反应详情

To a 50 ml three necked round bottom flask 6-(7-pivaloyl-5-((2-(trimethylsilyl)-ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazin-2-ylamino)-nicotinaldehyde (0.33 g, 0.00072 mole) and 2-cyano-N,N-dimethylacetamide (0.245 g, 0.00218 mole) was taken in ethanol (10 ml). To this reaction mixture, piperidine acetate (3.3 M solution in water) (0.1 ml) was added drop wise at RT. After completion of the addition, reaction mixture was refluxed for 4 hrs. After completion of the reaction, the ethanol was distilled out and water was added to residue. The aqueous layer was extracted with ethyl acetate and organic layers were combined, dried over Na2SO4, filtered and concentrated to afford crude product. The crude compound was purified by triturated with n-pentane (10.0 ml), pentane layer was decanted and solid was dried under vacuum to yield 0.35 g of 2-cyano-N,N-dimethyl-3-(6-(7-pivaloyl-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazin-2-ylamino)pyridin-3-yl)acrylamide.

1. additionAfter completion of the addition, reaction mixture
2. temperaturewas refluxed for 4 hrs
3. customAfter completion of the reaction
4. distillationthe ethanol was distilled out and water
5. additionwas added to residue
6. extractionThe aqueous layer was extracted with ethyl acetate and organic layers
7. dry with materialdried over Na2SO4
8. filtrationfiltered
9. concentrationconcentrated
10. customto afford crude product
11. customThe crude compound was purified
12. customby triturated with n-pentane (10.0 ml), pentane layer
13. customwas decanted
14. customsolid was dried under vacuum