反应详情

温度

2.5 °C

To a suspension of benzo[d]thiazole-2-carbohydrazide (9.3 g, 48.2 mmol) in aqueous HCl (1 N, 75 mL, 75 mmol) and water (200 mL) was added a solution of NaNO2 (6.9 g, 100 mmol) in water (50 mL) dropwise at 0-5° C. The mixture was stirred at 0-5° C. for 2 h and RT for 2 h. The precipitate was filtered, washed with cold water, and dried under high vacuum to give benzo[d]thiazole-2-carbonyl azide (9.0 g, 92%). LRMS (M+H+) m/z 205.1.

1. filtrationThe precipitate was filtered
2. washwashed with cold water
3. customdried under high vacuum