反应详情

7-Methoxy-4-chromanone (7 g) was added to trimethylsilyl cyanide (TMSCN) (7 ml), CH3CN (10 ml) and a catalytic amount of ZnIhd 2 and refluxed for 2 hrs. The reaction was cooled, evaporated to dryness, then isopropyl alcohol saturated with HCl(g) (100 ml) was added and this solution refluxed 2 hrs. The reaction was cooled, evaporated to dryness, and saturated aqueous NaCl added. This was then extracted with CH2Cl2, the organic layer separated, dried (Na2SO4), filtered and evaporated affording 7.1 g of product IR(CHCl3) 2218 cm-1 :

1. temperaturea catalytic amount of ZnIhd 2 and refluxed for 2 hrs
2. temperatureThe reaction was cooled
3. customevaporated to dryness
4. additionisopropyl alcohol saturated with HCl(g) (100 ml) was added
5. temperaturethis solution refluxed 2 hrs
6. temperatureThe reaction was cooled
7. customevaporated to dryness, and saturated aqueous NaCl
8. additionadded
9. extractionThis was then extracted with CH2Cl2
10. customthe organic layer separated
11. dry with materialdried (Na2SO4)
12. filtrationfiltered
13. customevaporated