[C:1]([C:5]1[CH:6]=[N:7][C:8](=O)[NH:9][CH:10]=1)([CH3:4])([CH3:3])[CH3:2].O=P(Cl)(Cl)[Cl:14]>>[C:1]([C:5]1[CH:6]=[N:7][C:8]([Cl:14])=[N:9][CH:10]=1)([CH3:4])([CH3:3])[CH3:2]200 mL POCl3 and 14 g (0.09 mol) 5-tert-butylpyrimidin-2(1H)-one are heated in a sealed glass ampoule for 3 h at 160° C. The mixture is cooled and the excess
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