反应详情

Oxone (Trade mark; potassium peroxymonosulfate: 28.8 g) was added to a suspension of 4-[4-[2-[(methylthio)methyl]-1H-imidazol-1-yl]butyl]phenol (8.64 g) in methanol-water (2:1) (150 ml) at 0° C. and the mixture was stirred at room temperature for 3.5 hr. The reaction mixture was adjusted to pH 6 by addition of 4N aqueous sodium hydroxide solution to precipitate crystals, which were collected by filtration. The crystals were dissolved in ethyl acetate-methanol (1:4), and the insoluble was filtered off. The filtrated was concentrated and recrystallized from ethyl acetate-methanol-hexane to give the titled compound (6.53 g) as colorless needle crystals.

1. customto precipitate crystals, which
2. filtrationwere collected by filtration
3. dissolutionThe crystals were dissolved in ethyl acetate-methanol (1:4)
4. filtrationthe insoluble was filtered off
5. concentrationThe filtrated was concentrated
6. customrecrystallized from ethyl acetate-methanol-hexane