反应详情

A mixture of ethyl(E)-3-[1-[4-(5-methyl-2-phenyl-4-oxazolylmethoxy)benzyl]-1H-pyrazol-4-yl]propenoate (1.78 g), 5% palladium-carbon (2.0 g), ethanol (20 ml), and tetrahydrofuran (20 ml) was stirred at room temperature for one hour under a hydrogen atmosphere. After removal of the catalyst by filtration, the filtrate was concentrated. The residue was subjected to silica gel column chromatography, and ethyl 3-[1-[4-(5-methyl-2-phenyl-4-oxazolylmethoxy)benzyl]-1H-pyrazol-4-yl]propionate (1.57 g, yield: 88%) was obtained as a colorless oily substance from the fraction eluted with ethyl acetate-hexane (1:1, volume ratio).

1. customAfter removal of the catalyst
2. filtrationby filtration
3. concentrationthe filtrate was concentrated