反应详情

温度

100 °C

To 5-bromo-2-chloro-4-(methylthio)pyrimidine (3 g, 12.53 mmol) in dioxane (12.53 mL) was added 2-methylpropan-2-amine (7.93 mL, 75 mmol). The mixture was stirred at 100° C. overnight in a sealed vessel. The solvent was removed under reduced pressure and the residue was dissolved in 100 mL ethyl acetate and washed with 50 mL of a 1M aqueous solution of sodium hydrogen phosphate. The aqueous layer was back-extracted with 50 mL ethyl acetate. The combined organic layers were dried over anhydrous magnesium sulfate, filtered and concentrated to give 5-bromo-N-tert-butyl-4-(methylthio)pyrimidin-2-amine (3.4 g, 12.31 mmol, 98% yield) as a solid. 1H NMR (400 MHz, DMSO-d6) δ ppm 8.61-8.72 (m, 1H), 8.08 (s, 1H), 6.95-7.17 (m, 1H), 2.48 (s, 2H), 1.38 (s, 9H). MS (ESI) m/z 276.0 [M+1]+ and 278.2 [M+1]+.

1. customThe solvent was removed under reduced pressure
2. dissolutionthe residue was dissolved in 100 mL ethyl acetate
3. washwashed with 50 mL of a 1M aqueous solution of sodium hydrogen phosphate
4. extractionThe aqueous layer was back-extracted with 50 mL ethyl acetate
5. dry with materialThe combined organic layers were dried over anhydrous magnesium sulfate
6. filtrationfiltered
7. concentrationconcentrated