Optically active chroman-3-acetic acids and optically active chroman-3-acetic acid esters can be obtained by treating a mixture of (3R)- and (3S)-chroman-3-acetic esters of formula (I)
[wherein R1 is a straight or branched alkyl group having 1-5 carbon atoms and R2 is a hydrogen atom or substituted or unsubstituted amino group]
is treated with an esterase which has an optically selective hydrolyzing activity or microorganisms which carry said hydrolase, or a preparation therefrom. A novel esterase derived from bacteria of genus Pseudonocardia can also be used as said esterase.
通过处理式 (I) 的 (3R)- 和 (3S)- 色满-3-
乙酸酯混合物,可获得光学活性色满-3-
乙酸和光学活性色满-3-
乙酸酯
[其中 R1 是具有 1-5 个碳原子的直链或支链烷基,R2 是氢原子或取代或未取代的
氨基]
用具有光学选择性
水解活性的
酯酶或携带上述
水解酶的微
生物或其制备物处理。也可以使用从假心属细菌中提取的新型
酯酶作为所述
酯酶。