Reaktion #79576

Reaktionsgleichung

Imidazole-4-carboxaldehyde

sodium hydride

(2-Bromoethyl)benzene

→

title compound

1-(2-Phenylethyl)-1H-imidazole-4-carboxaldehyde

Lösungsmittel

tetrahydrofuran

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.STIRRINGthe mixture was stirred at room temperature for 72 hours
2. 2
   SonstigeThe mixture was evaporated under reduced pressure
3. 3
   Sonstigethe residue was partitioned between water (300 ml) and dichloromethane (500 ml)
4. 4
   Sonstigethe layers were separated
5. 5
   TrocknenThe organic phase was dried (MgSO4)
6. 6
   Sonstigeevaporated under reduced pressure
7. 7
   Sonstigepurified by column chromatography on silica gel using an elution gradient of ethyl acetate:pentane (50:50 to 100:0)

Vorschrift

Imidazole-4-carboxaldehyde (6.73 g, 70 mmol) was added portionwise to a suspension of sodium hydride (1.68 g, 60% dispersion in mineral oil, 70 mmol) in tetrahydrofuran (280 ml), and the mixture was then stirred at room temperature for 30 minutes. (2-Bromoethyl)benzene (9.56 ml, 70 mmol) was added, and the mixture was stirred at room temperature for 72 hours. The mixture was evaporated under reduced pressure and the residue was partitioned between water (300 ml) and dichloromethane (500 ml), and the layers were separated. The organic phase was dried (MgSO4) and evaporated under reduced pressure. The crude product was pre-adsorbed onto silica gel, and purified by column chromatography on silica gel using an elution gradient of ethyl acetate:pentane (50:50 to 100:0) to afford the title compound, 1.44 g. 1H-NMR (CDCl3, 400 MHz) δ: 3.16 (t, 2H), 4.23 (t, 2H), 7.02 (d, 2H), 7.28 (m, 3H), 7.36 (s, 1H), 7.50 (s, 1H), 9.83 (s, 1H). LRMS: m/z (ES+) 223 [MNa+].

Quelle