反应详情

A round bottom flask was charged with 3-ethyl-4-(6-((2-(trimethylsilyl)ethoxy)methyl)-6H-pyrrolo[2,3-e][1,2,4]triazolo[4,3-a]pyrazin-1-yl)cyclopentyl methanesulfonate (0.83 g, 1.7 mmol, Preparation #IIII.1) and DMF (7.0 mL). To the reaction flask was added sodium azide (0.56 g, 8.6 mmol). The mixture was stirred at ambient temperature for about 20 h. Another portion of sodium azide (0.056 g, 0.86 mmol) was added and the reaction was stirred for about 2 h. The reaction was partitioned between EtOAc (20 mL) and water (20 mL). The layers were separated and the organic solution was dried over anhydrous MgSO4, filtered, and concentrated under reduced pressure to give 1-(-4-azido-2-ethylcyclopentyl)-6-((2-(trimethylsilyl)ethoxy)methyl)-6H-pyrrolo[2,3-e][1,2,4]triazolo[4,3-a]pyrazine (0.65 g, 88%) as a brown oil: LC/MS (Table 1, Method b) Rt=2.85 min; MS m/z: 427 (M+H)+.

1. stirringthe reaction was stirred for about 2 h
2. customThe reaction was partitioned between EtOAc (20 mL) and water (20 mL)
3. customThe layers were separated
4. dry with materialthe organic solution was dried over anhydrous MgSO4
5. filtrationfiltered
6. concentrationconcentrated under reduced pressure