Abstract
The ionic liquid, l-butyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]amide ([Bmim] [NTf2]), was used as a reaction medium for the kinetic resolution of rac-2-pentanol catalyzed by free Candida antarctica lipase B, using vinyl propionate at 2% (v/v) water content. The synthetic activity of lipase in [Bmim] [NTf2] was up 2.5-times greater than in hexane, and showed high enantioselectivity (ee > 99.99%). The optimal temperature and pH were 60 degrees C and 7, respectively. A decrease in water activity (aw) produced a decay in synthetic activity, and an exponential increase in selectivity.
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