反应详情

10 g (90 mmol) of semicarbazide hydrochloride, 15.5 g (82 mmol) of dimethyl 2,2-dimethyl-3-oxobutanedioate and 8.1 g (82 mmol) of sodium acetate were stirred in 135 ml of water at RT overnight and left to stand for two days. The mixture was cooled with ice-water, and the colourless precipitate was filtered off, washed with a little water and dried.

1. waitleft
2. filtrationthe colourless precipitate was filtered off
3. washwashed with a little water
4. customdried