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In the hydrolysis of racemic 3-(4-methoxyphenyl)glycidic acid methyl ester by immobilized Mucor mlehei lipase in supercritical CO 2 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 CO 2 was considerably faster than in toluene/water -mixture.