反应详情

To a solution of ethyl (2E)-3-{4[(4-formyl-2-methoxyphenoxy)methyl]-5-methyl-1,3-oxazol-2-yl}-2-propenoate (11.94 g) in tetrahydrofuran (200 mL)-ethanol (20 mL) was gradually added sodium borohydride (650 mg) at 0° C. After stirring the reaction mixture for 1 hr, water was added, and the mixture was extracted with ethyl acetate. The organic layer was washed with water, dried over anhydrous magnesium sulfate and concentrated to give crystals of ethyl (2E)-3-{4[(4-hydroxymethyl-2-methoxyphenoxy)methyl]-5-methyl-1,3-oxazol-2-yl}-2-propenoate (11.0 g, yield 92%). Recrystallization from ethyl acetate-hexane gave colorless prism crystals. melting point: 96-97° C.

1. customat 0° C
2. extractionthe mixture was extracted with ethyl acetate
3. washThe organic layer was washed with water
4. dry with materialdried over anhydrous magnesium sulfate
5. concentrationconcentrated