Reacción #50275

Ecuación de reacción

4,4-bis(2-bromotetrafluoroethoxy)-α-methylstilbene

→

crude product

4,4'-Bis(trifluoroethenyloxy)-α-methylstilbene

Disolventes

acetonitrile

acetonitrile

Condiciones de reacción

Tratamiento posterior

1. 1
   workup.ADDITIONaddition funnel
2. 2
   Otroattached to a 1 liter 5-necked round bottomed flask
3. 3
   Otrois deoxygenated with nitrogen for 10 minutes
4. 4
   workup.ADDITIONby introducing nitrogen gas through a gas dispersion tube
5. 5
   workup.ADDITIONthe addition of intermediate product solution in acetonitrile
6. 6
   workup.ADDITIONThe addition
7. 7
   Temperaturathe resulting mixture is heated at 75° C. overnight
8. 8
   OtroAfter centrifugation to remove
9. 9
   Otrothe resulting supernatant is evaporated to dryness

Procedimiento

The intermediate product 4,4-bis(2-bromotetrafluoroethoxy)-α-methylstilbene (106.43 g, 0.18 mole) is added to 100 ml of acetonitrile in a 250 ml dropping addition funnel attached to a 1 liter 5-necked round bottomed flask. Zinc granules (40 mesh, 25.0 g, 0.38 mole) are added to the reactor along with 100 ml of acetonitrile, and the resulting stirred suspension is deoxygenated with nitrogen for 10 minutes by introducing nitrogen gas through a gas dispersion tube. The suspension is then heated to 75° C., at which point the addition of intermediate product solution in acetonitrile is begun. The addition is carried out over 20 minutes, and the resulting mixture is heated at 75° C. overnight. After centrifugation to remove suspended solids, the resulting supernatant is evaporated to dryness, leaving a crude product which is filtered through a short bed (4 cm) of alumina in a 600 ml sintered glass filter funnel using hexane as the eluent. After removal of the hexane by evaporation, the product is heated at 55° C. under high vacuum for 30 minutes.

Fuente