反应详情

Acetic acid (2.9 mL, 50 mmol) was added to a solution of n-propylhydrazine oxalate (5.0 g, 30 mmol) in water (100 mL). This mixture was added to a solution of pyruvaldehyde (4.39 g, 3.96 mL, 24.4 mmol) in water (500 mL). The solution was stirred at room temperature overnight. The aqueous phase was extracted with CH2Cl2 (4×) and the combined organic extracts were washed with saturated aqueous NaHCO3, dried over Na2SO4, filtered and concentrated to afford 2-oxopropanal propylhydrazone (3.74 g, 96%).

1. extractionThe aqueous phase was extracted with CH2Cl2 (4×)
2. washthe combined organic extracts were washed with saturated aqueous NaHCO3
3. dry with materialdried over Na2SO4
4. filtrationfiltered
5. concentrationconcentrated