Processes for production of 2-bromo-2,2-difluoroethanol and 2-(alkylcarbonyloxy)-1,1-difluoroethanesulfonic acid salt
申请人:Central Glass Company, Limited
公开号:US08110711B2
公开(公告)日:2012-02-07
Disclosed is a process for producing 2-bromo-2,2-difluoroethanol, which comprises reducing a bromodifluoroacetic acid derivative represented by the formula [1] by using an ate hydride complex as a reducing agent. 2-Bromo-2,2-difluoroethanol thus produced can be used as the starting material to carry out the esterification step, the sulfination step and the oxidation step in this order, thereby producing a 2-alkylcarbonyloxy-1,1-difluoroethanesulfonic acid salt, wherein A represents a substituted or unsubstituted linear, branched or cyclic alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 15 carbon atoms, a heteroaryloxy group having 4 to 15 carbon atoms, or a halogen atom.
本发明揭示了一种生产2-溴-2,2-二氟乙醇的方法,包括使用酸式溴二氟乙酸衍生物[1]通过使用酸式盐水合物还原剂还原。因此生产的2-溴-2,2-二氟乙醇可用作起始材料,按顺序进行酯化步骤、磺化步骤和氧化步骤,从而生成2-烷基羰氧基-1,1-二氟乙烷磺酸盐,其中A代表具有1到20个碳原子的取代或未取代的线性、支链或环状烷氧基,具有6到15个碳原子的取代或未取代的芳氧基,具有4到15个碳原子的杂环氧基或卤素原子。