Methyl isothiocyanate → 5-(3,5-Dichlorophenylthio)-4-isopropyl-1-methyl-2-(N-methylthiocarbamoyl)oxymethyl-1H-imidazole

Participants

Reaction Steps

To a dry tetrahydrofuran-dimethylformamide (1:1 v/v, 1 ml) solution of 50 mg (0.15 mmol) of [5-(3,5-dichlorophenylthio)-4-isopropyl-1-methyl-1H-imidazol-2-yl]-methanol (Compound I-8) was added 6.6 mg (0.17 mmol) of 60% sodium hydride under nitrogen atomosphere, and the mixture was stirred at room temperature for 30 minutes. Then, 22 mg (0.3 mmol) of methylisothiocyanate was added under ice-cooling. The mixture was stirred at the same temperature for 30 minutes, and at room temperature for 30 minutes. To the reaction mixture, an aqueous ammonium chloride solution was added to terminate the reaction. The mixture was extracted with diethyl ether. The organic layer was washed with saturated brine and dried over magnesium sulfate. The solvent was concentrated under reduced pressure, and the residue was purified by silica gel chromatography (ethyl acetate:n-hexane=1:1) to give 37 mg of 5-(3,5-dichlorophenylthio)-4-isopropyl-1-methyl-2-(N-methylthiocarbamoyl)oxymethyl-1H-imidazole (Compound I-44) (yield 60%). mp 119-121° C.

Provenance & Evidence