Acetic Acid → HCID 14851951, compound

Participants

Reaction Steps

potassium tert.-butoxide, 2.5 g, was added to a suspension of 4.5 g of 5H-dibenz[b,e]azepine-6,11-dione in 50 ml of dimethylformamide. After stirring under nitrogen for 30 minutes, 2 ml of propargyl bromide was added and stirring was continued for I hour at room temperature. The reaction mixture was acidified with acetic acid and diluted with water. The precipitate was filtered off and sucked dry. The solids were dissolved in methylene chloride. The solution was dried and evaporated and the residue was chromatographed over 120 g of silica gel using methylene chloride. The combined clean fractions containing product were evaporated and the residue was crystallized from ether/hexane to give colorless crystals of 5-(2-propynyl)-5H-dibenz[b,e]azepine-6,11-dione with m.p. 117°-118°.

Provenance & Evidence