反应详情

温度

60 °C

To a 250 mL round-bottomed flask were added 4-(trifluoromethyl)thiazol-2-amine (6 g, 36 mmol), ACN (90 mL, 1723 mmol), and N-bromosuccinimide (4 mL, 43 mmol). The solution was stirred at 60° C. for 3 hours. The reaction was cooled, and the solvent was removed in vacuo. The crude product was adsorbed onto a plug of silica gel and chromatographed through a Redi-Sep® pre-packed silica gel column (40 g), eluting with a gradient of (5%→50% EtOAc in hexane) to provide 5-bromo-4-(trifluoromethyl)thiazol-2-amine (8.1 g, 90% yield), m/z (%): 248.2 (100%, M++H).

1. temperatureThe reaction was cooled
2. customthe solvent was removed in vacuo
3. customchromatographed through a Redi-Sep® pre-packed silica gel column (40 g)
4. washeluting with a gradient of (5%→50% EtOAc in hexane)