Triethylamine → HCID 21536164, compound

Participants

Reaction Steps

2-(4-Fluorophenyl)-1,2,4-oxadiazolidin-3,5-dione (0.03 mole), toluene (100 ml) and triethylamine (5 ml) are charged into a glass reaction vessel equipped with a mechanical stirrer, thermometer and reflux condenser. 2,6-Difluorobenzoyl chloride (0.03 mole) dissolved in toluene (20 ml) is then added to the reaction flask and the resulting mixture is heated at reflux with stirring for a period of about 24 hours. After this time the reaction mixture is filtered and the filtrate is washed with water, dilute hydrochloric acid and with aqueous sodium bicarbonate. The washed solution is then dried over anhydrous magnesium sulfate. The dried solution is stripped of solvent under reduced pressure leaving a solid residue. The residue is recrystallized to yield the desired product 2-(4-fluorophenyl)-4-(2,6-difluorobenzoyl)-1,2,4-oxadiazolidin-3,5-dione.

Provenance & Evidence