[I:1][C:2]1[C:10]2[CH:9]=[N:8][CH:7]=[N:6][C:5]=2[NH:4][CH:3]=1.C(=O)([O-])[O-].[Cs+].[Cs+].I[CH:18]([CH3:20])[CH3:19].[Cl-].[NH4+]>CN(C=O)C>[I:1][C:2]1[C:10]2[CH:9]=[N:8][CH:7]=[N:6][C:5]=2[N:4]([CH:18]([CH3:20])[CH3:19])[CH:3]=1
To a mixture of 5-iodo-7H-pyrrolo[2,3-d]pyrimidine (Preparation 201, 2.90 g, 12.0 mmol) and cesium carbonate (5.78 g, 17.8 mmol) in DMF (45 mL) was added 2-iodopropane (1.78 mL, 17.8 mmol). The mixture was stirred at room temperature for 3 hours. The reaction mixture was then poured onto saturated aqueous ammonium chloride (500 mL) and a solid precipitated. The solid was collected by filtration, rinsed with water (200 mL) and dried under reduced pressure for 17 hours to afford the title compound as a brown solid in 77% yield, 2.61 g.
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