Dimethyl Sulfate → HCID 22130857、化合物

In 25 ml of dry acetonitrile was dissolved 5.0 g (11.5 mmol) of imidazole (101e), followed by addition of 1.7 g (23 ml) of lithium carbonate and 2.2 g (17.4 mmol) of dimethyl sulfate. The mixture was stirred under heating at 70° C. for 2 hours. The reactLion mixture was diluted with ice-water and extracted with diethyl ether. The extract was washed with water, dried over sodium sulfate, filtered, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (ethyl acetate) to provide 3.1 g (yield 60%) of 2-(3-benzyloxypropyl)-5-(3,5-dichlorophenyl-thio)-4-isopropyl-1-methyl-1H-imidazole (136a) as oil.