.1007/s10337-011-1917-6

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  • DOI: https://doi.org/10.1007/s10337-011-1917-6

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