申请人:Hoechst Aktiengesellschaft
公开号:US05446198A1
公开(公告)日:1995-08-29
The present invention relates to the novel compound 4-hydroxy-2,3,5-trifluorobenzoic acid and to a process for preparing this novel substance by reacting 2,3,4,5-tetrafluorobenzoic acid at elevated temperature with a basic compound dissolved and/or suspended in water, adding, if desired, a fluoride scavenger, bringing the resulting reaction mixture to a pH of 0 to 6 by addition of an acid, and isolating the 4-hydroxy-2,3,5-trifluorobenzoic acid formed.
本发明涉及一种新型化合物4-羟基-2,3,5-三氟苯甲酸以及制备该新物质的方法,其通过在高温下将2,3,4,5-四氟苯甲酸与溶解和/或悬浮于水中的碱性化合物反应,如果需要,加入氟化物清除剂,通过加入酸将反应混合物的pH调节至0至6,并分离出形成的4-羟基-2,3,5-三氟苯甲酸。