反应详情

5-Bromo-2-nitrothiophene-3-carbaldehyde (22.5 g, 95 mmol), hydroxylamine hydrochloride (6.96 g, 100 mmol) and sodium acetate (8.21 g, 100 mmol) were stirred in ethanol (225 mL) at room temperature overnight. The solvent was removed in vacuo, saturated NaHCO3 was added and the products extracted into EtOAc (3×). The combined organic extracts were washed with brine, dried over MgSO4, filtered, and concentrated in vacuo to give the title compound as an orange solid.

1. customThe solvent was removed in vacuo, saturated NaHCO3
2. additionwas added
3. extractionthe products extracted into EtOAc (3×)
4. washThe combined organic extracts were washed with brine
5. dry with materialdried over MgSO4
6. filtrationfiltered
7. concentrationconcentrated in vacuo