反应详情

Sodium hydride (60% dispersion in mineral oil suspension, 4.00 g, 100 mmol) was added and washed with hexane twice. Into this flask, N,N-dimethylformamide (100 ml) was added and then a solution prepared by dissolving 4-amino-1,1,1-trifluoro-3-buten-2-one (13.9 g, 100 mmol) and 3-methoxyacrylonitrile (8.30 g, 100 mmol) in N,N-dimethylformamide (50 ml) was added dropwise under ice-cooling. After stirring the mixture at room temperature for 3 hours, the reaction mixture was poured into water (500 ml). This mixture was acidified with concentrated hydrochloric acid under ice-cooling, the precipitate was collected by filtration and then washed with cold water. The obtained precipitate was dried under reduced pressure to obtain 8.20 g (yield 43.1%) of a mixture of compounds (IIa) and (IIb).

1. washwashed with hexane twice
2. additionInto this flask, N,N-dimethylformamide (100 ml) was added
3. customa solution prepared
4. additionwas added dropwise under ice-
5. temperaturecooling
6. temperaturecooling
7. filtrationthe precipitate was collected by filtration
8. washwashed with cold water
9. customThe obtained precipitate was dried under reduced pressure