反应详情

Phosphorous pentachloride (86 g) was added slowly to a stirred suspension of the above pivaloylmalononitrile intermediate (a) (57 g) in methylene chloride (500 ml) and was allowed to stir at room temperature for 16 hours. Sulfur dioxide was passed through the solution for 20 minutes and the solvent was removed on a rotary evaporator. The residue was poured onto ice and filtered. The product was used without further purification.

1. customthe solvent was removed on a rotary evaporator
2. additionThe residue was poured onto ice
3. filtrationfiltered
4. customThe product was used without further purification