反应详情

The nitro intermediate (10 mmol) obtained above was dissolved in MeOH (20 mL), and treated with SnCl22H2O (50 mmol), according to General Procedure I. The reaction mixture was heated under reflux until completion, as indicated by TLC or HPLC. The solvent was removed in vacuuo and the residue was treated with 4.0 N aqueous NaOH to pH ˜8. The residue was extracted with EtOAc (2×50 mL), washed with 1.0 N aqueous NaOH (50 mL), brine (50 mL) and dried over sodium sulfate. The solvent was removed in vacuuo to afford the desired 4-(2,4-dichloro-phenoxy)aniline, which was used directly for further transformation without further purification.

1. additiontreated with SnCl22H2O (50 mmol)
2. temperatureThe reaction mixture was heated
3. temperatureunder reflux until completion
4. customThe solvent was removed in vacuuo
5. additionthe residue was treated with 4.0 N aqueous NaOH to pH ˜8
6. extractionThe residue was extracted with EtOAc (2×50 mL)
7. washwashed with 1.0 N aqueous NaOH (50 mL), brine (50 mL)
8. dry with materialdried over sodium sulfate
9. customThe solvent was removed in vacuuo