反应详情

4-Methylpyrimidine-2-thiol (79.4 g. 488 mmol) was added to 1M aqueous sodium hydroxide (NaOH) (1.02 L, 1.02 mol). To the stirring mixture was added iodomethane (76.2 g, 540 mmol) and the reaction-stirred at room temperature overnight. The mixture was extracted with dichloromethane (3×300 mL). The organic phase was dried over magnesium sulfate and concentrated to yield 66.8 g (98%) of 4-methyl-2-(methylsulfanyl)pyrimidine. 1H NMR (CDCl3): δ 8.39 (d, 1H), 6.84 (d, 1H), 2.59 (s, 3H), 2.48 (s, 3H); MS m/z 141 (M+1).

1. extractionThe mixture was extracted with dichloromethane (3×300 mL)
2. dry with materialThe organic phase was dried over magnesium sulfate
3. concentrationconcentrated