Reacción #1253195

Ecuación de reacción

1-(2-Fluoroethyl)-2-oxopiperazine trifluoroacetate

N,N-Diisopropylethylamine

3,4-difluoronitrobenzene

→

3-fluoro-4-(4-{2-fluoroethyl}-3-oxopiperazin-1-yl)nitrobenzene

Disolventes

acetonitrile

Condiciones de reacción

Tratamiento posterior

1. 1
   Temperaturathe mixture heated
2. 2
   Temperaturato reflux for 18 hours
3. 3
   OtroThe solvent is removed
4. 4
   Otrothe residue chromatographed (silica
5. 5
   Lavadoeluting with a gradient
6. 6
   Temperaturaincreasing in polarity from 0 to 4% methanol in dichloromethane)

Procedimiento

1-(2-Fluoroethyl)-2-oxopiperazine trifluoroacetate (6.1 g) is dissolved in acetonitrile (100 ml). N,N-Diisopropylethylamine (13 ml) is added to the mixture, followed by 3,4-difluoronitrobenzene (3.39 g) and the mixture heated to reflux for 18 hours. The solvent is removed and the residue chromatographed (silica; eluting with a gradient increasing in polarity from 0 to 4% methanol in dichloromethane) to give 3-fluoro-4-(4-{2-fluoroethyl}-3-oxopiperazin-1-yl)nitrobenzene.

Fuente