(a) Benzaldehyde (1 Moore) and 2-Hydroxy-3-methylbenzoic acid (2 Moore) in sulfuric acid solution condensation, sulfonation, then use ?4-Amino-5-hydroxynaphthalene-1-sulfonic acid oxidation, again with p-Methylaniline?condensation, then use fuming sulfuric acid sulfonating; (b) p-Chlorobenzaldehyde?condensation, oxidation, its product again and p-Methylaniline with Triethylamine hydrochloride reaction, then use fuming sulfuric acid sulfonate.
