反应详情

温度

50 °C

5′-(7-Acetylimidazo[1,2-α]pyrimidin-3-yl)-2′-fluorobiphenyl-2-carbonitrile (80 mg, 0.22 mmol) and pyridinium tribromide (110 mg, 0.34 mmol) in chloroform (5 ml) was stirred at 50° C. for 3 h. Thioacetamide (33 mg, 0.44 mmol) was then added and the reaction stirred at 50° C. for 16 h. The resulting mixture was partitioned between dichloromethane and saturated aqueous sodium hydrogencarbonate solution. The organic extracts were washed with brine, dried over anhydrous magnesium sulfate, filtered and evaporated to dryness. The residue was purified by preparative thin-layer chromatography eluting with dichloromethane containing 5% methanol and 1% conc. ammonia to give a foam. Trituration with diethyl ether afforded 2′-fluoro-5′-[7-(2-methylthiazol-5-yl)imidazo[1,2-α]pyrimidin-3-yl]biphenyl-2-carbonitrile as a yellow solid (10 mg, 11%): δH (400 MHz, DMSO) 2.75 (3H, s), 7.56-7.68 (5H, m), 7.81-7.92 (3H, m), 7.98-8.05 (2H, m), 8.40 (1H, s), 9.12 (1H, s); m/z (ES+) 412 (M++H).

1. customThe resulting mixture was partitioned between dichloromethane and saturated aqueous sodium hydrogencarbonate solution
2. washThe organic extracts were washed with brine
3. dry with materialdried over anhydrous magnesium sulfate
4. filtrationfiltered
5. customevaporated to dryness
6. customThe residue was purified by preparative thin-layer chromatography
7. washeluting with dichloromethane containing 5% methanol and 1% conc. ammonia
8. customto give a foam