Abstract
The solvent effects of cyclopentyl methyl ether (CPME) on the reaction rates and enzyme enantioselectivity in the enantioselective transesterifications of racemic 6-methyl-5-hepten-2-ol (racemic sulcatol: SUL) and racemic 2,2-dimethyl-1,3-dioxolane-4-methanol (racemic solketal: SOL) with a series of enol esters catalyzed by Pseudomonas cepacia lipase co-lyophilized with cyclodextrins (α-, β-, γ-, partially methylated β-,␣and 2,3,6-tri-O-methyl-β-cyclodextrin: αCyD; βCyD; γCyD; Me1.78 βCyD; Me3βCyD) were investigated and compared with those in diisopropyl ether (IPE). In the case of SUL, enzyme activities of the co-lyophilizate with Me1.78 βCyD in CPME were lower than those in IPE with every acyl source, however, the absolute enantiopreference was shown in the transesterification with vinyl butyrate (VBR) in IPME. When the substrates were SOL and VBR, the enzyme activities in CPME were greatly enhanced as high as 1.6–9.8-fold, while the enantioselectivities in CPME were comparable to those in IPE.
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Revisions requested 16 December 2004; Revisions received 17 January 2005
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Mine, Y., Zhang, L., Fukunaga, K. et al. Enhancement of enzyme activity and enantioselectivity by cyclopentyl methyl ether in the transesterification catalyzed by Pseudomonas cepacia lipase co-lyophilized with cyclodextrins. Biotechnol Lett 27, 383–388 (2005). https://doi.org/10.1007/s10529-005-1527-1
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DOI: https://doi.org/10.1007/s10529-005-1527-1