Toluene → HCID 53941966, compound

Participants

Reaction Conditions

Reaction Steps

o-Allylphenol (245.6 g), 2,4'-difluorobenzophenone (200 g), potassium carbonate (187.4 g), dry N-methylpyrrolidone (700 ml) and toluene (250 ml) are placed in a 3-necked 2500 ml flask fitted with a stirrer, reflex condensor and thermometer and the mixture is heated under nitrogen to a temperature of 160° C. and stirred for 8 hours. Water and toluene are separated via a Dean Stark trap and finally after 8 hours the reaction mixture reaches a temperature of 160° C. The mixture is cooled to 100° C. and a 1:1 mixture of toluene/water (1100 ml) is added while stirring. After phase separation the aqueous layer is washed with toluene (200 ml) and the combined toluene layers are washed 4 times with water (400 ml). The toluene phase is dried over sodium sulphate and toluene distilled off by use of a rotary evaporator finally in vacuum leaving 2,4'-bis[o-(1-propenyl)phenoxy]benzophenone as a light yellow melt. The yield is 396 g. The product has a melt viscosity of 350 mPa.s at 70° C.

Provenance & Evidence