反应详情

To a solution of methyl 3-amino-4-propylbenzoate (5.07 g) in acetic acid (150 ml) was dropwise added a solution of sodium nitrite (2.07 g) in water (5 ml) for 5 min. After stirring for 20 min, the reaction mixture was concentrated, and then toluene and a saturated aqueous sodium hydrogencarbonate solution were added to the residue. The separated toluene layer was dried over sodium sulfate and concentrated. The residue was allowed to stand and partially solidified. The solid was washed with hexane and dried to give the object compound (2.44 g) as a brown solid.

1. concentrationthe reaction mixture was concentrated
2. additiontoluene and a saturated aqueous sodium hydrogencarbonate solution were added to the residue
3. dry with materialThe separated toluene layer was dried over sodium sulfate
4. concentrationconcentrated
5. washThe solid was washed with hexane
6. customdried