反应详情

The compound (688 mg) obtained in Step 4 was suspended in 6N aqueous hydrochloric acid solution (10 ml), and sodium nitrite (1.41 g) was added in several portions with stirring at room temperature, and the mixture was further stirred at room temperature for 1 hr. Water was added, with stirring at room temperature, and the solid was collected by filtration, washed with water, and dried to give the title compound (571 mg).

1. stirringthe mixture was further stirred at room temperature for 1 hr
2. stirringwith stirring at room temperature
3. filtrationthe solid was collected by filtration
4. washwashed with water
5. customdried