申请人:CENTRAL GLASS COMPANY, LIMITED
公开号:US20180037533A1
公开(公告)日:2018-02-08
Disclosed is a practical method for production of 3,3-difluoro-2-hydroxypropionic acid, which is important as pharmaceutical and agrichemical intermediates. The method includes forming a 4,4-difluoro-2,2-dichloro-3-oxobutanoic acid ester by reaction of a 4,4-difluoro-3-oxobutanoic acid ester with chlorine (Cl
2
), forming 3,3-difluoro-1,1-dichloro-2-propanone by reaction of the chlorination product with an acid, and then, reacting the degradation product with a basic aqueous solution.
揭示了一种用于生产3,3-二氟-2-羟基丙酸的实用方法,该方法作为药用和农药中间体具有重要意义。该方法包括通过将4,4-二氟-3-氧代丁酸酯与氯(Cl2)反应形成4,4-二氟-2,2-二氯-3-氧代丁酸酯,通过将氯化产物与酸反应形成3,3-二氟-1,1-二氯-2-丙酮,然后将降解产物与碱性水溶液反应。