1-{1-benzyl-3-[(4-{[2-(2-furyl)-5-methyl-1,3-oxazol-4-yl]methoxy}-3-methoxybenzyl)oxy]-1H-pyrazol-4-yl}-1-ethanol → 1-{1-benzyl-3-[(4-{[2-(2-furyl)-5-methyl-1,3-oxazol-4-yl]methoxy}-3-methoxybenzyl)oxy]-1H-pyrazol-4-yl}-1-ethanone

Participants

Reaction Steps

A mixture of 1-{1-benzyl-3-[(4-{[2-(2-furyl)-5-methyl-1,3-oxazol-4-yl]methoxy}-3-methoxybenzyl)oxy]-1H-pyrazol-4-yl}-1-ethanol (0.15 g), activated manganese dioxide (0.50 g) and tetrahydrofuran (50 mL) was stirred at room temperature for 4 days. Manganese dioxide was removed by filtration, and the filtrate was concentrated. The obtained crystals were collected by filtration to give 1-{1-benzyl-3-[(4-{[2-(2-furyl)-5-methyl-1,3-oxazol-4-yl]methoxy}-3-methoxybenzyl)oxy]-1H-pyrazol-4-yl}-1-ethanone (0.13 g, yield 87%). Recrystallization from ethyl acetate-hexane gave colorless prism crystals. melting point: 144-145° C.

Provenance & Evidence