| 摘要 |
PROBLEM TO BE SOLVED: To readily obtain a compound useful as a raw material, etc. of a resin for coating in a high yield and purity by using a synthetically easy or readily available raw material compound. SOLUTION: (A) 4,6-Diamino-1,3,5-triazin-2-yl-benzonitriles are hydrolyzed in the presence of (B) an acidic catalyst (preferably sulfuric acid), preferably at 50-100 deg.C and pH of the reaction system is controlled to 3-6, preferably 3-5 to provide 4,6-diamino-1,3,5-triazin-2-yl-benzoic acids. Furthermore, sulfuric acid of the component B is preferably used in an amount of 0.3-2.0 based on 1mol component A. The component A is obtained by reacting isocyanobenzenes (e.g. o-dicyanobenzene) with dicyandiazide in the presence of a basic compound and an organic solvent. |
