反应详情

To a freshly prepared solution of sodium ethoxide (18 g of sodium metal was dissolved in 1 L of ethanol), was added ethyl benzoyl acetate (75 g, 0.39 mol) and the mixture was stirred at room temperature for 30 min. To this was added acetamidine hydrochloride (37 g, 0.39 mol) in portions and the mixture was refluxed for 24 h under nitrogen. The reaction mixture was cooled and excess ethanol was removed under vacuum. The residue was acidified to pH=4 with 1.5N HCl and the precipitate was filtered and dried under suction to afford 15 g (21%) of the titled compound as a white solid.

1. temperaturethe mixture was refluxed for 24 h under nitrogen
2. temperatureThe reaction mixture was cooled
3. customexcess ethanol was removed under vacuum
4. filtrationthe precipitate was filtered
5. customdried under suction