Hydrochloric Acid → HCID 45381424, compound

Participants

Reaction Steps

Commercial 4-chloro-1,2-phenylenediamine (214 mg) and 3-(biphenyl-4-yl)glutaric anhydride (399 mg) were dissolved in dichloromethane (5 ml) with heating. The dark solution was stirred at rt for 1 h. The precipitate formed was collected by suction filtration, washed with dichloromethane, and dried in vacuo to give a mixture of regioisomeric amides (0.48 g) as light brown solid. This solid was dissolved in 1,4-dioxane (1 ml) with heating. 4M HCl in 1,4-dioxane (3 ml) was added and the solution was heated to reflux for 1.5 h. The precipitate formed is isolated by suction filtration and washed with 1,4-dioxane and diethyl ether. The crude (0.4 g) is crystallised from acetic acid to provide 3-(biphenyl-4-yl)-4-(5-chloro-2-benzimidazolyl)butanoic acid HCl (0.27 g) as light brown crystals.

Provenance & Evidence