Stereospecific hydrolysis of 3-(4-methoxyphenyl)glycidic ester in supercritical carbon dioxide by immobilized lipase |
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Authors: | Markku Rantakylä Martti Alkio Olli Aaltonen |
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Institution: | (1) VTT Chemical Technology, Supercritical Technology, P.O. Box 1401, FIN02044 VTT, Finland |
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Abstract: | In the hydrolysis of racemic 3-(4-methoxyphenyl)glycidic acid methyl ester by immobilized Mucor miehel lipase in supercritical CO2 the initial hydrolysis rate of the (2S,3R)-form was faster than the rate of the (2R,3S) -form. The stereoisomeric excess of the (2R,3S)-form reached 87 % at 53 % total conversion level. The water content of the reaction mixture and the initial concentration of the 3-(4-methoxyphenyl) glycidic acid methyl ester had no effect on isomeric purity. The reaction rate in supercritical CO2 was considerably faster than in toluene/water -mixture. |
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