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NMR and HPLC characterization of O-alkanoyl lactates prepared by lipase catalysis.

Kiran, K. R. and Divakar, S. (2002) NMR and HPLC characterization of O-alkanoyl lactates prepared by lipase catalysis. Indian Journal of Chemistry, 41B (8). pp. 1686-1693.

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Abstract

Lactic acid esters of organic acids like lauroyl, palmitoyl and stearoyl lactic acids prepared by using lipases have been characterized by 1H an 13C NMR spectra. The reaction mixture indicates the presence of several species due to complex esterification equilibria. Crystalline lactic acid employed for reactions shows more lactylate content than the commercially available lactic acid. The -CH-O- region between 4.03 and 5.13 ppm gives quite a lot of information on the ester formation as this region contains signals from free lactic acid, hydroxyl terminal group of lactylates, carboxyl terminal group of lactylates and lactic acid and lactylate esters of organic acids employed. The ester yields detemined by HPLC and NMR are comparable and are less than those determined by titration method.

Item Type: Article
Uncontrolled Keywords: Lactic acid; Titration
Subjects: 500 Natural Sciences and Mathematics > 04 Chemistry and Allied Sciences > 24 Organic Chemistry
Divisions: Fermentation Technology and Bioengineering
Depositing User: Somashekar K.S
Date Deposited: 08 Jul 2011 09:10
Last Modified: 08 Jul 2011 09:10
URI: http://ir.cftri.com/id/eprint/4708

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