反应详情

A mixture of [5-[(5-methyl-2-phenyl-4-oxazolyl)methoxy]-3-pyridyl]methanol (1.20 g), thionyl chloride (0.6 mL), tetrahydrofuran (20 mL) and toluene (20 mL) was stirred at room temperature for 2 hrs. The precipitated crystals were collected by filtration and washed with diisopropyl ether to give crude crystals. A mixture of the obtained crystals, methyl 2-(4-hydroxyphenyl)acetate (0.70 g), anhydrous potassium carbonate (0.92 g) and N,N-dimethylformamide (20 mL) was stirred overnight at 80° C. The reaction mixture was poured into water and extracted with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate and concentrated. The obtained residue was subjected to silica gel column chromatography to give methyl 2-[4-[5-[(5-methyl-2-phenyl-4-oxazolyl)methoxy]-3-pyridylmethoxy]phenyl]acetate as a pale-yellow oil (1.52 g, 0.84%) from a fraction eluted with ethyl acetate-hexane (1:1, v/v).

1. filtrationThe precipitated crystals were collected by filtration
2. washwashed with diisopropyl ether
3. customto give crude crystals
4. stirringwas stirred overnight at 80° C
5. extractionextracted with ethyl acetate
6. washThe organic layer was washed with saturated brine
7. dry with materialdried over anhydrous magnesium sulfate
8. concentrationconcentrated