反应详情

温度

105 °C

To a suspension of 4-hydroxy-1-phenyl-3-(2-phenylpropionyl)-1,8-naphthyridin-2(1H)-one (370 mg, 1.0 mmol) produced in Synthesis Example 8 in DMF (8 mL) was added hydrazine monohydrate (purity of 80%, 160 μL), and the mixture was stirred at 100 to 110° C. for 3 hours. To the reaction solution was added water. The resulting precipitate was separated by filtration, washed with water, and dried to give 5-phenyl-3-(1-phenylethyl)-1H-pyrazolo[4,3-c][1,8]naphthyridin-4(5H)-one as a form of crystal (306 mg, yield 84%).

1. customThe resulting precipitate was separated by filtration
2. washwashed with water
3. customdried