反应详情

温度

90 °C

Concentrated sulfuric acid (5 mL) was added to 2-[2-hydroxy-2-(5-methyl-3-phenyl-isoxazol-4-yl)-ethyl]-4-methyl-thiazole-5-carboxylic acid methyl ester (200 mg, 0.56 mmol) then the mixture was heated at 90° C. for 10 min. The solution was carefully dropped into saturated sodium bicarbonate solution (100 mL) then extracted with ether. The combined organic extracts were dried, filtered and concentrated, to give the title compound (160 mg, 84%) as a yellow oil which solidified on standing to a yellow solid. This material was used directly without further purification. MS: m/e=341.1 [M+H]+.

1. extractionthen extracted with ether
2. customThe combined organic extracts were dried
3. filtrationfiltered
4. concentrationconcentrated