A process for producing an optically active 2-hydroxybutyric ester (1), characterized by including reacting an optically active 2,3-epoxybutyric ester (2) with a thiol in the presence of scandium trifluoromethanesulfonate or ytterbium trifluoromethanesulfonate, to thereby produce Compound (3), and subjecting Compound (3) to desulfurization reaction:
(wherein R represents a C1 to C6 alkyl group or a C7 or C8 aralkyl group; R1 represents a C1 to C12 alkyl group or a phenyl group; and * represents S- or R-absolute configuration). The present invention provides a process for producing an optically active 2-hydroxybutyric ester at high yield and high optical purity.
一种制备光学活性2-羟基
丁酸酯(1)的方法,其特征在于将光学活性的2,3-环氧
丁酸酯(2)与
硫醇在
三氟甲烷磺酸钪或三
氟甲烷磺酸镱的存在下反应,从而产生化合物(3),并将化合物(3)进行脱
硫反应:(其中,R代表C1到C6烷基或C7或C8芳基烷基;R1代表C1到C12烷基或苯基;*代表S-或R-绝对构型)。本发明提供了一种高产率和高光学纯度的制备光学活性2-羟基
丁酸酯的方法。