[Cl:1][C:2]1[N:7]=C2N[C:9](=O)[CH2:10][C:5]2=[CH:4][CH:3]=1.[H-].[Na+].I[CH3:15].O.[CH3:17][N:18]([CH:20]=[O:21])[CH3:19]>[Cl-].[Na+].O.CCOC(C)=O>[Cl:1][C:2]1[N:7]=[C:17]2[N:18]([CH3:19])[C:20](=[O:21])[C:10]([CH3:9])([CH3:15])[C:5]2=[CH:4][CH:3]=1To a solution of 6-chloro-1H-pyrrolo[2,3-b]pyridin-2(3H)-one (50 mg, 0.30 mmol) in DMF (1 mL) at 0° C. was added NaH (48 mg, 1.2 mmol, 60%), and the reaction was stirred for 5 minutes. Iodomethane (210 mg, 1.5 mmol) was added and the reaction became a thick slurry. DMF (0.5 mL) was added and the reaction was stirred at room temperature for 90 minutes. Water, EtOAc, and brine were added, the layers were separated and the organic layer was washed with brine. The organics were dried over MgSO4, filtered and concentrated to afford 6-chloro-1,3,3-trimethyl-1H-pyrrolo[2,3-b]pyridin-2(3H)-one 7.28 which was used without further purification. LCMS-ESI+ (m/z): [M+H]+ calcd for C10H12ClN2O: 211.1; found: 211.0.
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