The effect of temperature on the lipase-catalyzed asymmetric protonation of 1-acetoxy-2-methylcyclohexene giving (R)-2-METHYLCYCLOHEXANONE (cas 1331-22-2)
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Add time:08/25/2019 Source:sciencedirect.com
Lipase-catalyzed enantioface-selective protonation of the enol acetate of 2-methylcyclohexanone was performed by using Burkholderia cepacia lipase immobilized on porous ceramic particles, `Lipase PS-C II' (Amano Enzyme Inc.), in i-Pr2O and ethanol, giving (R)-2-methylcyclohexanone with 77% ee at best with 82% conversion at 0 °C. The enantioselectivity (E-value) was found to be temperature dependent and significant in controlling the efficiency of the asymmetric protonation.
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