Reacción #78383

Ecuación de reacción

water

methyl 2-[1-amino-1-(4-fluorophenyl)-methylene]-4-methyl-3-oxopentanoate

cyanamide

→

methyl 2-amino-4-(4-fluorophenyl)-6-isopropylpyrimidine-5-carboxylate

Rendimiento 22.0%

Disolventes

hexane ethyl acetate

Condiciones de reacción

Tratamiento posterior

1. 1
   Temperaturaheated to reflux
2. 2
   TemperaturaThe mixture was cooled in an ice bath
3. 3
   Otrothe deposited precipitate was isolated by means of a suction
4. 4
   Filtraciónfilter
5. 5
   OtroAfter drying
6. 6
   Otro2.72 g of crude product were obtained in the form of a yellowish solid

Procedimiento

5.00 g of methyl 2-[1-amino-1-(4-fluorophenyl)-methylene]-4-methyl-3-oxopentanoate (18.7 mmol) were treated with 5 ml of N-N-dimethylacetamide and 15.71 g of a 50% strength aqueous cyanamide solution (187 mmol) and heated to reflux. After 5 h, the solution was poured onto 50 ml of water. The mixture was cooled in an ice bath and the deposited precipitate was isolated by means of a suction filter. After drying, 2.72 g of crude product were obtained in the form of a yellowish solid. After flash chromatography (150 g of silica gel; eluent: hexane/ethyl acetate 3:2), 1.19 g of methyl 2-amino-4-(4-fluorophenyl)-6-isopropylpyrimidine-5-carboxylate were isolated in the form of a colourless solid.

Fuente