反应详情

To a solution of 1-(8-ethyl-1,4-dioxaspiro[4.4]nonan-7-yl)-6-((2-(trimethylsilyl)ethoxy)methyl)-6H-pyrrolo[2,3-e][1,2,4]triazolo[4,3-a]pyrazine (3.87 g, 8.72 mmol) in THF (30 mL), was added aqueous HCl (1N, 26.2 mL) at about 0° C. The ice bath was removed and the reaction was stirred at ambient temperature for about 6 h. THF was removed under reduced pressure. The aqueous phase was neutralized by the addition of saturated aqueous NaHCO3 and was extracted with EtOAc (2×50 mL). The combined organic extracts were washed with brine (60 mL), dried over anhydrous MgSO4, filtered, and concentrated. The residue was purified by silica gel column chromatography using 20 to 80% EtOAc in DCM to yield 3-ethyl-4-(6-((2-(trimethylsilyl)ethoxy)methyl)-6H-pyrrolo[2,3-e][1,2,4]triazolo[4,3-a]pyrazin-1-yl)cyclopentanone (2.84 g, 81%) as a yellow amorphous solid. LC/MS (Table 1, Method a) Rt=2.44 min; MS m/z: 400 (M+H)+.

1. customThe ice bath was removed
2. customTHF was removed under reduced pressure
3. additionThe aqueous phase was neutralized by the addition of saturated aqueous NaHCO3
4. extractionwas extracted with EtOAc (2×50 mL)
5. washThe combined organic extracts were washed with brine (60 mL)
6. dry with materialdried over anhydrous MgSO4
7. filtrationfiltered
8. concentrationconcentrated
9. customThe residue was purified by silica gel column chromatography