Ethyl bromoacetate → HCID 474100、化合物

In 50 ml of dry acetonitrile was dissolved 5.0 g (11.5 mmol) of the imidazole (101e), followed by addition of 3.2 g (23.2 mmol) of potassium carbonate and 2.9 g (17.4 mmol) of ethyl bromoacetate, and the mixture was heated at 60° C. for 11 hours. The reaction mixture was diluted with ice-water and extracted with ethyl acetate. 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:n-hexane=1:2) to provide 5.75 g (yield 96%) of (2-(3-benzyloxypropyl)-5-(3,5-dichlorophenylthio)-4-isopropyl-1H-imidazol-1-yl)-ethyl acetate (136d) as oil.