反应详情

温度

80 °C

2-Phenyl-4-quinolone-6-carboxylic acid (1.3 grams) obtained in Example 2 is dissolved in 80 ml of ethanol and 0.5 ml of concentrated sulfuric acid. The solution is stirred for three days at 80° C., water is added thereto, crystals which separate out therefrom are collected by filtration. These are washed with water and dried to give 1.4 grams of ethyl 2-phenyl-4-quinolone-6-carboxylate, colorless powder, melting at above 300° C.

1. customcrystals which separate out
2. filtrationtherefrom are collected by filtration
3. washThese are washed with water
4. customdried