Patent ID: 8716474

Claim:
A method of producing 2,4,6-tris(hydroxphenyl)-1,3,5-triazine compound represented by the following Formula (1): (wherein, R 1 , R 2 and R 3 are identical and represent a hydrogen atom, hydroxyl group or C 1 -C 4 alkyl group; T 1 , T 2 and T 3 are identical and represent a hydrogen atom, C 1 -C 4 alkyl group or C 2 -C 4 alkenyl group; and Y 1 , Y 2 and Y 3 are identical and represent a hydrogen atom or C 1 -C 4 alkyl group), wherein the reaction between cyanuric halide compound represented by the following Formula (2): (wherein, X 1 represents a halogen atom; and X 2 and X 3 each independently represent a halogen atom or a substituent by which hydrogen atom of the phenyl ring of the compound represented by the following Formula (3) is substituted) and hydroxyphenyl compound represented by the following Formula (3): (wherein, R 4 represents a hydrogen atom, hydroxyl group or C 1 -C 4 alkyl group; T 4 represents a hydrogen atom, C 1 -C 4 alkyl group or C 2 -C 4 alkenyl group; and Y 4 represents a hydrogen atom or C 1 -C 4 alkyl group) is carried out by using, as the reaction solvent, a solvent containing sulfolane as the main component in the presence of a catalyst consisting essentially of a Lewis acid at an amount of 0.3 to 0.7 equivalent with respect to 1 equivalent of halogen atom of the cyanuric halide compound represented by said Formula (2), or by using a mixed solvent of inert solvent and the cyclopentyl alkyl ether represented by the following Formula (4): Z 1 —O—Z 2 (4) (wherein, Z 1 represents a cyclopentyl group which optionally has a substintent(s); and Z 2 represents a C 1 -C 4 alkyl group which optionally has a substituent(s)).