MANUFACTURING METHOD OF 2-HYDROXY-5-PHENYLALKYLAMINOBENZOIC ACID DERIVATIVES AND THEIR SALTS

摘要

The present invention provides an efficient method for mass-producing 2-hydroxy-5- ( substituted)phenylalkylaminobenzoic acid derivative represented by the specific Chemical formula or its salt, particularly 2-hydroxy-5-[ 2-( 4- trif luoromethylphenyl)ethylamino] benzoic acid or its salt.