A method that manufacturers an optically active carboxylic acid ester at high yield and high enantioselectivity is provided. An optically active carboxylic acid ester is manufactured at high yield and high enantioselectivity by reacting a racemic carboxylic acid and a specific alcohol or phenol derivatives in a polar solvent having a dipole moment of 3.0 or higher in the presence of an acid anhydride and an asymmetric catalyst, esterifying one enantiomer of the racemic carboxylic acid at high selectivity, and increasing the amount of esterified carboxylic acid by racemizing the optically active carboxylic acid which is the other enantiomer not used in esterification.
本发明提供了一种以高产率和高对映选择性生产光学活性
羧酸酯的方法。外消旋
羧酸和特定的醇或
苯酚衍
生物在偶极矩为 3.0 或更高的极性溶剂中,在酸酐和不对称
催化剂的存在下进行反应,以高选择性
酯化外消旋
羧酸的一种对映体,并通过消旋光学活性
羧酸(即
酯化过程中未使用的另一种对映体)来增加
酯化
羧酸的量。