PROCESS OF PREPARATION OF SUBSTITUTED TETRAFLUOROBENZYLANILINE COMPOUND AND ITS PHARMACEUTICALLY APPROVED SALTS

摘要

This invention relates to a method for preparing tetrafluorobenzyl-5- aminosalicylic acid derivative and its pharmaceutically acceptable salt compounds. In particular, this invention relates to a method for preparing tetrafluorobenzyl-5-aminosalicylic acid derivative and its pharmaceutically acceptable salts by using tetrafluorobenzilidine-5-aminosalicylic acid derivative as an intermediate.