Cl.[F:2][C:3]1[C:8]([C:9]2[C:10](=[O:16])[NH:11][C:12](=[O:15])[NH:13][CH:14]=2)=[CH:7][CH:6]=[C:5]([CH3:17])[N:4]=1.C([O-])([O-])=O.[K+].[K+].Br[CH2:25][CH2:26][CH:27]([O:30][CH3:31])[O:28][CH3:29]>CN(C=O)C>[CH3:29][O:28][CH:27]([O:30][CH3:31])[CH2:26][CH2:25][N:13]1[CH:14]=[C:9]([C:8]2[C:3]([F:2])=[N:4][C:5]([CH3:17])=[CH:6][CH:7]=2)[C:10](=[O:16])[NH:11][C:12]1=[O:15]A mixture of 5-(2-fluoro-6-methyl-pyridin-3-yl)-1H-pyrimidine-2,4-dione hydrochloride (Prep 15, 667 mg, 2.59 mmol), and K2CO3 (358 mg, 2.59 mmol) in DMF (25 ml) was stirred 30 minutes at room temperature. Then 90% 3-Bromo-1,1dimethoxy-propane (432 μl, 2.85 mmol) was added in three portions during 3 days. Solvent was then removed under vacuum at 40° C. and the residue washed with ethyl acetate. The organic phase was dried (Na2SO4), filtered and evaporated. The crude was purified by flash chromatography eluting with DCM-MeOH—NH4OH (98-2-0.2) to give 291 mg of the title compound as a white solid (35% yield).
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