反应详情

trans-[4-(8-Chloroimidazo[1,5-a]pyrazin-3-yl)cyclohexyl]methanol (18.00 g, 67.74 mmol) and N-iodosuccinimide (19.81 g, 88.06 mmol) in anhydrous DMF (360 mL) were stirred at 60° C. under N2 for 6 h. The reaction was diluted with DCM (˜600 mL), washed with water and brine, dried over anhydrous Na2SO4 and then concentrated in vacuo. The crude material was purified by a silica gel flash chromatography (eluted with 1:2 EtOAc/DCM to 1:1 EtOAc/DCM) to obtain the desired product as a pale yellow solid; By 1H NMR analysis, the product was contaminated with 0.35 equiv of NIS-impurity. The product was carried onto the next reaction without further purification; MS (ES+): m/z 391.92 (100) [MH+], 393.88 (50) [MH+2], 394.89 (10) [MH+3]; tR(polar-5 min/openlynx) 2.79 min.

1. washwashed with water and brine
2. dry with materialdried over anhydrous Na2SO4
3. concentrationconcentrated in vacuo
4. customThe crude material was purified by a silica gel flash chromatography (eluted with 1:2 EtOAc/DCM to 1:1 EtOAc/DCM)