Dimethylformamide → 4(3H)-Pyrimidinone, 2-chloro-3-methyl-6-(4-pyridinyl)-

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Reaction Steps

Phosphorous oxychloride (26.11 g, 170 mmol) was added to dimethyl-formamide (180 ml) and stirred 20 min. 2-Mercapto-3-methyl-6-(4-pyridyl)-pyrimidine-4-one (24.15 g, 110 mmol) was added to the solution and stirred 5 min and then stirred at 70° C. for 2 hours. Ethyl acetate (630 ml) was added to the ice-cooled solution and precipitate was collected by filtration after stirring for 20 minutes. After drying, the precipitate was dissolved in water (400 ml) and pH was adjusted to 10 by using aqueous sodium hydroxide. The precipitate was washed with water, filtered and dried to give the title compound (18.82 g, 77%).

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