[CH3:1][CH:2]([C:4]1[N:9]=[CH:8][C:7]([OH:10])=[CH:6][N:5]=1)[CH3:3].C(=O)([O-])[O-].[K+].[K+].[P:17](=[S:25])(Cl)([O:21][CH2:22][CH3:23])[O:18][CH2:19][CH3:20].[H][H]>C(#N)C>[P:17](=[S:25])([O:10][C:7]1[CH:6]=[N:5][C:4]([CH:2]([CH3:3])[CH3:1])=[N:9][CH:8]=1)([O:21][CH2:22][CH3:23])[O:18][CH2:19][CH3:20]
To a stirred mixture of 166 grams of 2-(1-methylethyl)-5-pyrimidinol, 230 grams of finely powdered potassium carbonate and 1400 ml of acetonitrile was added in a slow stream 226 grams of O,O-diethyl phosphorochloridothioate. The mixture warmed to 55°. Stirring was continued until no more O,O-diethyl phosphorochloridothioate could be detected by GLC. The solids present were removed by filtration, the filtrate concentrated under vacuum, the residue taken up in diethyl ether, the ether solution washed twice with 2% aqueous sodium hydroxide, and once with saturated sodium chloride solution and dried over anhydrous sodium sulfate. The ether was removed under vacuum leaving a pale yellow oil having a refractive index at 25° of 1.4944. On elemental analysis the product was found to contain 45.68% carbon; 6.54% hydrogen and 9.57% nitrogen. Theoretical is 45.50% carbon; 6.60% hydrogen and 9.65% nitrogen.
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