反应详情

温度

130 °C

[2-(4-Carbamoyl-phenoxy)-ethyl]-carbamic acid benzyl ester (322 mg, 1.02 mmol) and 1-bromo-2,2-dimethoxypropane (3.8 g, 20.4 mmol) were combined in a round-bottomed flask and heated to about 130° C. for about thirty minutes. The reaction mixture was then cooled to room temperature and poured into water. The mixture was extracted with ethyl acetate, the combined extracts dried over magnesium sulfate, filtered, and concentrated in vacuo. The resulting crude material was purified by column chromatography (1:1 hexanes/ethyl acetate) to afford the desired oxazole product (167 mg, 47% yield). LRMS ([M+H]+)=353.1.

1. temperatureThe reaction mixture was then cooled to room temperature
2. extractionThe mixture was extracted with ethyl acetate
3. dry with materialthe combined extracts dried over magnesium sulfate
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customThe resulting crude material was purified by column chromatography (1:1 hexanes/ethyl acetate)