Make the pH of the mixed liquid system=10,Stir at room temperature for 40 minutes, TLC monitors the progress of the reaction,After full reaction,Add 40ml of water, stir and crystallize,Suction filtration, wash the filter cake with 20ml water,Dry the filter cake under reduced pressure,Then ...
Make the pH of the mixed liquid system=10,Stir at room temperature for 40 minutes, TLC monitors the progress of the reaction,After full reaction,Add 40ml of water, stir and crystallize,Suction filtration, wash the filter cake with 20ml water,Dry the filter cake under reduced pressure,Then ...
wash the filter cake with 20ml water,Dry the filter cake under reduced pressure,Then use a mixture of ethyl acetate and petroleum ether(1:2) or ethanol and water (1:2)The mixture is recrystallized,The white powder product Aphrana 1-2, (8.10g, yield 77%, purity 99.47%) was obtained. ...