反应详情

温度

115 °C

To a suspension of 4-hydroxy-3-(2-phenylpropionyl)-1-(3-trifluoromethoxyphenyl)-1,8-naphthyridin-2(1H)-one (276 mg, 0.61 mmol) produced in Synthesis Example 32 in DMF (3 mL) was added hydrazine monohydrate (purity of 80%, 100 μL), and the mixture was stirred at 110 to 120° C. for 2 hours. To the reaction solution was added a sodium hydrogencarbonate aqueous solution, and an oily substance was collected. To the oily substance was added isopropyl ether, and the mixture was heated. Then the resulting matter was allowed to stand to a room temperature for crystallization. The resulting crystal was separated by filtration and dried to give 3-(1-phenylethyl)-5-(3-trifluoromethoxyphenyl)-1H-pyrazolo[4,3-c][1,8]naphthyridin-4(5H)-one as a form of crystal (140 mg, yield 51%).

1. customan oily substance was collected
2. additionTo the oily substance was added isopropyl ether
3. temperaturethe mixture was heated
4. customto stand to a room temperature for crystallization
5. customThe resulting crystal was separated by filtration
6. customdried