申请人:Central Glass Company, Limited
公开号:US10273200B2
公开(公告)日:2019-04-30
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 (Cl2), 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.
本发明公开了一种生产 3,3-二氟-2-羟基丙酸的实用方法,3,3-二氟-2-羟基丙酸是重要的医药和农业化学中间体。该方法包括通过 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。