反应详情

240 mg (60% in oil; 6 mmol) of sodium hydride are added to a solution of 1.43 g (12 mmol) of 2-hydroxybenzonitrile in 10 ml of dimethylformamide. The mixture is stirred at room temperature for 1 hour under nitrogen. 200 mg (1.2 mmol) of 4-(2-chloroethyl)-1H-imidazole hydrochloride and tetrabutylammonium iodide (catalytic amount) are added and the mixture is heated at 80° C. for 3 days. The solvent is evaporated under reduced pressure and the oily residue is stirred in ethanol and filtered. The filtrate is evaporated and the residue subjected to chromatography on a column of silica gel (first eluent chloroform, second eluent 95/5 chloroform/methanol). The title compound is converted to the oxalate and crystallized from an ethanol/diethyl ether (2/1) mixture, M.p.: 170°-171° C.

1. temperaturethe mixture is heated at 80° C. for 3 days
2. customThe solvent is evaporated under reduced pressure
3. stirringthe oily residue is stirred in ethanol
4. filtrationfiltered
5. customThe filtrate is evaporated
6. customcrystallized from an ethanol/diethyl ether (2/1) mixture, M.p.: 170°-171° C.