反应详情

N2-(4-Amino-phenyl)-5-bromo-N4-[2-(3H-imidazol-4-yl)-ethyl]-pyrimidine-2,4-diamine (1 g, 2.6 mmole, prepared according to procedure 21) was dissolved in MeOH (10 ml), butanal (2.6 ml, 2.9 mmole) was added at room temperature and the reaction mixture was stirred at room temperature for 20 minutes. Sodium cyanoborohydride (266 mg, 3.6 mmole) was added and the reaction mixture was stirred at room temperature overnight. After extraction with ethylacetate/bicarbonate solution (3×) the combined organic layers were washed with saturated NaCl-solution, dried over magnesium sulfate and evaporated. The crude product was purified by flashmaster chromatography (dichloromethane:MeOH 95:5) to provide 5-Bromo-N2-(4-butylamino-phenyl)-N4-[2-(3H-imidazol-4-yl)-ethyl]-pyrimidine-2,4-diamine (130 mg). ESI-MS: 431.

1. stirringthe reaction mixture was stirred at room temperature overnight
2. extractionAfter extraction with ethylacetate/bicarbonate solution (3×) the combined organic layers
3. washwere washed with saturated NaCl-solution
4. dry with materialdried over magnesium sulfate
5. customevaporated
6. customThe crude product was purified by flashmaster chromatography (dichloromethane:MeOH 95:5)