Reacción #1002924

Ecuación de reacción

compound

7-Chloro-4H-1,2,4-benzothiadiazine 1,1-dioxide

K2CO3

1-bromo-4-fluorobutane

→

7-Chloro-4-(4-fluorobutyl)-4H-1,2,4-benzothiadiazine 1,1-dioxide

Disolventes

acetonitrile

Condiciones de reacción

Tratamiento posterior

1. 1
   workup.ADDITIONare added
2. 2
   workup.ADDITIONThe reaction mixture is introduced into a sealed autoclave
3. 3
   TemperaturaAfter cooling
4. 4
   Otrothe solvent is evaporated off under reduced pressure
5. 5
   FiltraciónThe insoluble material is collected by filtration
6. 6
   Lavadowashed with water
7. 7
   Otrodried
8. 8
   OtroThe precipitate is then recrystallised from a minimum of ethyl acetate with the aid
9. 9
   Temperaturaof heat
10. 10
    TemperaturaAfter cooling
11. 11
    Filtraciónthe title compound is collected by filtration
12. 12
    Lavadowashed with a minimum of ethyl acetate
13. 13
    Otrodried

Procedimiento

150 mg of the compound obtained in Step A of Example 1 are dissolved in 8 ml of acetonitrile, to which 300 mg of K2CO3 and 0.15 ml of 1-bromo-4-fluorobutane are added. The reaction mixture is introduced into a sealed autoclave and is heated at 100° C. for 3 hours. After cooling, the solvent is evaporated off under reduced pressure and the residue is taken up in a minimum of water. The insoluble material is collected by filtration, washed with water and dried. The precipitate is then recrystallised from a minimum of ethyl acetate with the aid of heat. After cooling, the title compound is collected by filtration, washed with a minimum of ethyl acetate and dried.

Fuente