申请人:Kirin Beer Kabushiki Kaisha
公开号:US04803301A1
公开(公告)日:1989-02-07
There is provided a process for producing an optically active 2-phenoxypropionic acid, which comprises allowing an optically active lactic ester represented by the following formula (I) to react with a phenol represented by the following formula (II) in the copresence of a reagent A and a reagent B defined below to form an optically active 2-phenoxypropionic ester represented by the following formula (III), and liberating an optically active 2-phenoxypropionic acid represented by the following formula (IV) from the optically active 2-phenoxypropionic ester: ##STR1## wherein R.sup.1 represents a group to form a monovalent ester, which can be eliminated from the compound (III) under weakly basic to acidic conditions and R.sup.2 represents a hydrogen atom or 1 to 5 substituents which do not interfere in the reaction between the compounds (I) and (II); a reagent A being at least one compound selected from the group consisting of trialkylphosphine, trialkylphosphite, triarylphosphine and triarylphosphite; and a reagent B being at least one compound selected from the group consisting of dialkylazodicarboxylate and diarylazodicarboxylate.
提供一种生产光学活性2-苯氧基丙酸的方法,包括允许以下式(I)所代表的光学活性乳酸酯与以下式(II)所代表的苯酚在下述定义的试剂A和试剂B的共存下反应,形成以下式(III)所代表的光学活性2-苯氧基丙酸酯,并从光学活性2-苯氧基丙酸酯中释放出以下式(IV)所代表的光学活性2-苯氧基丙酸:其中R.sup.1代表形成一价酯的基团,可以在弱碱性至酸性条件下从化合物(III)中消除,R.sup.2代表氢原子或在化合物(I)和(II)之间的反应中不干扰的1至5个取代基;试剂A至少是从三烷基膦、三烷基膦酸酯、三芳基膦和三芳基膦酸酯组成的群体中选择的至少一种化合物;试剂B至少是从二烷基偶氮二羧酸酯和二芳基偶氮二羧酸酯组成的群体中选择的至少一种化合物。