m-Chloroperbenzoic acid → HCID 68649789, compound

Participants

Reaction Steps

To a solution of 8-[4-(2-butoxyethoxy)phenyl]-1-propyl-N-[4-[[[1-propylimidazol-2-yl]methyl]sulfanyl]phenyl]-1,2,3,4-tetrahydro-1-benzoazocine-5-carboxamide (430 mg) in dichloromethane (10 ml) was added dropwise a 70% solution of 3-chloro-per-benzoic acid (238 mg) in dichloromethane (10 ml) at −78° C. After stirring as such for 1 hour, the dry ice-acetone bath was removed, and an aqueous sodium thiosulfate solution was added with vigorous stirring. The mixture was returned to room temperature and stirred for 30 minutes, after which water was added and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated aqueous sodium bicarbonate solution and saturated aqueous brine, and was dried with magnesium sulfate. The solvent was distilled off under reduced pressure, and the resulting residue was separated and purified with basic silica gel column chromatography (hexane:ethyl acetate=1:4→ethyl acetate) and re-crystallized from diisopropyl ether-ethyl acetate to give 8-[4-(2-butoxyethoxy)phenyl]-1-propyl-N-[4-[[[1-propylimidazol-2-yl]methyl]sulfinyl]phenyl]-1,2,3,4-tetrahydro-1-benzoazocine-5-carboxamide (288 mg) as yellow crystals (Compound 20).

Provenance & Evidence