反应详情

The product obtained in Step 1 (3.0 g) was suspended in 30 ml of ethanol at room temperature. Hydrazine monohydrate (3.17 g) was added dropwise to this suspension and the mixture was refluxed for two hours. After cooling to room temperature, the formed crystals were collected by filtration and washed with 20 ml of ethanol, giving 2.6 g of the objective compound as red crystals.

1. temperaturethe mixture was refluxed for two hours
2. filtrationthe formed crystals were collected by filtration
3. washwashed with 20 ml of ethanol