反应详情

温度

60 °C

To a solution of 4 g 2-[5-(5-Chloro-thiophen-2-yl)-isoxazol-3-ylmethyl]-5-thiophen-2-yl-2H-pyrazole-3-carboxylic acid ethyl ester in 20 ml THF, 10 ml water and 500 mg lithium hydroxide monohydrate were added. After stirring for 2 h at 60° C. the reaction was cooled to RT. The mixture was acidified with half concentrated hydrochloric acid to pH 3 and the precipitate collected by filtration and washed with 10 ml water The product was obtained as a white solid which was dried under reduced pressure.

1. temperaturewas cooled to RT
2. filtrationthe precipitate collected by filtration
3. washwashed with 10 ml water The product
4. customwas obtained as a white solid which
5. customwas dried under reduced pressure