4-Chloro-6-methoxy-1,3,5-triazin-2-amine → N-(2-difluoromethoxyphenylsulfonyl)-N'-(4-chloro-6-methoxy-1,3,5-triazin-2-yl)-urea

Participants

Reaction Steps

124.6 g of 2-difluoromethoxyphenyl-sulfonyl isocyanate in 100 ml of dioxane are added dropwise to a suspension of 80.3 g of 2-amino-4-chloro-6-methoxy-1,3,5-triazine in 400 ml of absolute dioxane in the course of 10 minutes. The reaction mixture is warmed to 90°-100° for 3 hours, and the solution is then cooled and concentrated to give 180 g of N-(2-difluoromethoxyphenyl-sulfonyl)-N'-(4-chloro-6-methoxy-1,3,5-triazin-2-yl)-urea of melting point 167°-168°.

Provenance & Evidence