Ammonia → HCID 66758872, compound

Participants

Reaction Steps

The 1:1-mixture of 3-(biphenyl-4-yl)-7-chloro-3,4-dihydropyrido[1,2-a]benzimidazol-1(2H)-one and 3-(biphenyl-4-yl)-8-chloro-3,4-dihydropyrido[1,2-a]benzimidazol-1(2H)-one (200 mg) was dissolved in 1,4-dioxane (3 ml) at reflux temperature. A 25% solution of ammonia in water (1 ml) was added to give a light red solution. Refluxing was continued for 2 h while addition of 25% ammonia solution in 1 ml portions was repeated every half an hour (3 times). Then all volatiles were removed at the water aspirator and the residue was triturated with acetone to leave 3-(biphenyl-4-yl)-4-(5-chloro-2-benzimidazolyl)butyramide (165 mg) as light yellowish solid.

Provenance & Evidence