Reacción #1561

Ecuación de reacción

Nitric acid

1-(2-chloro-4-fluorophenyl)-3-methyl-s-triazine-2,4,6(1H,3H,5H)-trione

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title product

Rendimiento 75.6%

1-(2-Chloro-4-fluoro-5-nitrophenyl)-3-methyl-s-triazine-2,4,6(1H,3H,5H)-trione

Rendimiento 75.6%

Disolventes

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ice water

sulfuric acid

Condiciones de reacción

Tratamiento posterior

1. 1
   Temperaturawhile maintaining the reaction mixture temperature below 10° C
2. 2
   workup.ADDITIONAfter the addition
3. 3
   Temperaturacooled to 10° C
4. 4
   FiltraciónThe resultant aqueous mixture is filtered
5. 5
   Otroto obtain a solid which
6. 6
   Lavadois washed with water
7. 7
   Otroair-dried

Procedimiento

Nitric acid (70% real, 8.3 mL, 0.131 mol) is added to a solution of 1-(2-chloro-4-fluorophenyl)-3-methyl-s-triazine-2,4,6(1H,3H,5H)-trione (32.4 g, 0.119 mol) in concentrated sulfuric acid while maintaining the reaction mixture temperature below 10° C. After the addition is complete, the reaction mixture is stirred at room temperature for 30 minutes, cooled to 10° C and diluted with ice-water. The resultant aqueous mixture is filtered to obtain a solid which is washed with water and air-dried to give the title product as a white solid (28.5 g, mp 135°-139° C.).

Fuente