申请人:Occidental Chemical Corporation
公开号:US05405995A1
公开(公告)日:1995-04-11
Disclosed are novel compounds having the formula ##STR1## where A is O or NR, each R' independently selected from hydrogen, R, or M, R is alkyl, aryl, alkaryl, or aralkyl from C.sub.1 to C.sub.12, and M is a cation. Also disclosed is a method of making those compounds and a method of making a mixture of 3,5-difluorobenzoic acid and 1,3-difluorobenzene by reacting 3,5-dichlorophthalic anhydride with a fluorinating agent to produce 3,5-difluorophthalic anhydride, reacting the 3,5-difluorophthalic anhydride with water to produce 3,5-difluorophthalic acid, and decarboxylating the 3,5-difluorophthalic acid.
本发明涉及一种新型化合物,其化学式为##STR1##其中A为O或NR,每个R'独立地选自氢、R或M,R为C.sub.1至C.sub.12的烷基、芳基、烷芳基或芳烷基,而M为阳离子。本发明还涉及一种制备该化合物的方法,以及通过将3,5-二氟苯甲酸酐与氟化剂反应以产生3,5-二氟苯甲酸酐,将3,5-二氟苯甲酸酐与水反应以产生3,5-二氟苯甲酸,并脱羧3,5-二氟苯甲酸以制备3,5-二氟苯甲酸和1,3-二氟苯的混合物的方法。