反应详情

Tin dichloride (12.24 g, 54.2 mmol) was added to a solution of 2,3-dimethyl-4-nitrobenzonitrile (2.73 g, 15.5 mmol) in ethanol (94 ml) at room temperature, and the reaction was carried out for 5 hours under reflux conditions. After cooling, the reaction mixture was concentrated, and the resulting residue was diluted with ethyl acetate and then washed with a saturated aqueous sodium hydrogencarbonate solution. After the insoluble material was filtered off, the filtrate was separated and the organic layer was washed with a saturated aqueous sodium chloride solution. The organic layer was dried over magnesium sulfate and distilled to remove the solvent, whereby 4-amino-2,3-dimethylbenzonitrile (2.12 g, 93.6%) was obtained.

1. temperatureAfter cooling
2. concentrationthe reaction mixture was concentrated
3. additionthe resulting residue was diluted with ethyl acetate
4. washwashed with a saturated aqueous sodium hydrogencarbonate solution
5. filtrationAfter the insoluble material was filtered off
6. customthe filtrate was separated
7. washthe organic layer was washed with a saturated aqueous sodium chloride solution
8. dry with materialThe organic layer was dried over magnesium sulfate
9. distillationdistilled
10. customto remove the solvent