反应详情

To 9-carbamoyl-11H-pyrrolo[2,1-b][3]benzazepin-11-one (27 g., 0.112 moles) in 300 ml. of 50% sulfuric acid maintained at 50° C. is added slowly 25 g. of sodium nitrite in 75 ml. of water. At the end of the addition, the solid is filtered, washed with water and air-dried to yield 9-carboxy-11H-pyrrolo[2,1-b][3]benzazepin-11-one.

1. additionis added slowly 25 g
2. additionAt the end of the addition
3. filtrationthe solid is filtered
4. washwashed with water
5. customair-dried