反应详情

Trimethylsilyl cyanide (1.53 mL) was added to a solution of 2-isopropylpyridine 1-oxide (example 85, step b) (1.3 g) in DCM (40 mL) and the resulting mixture was stirred for 5 min. Diethylcarbamoyl chloride (1.2 mL) was added and the mixture stirred for 3 days. An aqueous solution of potassium carbonate (10%, 40 mL) was added and the mixture stirred for 10 min. The layers were separated and the aqueous phase extracted with DCM (2×40 mL). The combined organic solutions were washed with brine (40 mL), dried over sodium sulphate, filtered and evaporated. Purification was by silica gel chromatography eluting with 3:1 isohexane:ethyl acetate. The fractions containing product were combined and evaporated to give the subtitled compound as a clear oil. Yield 1.23 g.

1. stirringthe mixture stirred for 3 days
2. stirringthe mixture stirred for 10 min
3. customThe layers were separated
4. extractionthe aqueous phase extracted with DCM (2×40 mL)
5. washThe combined organic solutions were washed with brine (40 mL)
6. dry with materialdried over sodium sulphate
7. filtrationfiltered
8. customevaporated
9. customPurification
10. washeluting with 3:1 isohexane
11. additionThe fractions containing product
12. customevaporated