Phosphoric Acid → HCID 18958202, compound

Participants

Reaction Conditions

Reaction Steps

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 5.04 gms (0.0166 mole) of trip-p-toly phosphine and 25 gms of toluene. The slurry is heated to 30° C. then 4.6 gms (0.0184 mole) of 4-bromobenzyl bromide is added. This reaction mass is heated to 100° C. and maintained at that temperature for 3.5 hours, then cooled to 29° C. and the resulting phosphonium salt collected by filtration. The salt is washed with 12 gms of toluene then vacuum dried. There is obtained 7.5 gms of catalyst which has a melting point of >250° C. and a chemical shift of 22.1 ppm (phosphoric acid reference).

Provenance & Evidence