Acetic Acid → HCID 23447292, compound

Participants

Reaction Steps

To a solution of N— (tert-butoxycarbonyl)ethylenediamine (5.0 g) and 4-(1H-imidazol-1-yl)benzaldehyde (5.35 g) in methanol (10 ml) was added acetic acid (300 mg), and the mixture was stirred at room temperature for 1 hour. To the mixture was added, under ice-cooling, sodium triacetoxyborohydride (318 mg), and the mixture was stirred at room temperature for 5 hours. The reaction solution was concentrated, and the residue was dissolved in ethyl acetate. The solution was extracted with water, and the aqueous layer was made alkaline with sodium hydroxide solution. The mixture was extracted with dichloromethane and dried with sodium sulfate, and sodium sulfate was filtered off. To the filtrate was added triethylamine (6.3 g) and then was added at 0° C. chloroacetyl chloride (3.53 g), and the mixture was stirred at room temperature for 30 minutes. The reaction solution washed with sodium bicarbonate solution and brine, dried and concentrated, and the residue was dissolved in DMF (100 ml). To the solution was added sodium hydride in oil (1.50 g), and the mixture was stirred at room temperature for 3 hours. The reaction solution was concentrated, and the residue was dissolved in ethyl acetate. The solution was washed with water and brine, dried and concentrated, and the residue was purified with column chromatography (ethyl acetate) to give colorless amorphous of the title compound (5.3 g).

Provenance & Evidence