反应详情

2.5 mL (30.1 mmol) of pyrrolidine were added to a room temperature (about 25° C.) solution of 5.30 g (30.1 mmol) of 7-methoxy-1-tetraione and 4.55 g (30.1 mmol) of 3-nitrobenzaldehyde in 25 mL methanol. The reaction flask was fitted with a soxhlet extractor containing a thimble filled with 3 Å molecular sieves and a reflux condenser was placed on top of the soxhlet extractor. The reaction mixture was heated to reflux under N2 for 18 hours, cooled to room temperature and filtered. The precipitate was washed twice with CH3OH, and then dried on the funnel for 24 hours to yield 6.62 g of light tan powder. (71% yield).

1. customThe reaction flask was fitted with a soxhlet extractor
2. additioncontaining a thimble
3. additionfilled with 3 Å molecular sieves and a reflux condenser
4. temperatureThe reaction mixture was heated
5. temperatureto reflux under N2 for 18 hours
6. filtrationfiltered
7. washThe precipitate was washed twice with CH3OH
8. customdried on the funnel for 24 hours
9. customto yield 6.62 g of light tan powder