[CH3:1][NH:2][C:3]1[N:8]=[CH:7][NH:6][C:5](=[O:9])[CH:4]=1.[CH3:10][O:11][C:12]1[CH:19]=[CH:18][C:15]([CH2:16]Cl)=[CH:14][CH:13]=1.[I-].[K+].C(=O)([O-])[O-].[Cs+].[Cs+]>CN(C=O)C>[CH3:10][O:11][C:12]1[CH:19]=[CH:18][C:15]([CH2:16][N:6]2[C:5](=[O:9])[CH:4]=[C:3]([NH:2][CH3:1])[N:8]=[CH:7]2)=[CH:14][CH:13]=16-(Methylamino)pyrimidin-4(3H)-one (100 g, 800 mmol, 1 eq), p-methoxybenzyl chloride (124.8 g, 800 mmol, 1 eq), potassium iodide (13.3 g, 80 mmol, 0.1 eq) and cesium carbonate (260 g, 800 mmol, 1 eq) were stirred at RT in anhydrous DMF (1 L) for 8 hours. The DMF was removed in vacuo and the residue stirred overnight in 20% methanol/DCM. The solid was removed by filtration and washed with 20% methanol/DCM. The solvent was removed in vacuo and the resulting residue taken up in DCM then washed with water. The organic layer was dried over magnesium sulfate and evaporated to give 102 g of the title compound (59%). 1H NMR (400 MHz, DMSO-d6) δ ppm 2.63 (d, J=4.29 Hz, 3 H) 3.72 (s, 3 H) 4.87 (s, 2 H) 6.88 (d, J=8.84 Hz, 2 H) 7.25 (d, J=8.59 Hz, 2 H) 8.22 (s, 1 H). [M+H] calc'd for C13H15N3O2, 246; found, 246.
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