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- W2029027463 abstract "Stereoselective esterification of racemic menthol in n-hexane using acid anhydrides as acylating agents was successfully achieved with lipase AY-30 from Candida cylindracea. Molar yields of menthyl esters as high as 23–30% were observed in the control without the presence of enzyme after 48 h incubation at 30°C in n-hexane. Molar percentage yield, enantiomeric ratio (E), and percentage enantiomeric excess (ee%) of product menthyl esters were estimated using capillary gas chromatography and a chiral column. The (−) menthol was preferentially esterified by lipase AY-30 with a yield as high as 64%. The highest E (14) and ee% (86%) were achieved in n-hexane solution containing a 1:1 molar ratio (±)menthol:butyric anhydride. The addition of a weak base, NaHCO3, did not enhance enantioselectivity of lipase AY-30; however, it did improve the overall yields in both the control and the systems containing lipase AY-30." @default.
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- W2029027463 date "1996-05-01" @default.
- W2029027463 modified "2023-09-25" @default.
- W2029027463 title "Lipase-catalyzed stereoselective esterification of dl-menthol in organic solvents using acid anhydrides as acylating agents" @default.
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- W2029027463 doi "https://doi.org/10.1016/0141-0229(95)00182-4" @default.
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