Water → HCID 54222598, Verbindung

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

Step 1): A solution of 4,5-diphenylimidazole (2.5 g, 11.3 mmol) in dry DMF (20 ml) was added to a suspension of NaH (0.33 g, 13.8 mmol) in dry DMF (5 ml) at 50° C. under nitrogen atmosphere. The reaction mixture was heated at 60° C. for 2 hours. After heating, the mixture was added dropwise to a solution of 1-bromo-2-chloroethane (4.9 g, 33.9 mmol) in dry DMF (30 ml) over 1 hour at 50° C. The reaction mixture was heated continuously at 40° C. for 5 hours, then poured into water and extracted with ethyl acetate. The organic layer was washed with water, dried (MgSO4) and concentrated. The precipitates were filtered off. The filtrate was concentrated. The residue was purified by column chromatography on silica gel (ethyl acetate and hexane) to give 1-(2-chloroethyl)-4,5-diphenylimidazole (17.7%).

Herkunft & Nachweise