Diethyl Ether → 1,2-Diphenylbenzimidazole

Participants

Reaction Conditions

Reaction Steps

40 ml of N-phenyl-1,2-phenylenediamine (7.36 g, 40 mmol) was charged in a 250 ml round bottle, 10 ml of triethylamine was then added, and the mixture was cooled to 0° C. Benzoyl chloride (5.6 g, 40 mmol) was dissolved in 40 ml of dichloromethane and then slowly added to the 250 ml round bottle. The reaction was conducted under a nitrogen atmosphere for 6 hours. After the reaction was complete, ether was added to form precipitate. The solid product was collected by filtration, washed with ether several times, and heated under reduced pressure to form 1,2-diphenyl-1H-benzoimidazole (yield=7.56 g, 70%).

Provenance & Evidence