申请人:Vifor (International) Ltd.
公开号:US10584089B2
公开(公告)日:2020-03-10
The present invention generally relates to processes for converting acrylate esters or a derivative thereof to difluoropropionic acid or a derivative thereof. This process is generally performed using fluorine gas in a hydrofluorocarbon solvent. In particular, a process for fluorinating a double bond is disclosed. This process comprises forming a reaction mixture comprising a hydrofluorocarbon solvent, fluorine gas, and a compound of formula 1
wherein R1 is hydroxy, alkoxy, chloro, or —OC(O)CH═CH2 to form a compound of formula 2 in a yield of at least 50%
wherein R2 is hydroxy, alkoxy, chloro, —OC(O)CHFCH2F, wherein the hydrofluorocarbon solvent comprises 2H,3H-decafluoropentane and the reaction mixture further comprises a fluorination agent.
本发明一般涉及将丙烯酸酯或其衍生物转化为二氟丙酸或其衍生物的工艺。该工艺一般是在氢氟碳溶剂中使用氟气进行的。特别是公开了一种使双键氟化的工艺。该工艺包括形成一种反应混合物,该混合物包括氢氟碳溶剂、氟气和式 1 的化合物。
其中 R1 是羟基、烷氧基、氯或-OC(O)CH═CH2,形成式 2 化合物,产率至少为 50
其中 R2 是羟基、烷氧基、氯、-OC(O)CHFCH2F,其中氢氟碳溶剂包括 2H,3H-十氟戊烷,反应混合物进一步包括氟化剂。