反应详情

温度

35 °C

Into a 50 milliliter glass reactor equipped with a thermometer connected to a temperature controller, a heating mantle, a condenser and a magnetic stirring bar, is charged 5.39 gms, (0.0177 mole) of tri-p-tolyl phosphine and 23 gms of toluene. The slurry is heated to 35° C., then 3.6 gms (0.0211 mole) of benzyl bromide is added. This reaction mass is heated to 40° C. in 0.25 hour and maintained for 4 hours, then cooled to 29° C. and the resulting phosphonium salt collected by filtration. The salt is washed with 25 gms of toluene then vacuum dried. There is obtained 6.7 gms of catalyst which has a melting point of >250° C. and a chemical shift of 22.1 ppm (phosphoric acid reference).

1. customInto a 50 milliliter glass reactor equipped with a thermometer
2. temperatureThis reaction mass is heated to 40° C. in 0.25 hour
3. temperaturemaintained for 4 hours
4. temperaturecooled to 29° C.
5. filtrationthe resulting phosphonium salt collected by filtration
6. washThe salt is washed with 25 gms of toluene
7. customvacuum dried
8. customThere is obtained 6.7 gms of catalyst which