HCID 68983444, compound → HCID 68981606, compound

Participants

Reaction Steps

The above compound was also obtained by the following method. A 10 g quantity of 2-(3-benzyloxy-4-methoxyphenyl-4-chloromethyloxazole obtained in Reference Example 5 and 5.4 g of 1-(2-isopropoxyphenyl)ethanone were dissolved in 100 ml of tetrahydrofuran, and 2.42 g of sodium hydride was added thereto. After foaming, the reaction mixture was heated and refluxed for 3 hours. After cooling, the reaction mixture was added to ice water, and extraction was performed with ethyl acetate. The organic layer was washed with water, dried over magnesium sulfate, and then concentrated under reduced pressure. The residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=3:1) to give 4.30 g of pale yellow oily 3-[2-(3-benzyloxy-4-methoxyphenyl)oxazol-4-yl]-1-(2-isopropoxyphenyl)propan-1-one. Subsequently, 1.84 g of the obtained 3-[2-(3-benzyloxy-4-methoxyphenyl)oxazol-4-yl]-1-(2-isopropoxyphenyl)propan-1-one was dissolved in 100 ml of methanol. An 800 mg quantity of 10% palladium-carbon powder was added thereto. The mixture was stirred under a hydrogen atmosphere at room temperature for 1 hour. The catalyst was removed by filtration, and the solvent was removed. The residue was then recrystallized from acetone/diisopropyl ether to give 1.15 g of 3-[2-(3-hydroxy-4-methoxyphenyl)oxazol-4-yl]-1-(2-isopropoxyphenyl)propan-1-one.

Provenance & Evidence