反应详情

0.55 g of ethyl 1-methyl-5-phenyl-1H-3-pyrazolecarboxylate was dissolved in 10 ml ethanol. 2 ml of 5N aqueous sodium hydroxide solution was added thereto, followed by heating under reflux for 1 hour. The reaction mixture was ice-cooled, neutralized with 2N hydrochloric acid and then extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous magnesium sulfate and evaporated, to give 0.5 g of 1-methyl-5-phenyl-1H-3-pyrazolecarboxylic acid.

1. temperatureby heating
2. temperatureunder reflux for 1 hour
3. temperaturecooled
4. extractionextracted with ethyl acetate
5. washThe organic layer was washed with brine
6. dry with materialdried over anhydrous magnesium sulfate
7. customevaporated