Lipase-Catalyzed Synthesis and Characterization of 6-O-11-Dodecenoic-Glucose Ester in Ionic LiquidsReport as inadecuate




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Novozym-435 Lipase-catalyzed transesterification of glucose with 11-dodecenoic ethyl ester in ionic liquids was investigated. The effect of substrate ratio, lipase content, and temperature on the activity and stability of lipase was also studied. The highest yield of sugar ester was obtained in 1-buty-3-methyl imidazolium tetrafluoroborate BmimBF4 under such conditions as the reaction temperature of 55℃, the enzyme concentration of 20 mg-mL, the mole ratio of glucose-11-dodecenoic ethyl ester of 1:2, the water content of the system of 2%, Lipase Novozym-435 can use repeatedly 7 times. The structure of production was characterized by FTIR, HPLC, MS and NMR. The results show that the production is 6-O-11-dodecenoic-glucose ester.

KEYWORDS

Ionic LiquidsILs; 6-O-11-Dodecenoic-Glucose Ester; Lipase; 11-Dodecenoic Ethyl Ester; Glucose

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P. Yao, G. Huang, W. Yan, X. Zhang, Q. Li and Y. Wei -Lipase-Catalyzed Synthesis and Characterization of 6-O-11-Dodecenoic-Glucose Ester in Ionic Liquids,- Advances in Chemical Engineering and Science, Vol. 2 No. 2, 2012, pp. 204-211. doi: 10.4236-aces.2012.22025.





Author: Ping-Jia Yao, Guang-Jun Huang, Wei Yan, Xin Zhang, Qunliang Li, Yuan-An Wei

Source: http://www.scirp.org/



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