反应详情

To a solution of the compound (3.00 g) obtained in Step 6 in 6N hydrochloric acid (45 ml) was added sodium nitrite (8.76 g) in several portions with stirring at room temperature, and the mixture was further stirred at room temperature for 30 min. The precipitated crystals were collected by filtration, washed with water and dried to give the title compound (1.46 g).

1. stirringthe mixture was further stirred at room temperature for 30 min
2. filtrationThe precipitated crystals were collected by filtration
3. washwashed with water
4. customdried