反应详情

To a magnetically stirred solution of 4-chloro-5-fluoro-2-(3-methoxybenzyloxy)pyrimidine* (1.3 g, 4.84 mmol) in dry DMF (5 mL) was added a pre-mixed suspension of 60% NaH (0.45 g, 10.65 mmol) and sulfamide (0.93 g, 9.68 mmol) in dry DMF (5 mL). The resulting off-white suspension was stirred at room temperature for 72 hrs. The orange suspension was then heated to 50° C. for 48 hours and cooled to room temperature. The reaction mixture was partitioned between ethyl acetate and brine solution. The organic extract was dried over Na2SO4, filtered, and evaporated. The crude material was purified by column chromatography on normal phase silica using a gradient of EtOAc/Hex and reverse phase using a gradient of H2O/ACN to yield [5-Fluoro-2-(3-methoxybenzyloxy)pyrimidin-4-yl]sulfamide (115 mg, 7.2% yield) as a white solid: mp 126-130° C.; 1H NMR (300 MHz, CD3OD) δ 8.01 (d, J=3.63 Hz, 1H), 7.25 (m, 1H), 7.01 (m, 2H), 6.88 (m, 1H), 5.37 (s, 2H), 3.78 (s, 3H); MS (ESI) m/z 326.9 (M−H)−. * The 4-chloro-5-fluoro-2-(3-methoxybenzyloxy)pyrimidine intermediate was prepared as described in the synthesis of 31.

1. temperatureThe orange suspension was then heated to 50° C. for 48 hours
2. temperaturecooled to room temperature
3. customThe reaction mixture was partitioned between ethyl acetate and brine solution
4. extractionThe organic extract
5. dry with materialwas dried over Na2SO4
6. filtrationfiltered
7. customevaporated
8. customThe crude material was purified by column chromatography on normal phase silica using a gradient of EtOAc/Hex