反应详情

A mixture of 6-methyl-1,3-dihydro-benzoimidazol-2-one (0.30 g, 2.03 mmol) in 69% nitric acid (5 ml) was stirred over ice for 2 h. The yellow mixture was filtered and washed with water to give (22) as a bright yellow solid (0.39 g, 99.7%).

1. filtrationThe yellow mixture was filtered
2. washwashed with water