反应详情

To a mixture of ethyl (4-{4-[(4-hydroxymethyl-2-methoxyphenoxy)methyl]-5-methyl-1,3-oxazol-2-yl}phenyl)acetate (0.68 g) and toluene (50 mL) was added thionyl chloride (0.23 g), and the mixture was heated under reflux for 1 hr. After concentration of the reaction mixture, saturated aqueous sodium hydrogen carbonate was added to the residue and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, dried over anhydrous magnesium sulfate and concentrated to give ethyl (4-{4-[(4-chloromethyl-2-methoxyphenoxy)methyl]-5-methyl-1,3-oxazol-2-yl}phenyl)acetate as colorless crystals (0.58 g, yield 79%). Recrystallization from ethyl acetate-hexane gave colorless prism crystals. melting point: 121-122° C.

1. temperaturethe mixture was heated
2. temperatureunder reflux for 1 hr
3. extractionthe mixture was extracted with ethyl acetate
4. washThe organic layer was washed with saturated brine
5. dry with materialdried over anhydrous magnesium sulfate
6. concentrationconcentrated