Patent ID: 8338612

Claim:
A process for producing 3-chloro-N-(3-chloro-5-trifluoromethyl-2-pyridyl)-α,α,α-trifluoro-2,6-dinitro-p-toluidine, which comprises (1) a step of reacting 2-amino-3-chloro-5-trifluoromethylpyridine and 2,4-dichloro-3,5-dinitrobenzotrifluoride in the presence of an alkali component selected from the group consisting of hydroxides and carbonates of alkali metals and hydroxides and carbonates of alkaline earth metals as a basic substance, a solvent selected from the group consisting of ketones, nitriles, ethers and esters and a substantial amount of water, (2) a step of neutralizing or acidifying the reaction mixture with an acid and (3) a step of removing the solvent from a mixture containing 3-chloro-N-(3-chloro-5-trifluoromethyl-2-pyridyl)-α,α,α-trifluoro-2,6-dinitro-p-toluidine as the reaction product and the reaction solvent by distillation to precipitate crystals of the product, wherein in the step (1), water is present in an amount of 20-40 mass/mass % in relation to the total of water and the solvent.