Potassium Iodide → 1-acetylmethyl-5-(3,5-dichlorophenylthio)-4-isopropyl-2-(p-methoxybenzyloxymethyl)-1H-imidazole

Participants

Reaction Steps

(1)In acetone (2 ml)was dissolved 111 mg (1.20 mmol)of chloroacetone, followed by addition of 200 mg (1.2 mmol)of potassium iodide, and the mixture was stirred at room temperature for 15 minutes. Then, 437 mg (1.00 mmol)of 5-(3,5-dichlorophenylthio)-4-isopropyl-2-(p-methoxybenzyloxymethyl)-1H-imidazole (16b)and 170 mg (1.20 mmol)of potassium carbonate were added in order, and the mixture was stirred for 5 hours and was left overnight. This reaction mixture was concentrated under reduced pressure and the residue was extracted with methylene chloride. The organic layer was washed with water, dried over anhydrous sodium sulfate and the solvent was concentrated under reduced pressure. The residue was fractionated by silica gel chromatography (ethyl acetate:methylene chloride=1:9). The oil was crystallized from ether to provide 270 mg (yield 62%)of 1-acetylmethyl-5-(3,5-dichlorophenylthio)-4-isopropyl-2-(p-methoxybenzyloxymethyl)-1H-imidazole (17v). mp 87-90° C.

Provenance & Evidence