m-Chloroperbenzoic acid → HCID 70186183, compound

Participants

Reaction Steps

A solution of 2-[(3,4-dihydro-5-ethoxycarbonylmethoxy-2-naphthyl)methyl]-6-diphenylmethyl-3(2H)-pyridazinone (0.20 g) and 3-chloroperoxybenzoic acid (94 mg) in dichloromethane (5 ml) was allowed to stand in a freezer (about -15° C.) for overnight. The reaction mixture was evaporated in vacuo and the residue was partitioned between ethyl acetate and sodium hydrogencarbonate solution. The organic layer was separated and washed with water, brine, dried over magnesium sulfate and evaporated in vacuo. The residue and 10% palladium on carbon in ethyl acetate (5 ml) and acetic acid (one drop) were stirred under hydrogen (1 atm) at room temperature for 4 hours. The catalyst was filtered off and the filtrate was evaporated in vacuo. The residue was purified by silica gel column chromatography (n-hexane -ethyl acetate=2:1~1:1) to give 2-[(1,2,3,4-tetrahydro-5-ethoxycarbonylmethoxy-2-hydroxy-2-naphthyl)methyl]-6-diphenylmethyl-3(2H)-pyridazinone (0.08 g) as a pale yellow oil.

Provenance & Evidence