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Effect of solvent on lipase-catalyzed transesterification in organic media

✍ Scribed by Kaoru Nakamura; Masamichi Kinoshita; Atsuyoshi Ohno

Publisher: Elsevier Science
Year: 1994
Tongue: French
Weight: 542 KB
Volume: 50
Category: Article
ISSN: 0040-4020
DOI: 10.1016/s0040-4020(01)85007-9

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✦ Synopsis

Lipase-catalyzed transesterifications of cis-and Iran.+4-methylcyclohexanols with vinyl acetate in various organic solvents have been studied, and the cffcct of' solvent on activity and stereoselectivity of lipase has been investigated. Initial rate of the reaction increases with the increase in hydrophobicity of the solvent exerting a good correlation with logf ', a corrected index of IogP. However, since the stereoselectivi~y is also affected by molecularity OC the solvent, the correlation between stereosclcctivity l'actor, y, and log/" is poor. The solvent en'cct on Ihc stcreoselectivity has been correlated with excellent linearity by the aid of two-parameter relationship; y= a(~,-1)/(2&r+]) + bV,, where E, and V, denote dielectric constant and molar volume of the solvent, respectively.

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