反应详情

To a magnetically stirred mixture of 5-fluoro-2-(4-fluorobenzyloxy)pyrimidin-4-ylamine (0.25 g, 1.05 mmol) in dry THF (5 mL) at 0° C. was added NaH (0.042 g of 60 wt. % suspension in mineral oil, 1.05 mmol). When bubbling ceased, triethylsilyl chloride (0.158 g, 1.05 mmol) was added dropwise (neat) via syringe. After stirring overnight at ambient temperature, the reaction mixture was poured into ether and washed with a mixture of aqueous saturated sodium bicarbonate and brine solution. The organic layer was separated, dried over Na2SO4, filtered, and evaporated to give a white solid. This crude material was purified on silica by column chromatography (EtOAc/hexanes gradient) to give 0.121 g (33%) of [5-fluoro-2-(4-fluorobenzyloxy)pyrimidin-4-yl]-triethylsilanylamine as a clear yellow oil: 1H NMR (300 MHz, CDCl3) δ 7.89 (d, J=2.5 Hz, 1H), 7.39 (m, 2H), 7.03 (t, J=8.6 Hz, 2H), 5.27 (s, 2H), 4.53 (s, 1H), 0.99 (m, 9H), 0.83 (m, 6H); HPLC-MS (ESI) m/z 352 (M+H)+.

1. customWhen bubbling
2. washwashed with a mixture of aqueous saturated sodium bicarbonate and brine solution
3. customThe organic layer was separated
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. customevaporated
7. customto give a white solid
8. customThis crude material was purified on silica by column chromatography (EtOAc/hexanes gradient)