反应详情

1-Methyl piperazine (5.75 mL, 0.0514 mol) in 1,2-dichloroethane (1096.7 mL, 13.892 mol) was added to 3-(8-chloro-1-iodo-imidazo[1,5-a]pyrazin-3-yl)-cyclobutanone (17.00 g, 0.04892 mol) and sodium triacetoxyborohydride (21.8 g, 0.0978 mol). The reaction stirred at rt for 3 h. The reaction was concentrated, dissolved in CH2Cl2, and then washed with saturated NaHCO3 solution and brine. The product was dried over sodium sulfate, filtered, and concentrated in vacuo. The product was flushed through a quick silica gel plug (wetted with 100% CHCl3, eluted with 8% (7N NH3) MeOH in CHCl3), to afford the title compound; 1H NMR (CDCl3, 400 MHz) δ 7.63 (1H, d), 7.30 (1H, d), 3.42 (1H, m), 2.94 (1H, m), 2.65 (4H, m), 2.44 (8H, m), 2.32 (3H, s); MS (ES+): m/z 431.85/433.87 (100/45) [MH+]; HPLC: tR=1.82 min. (OpenLynx, polar—5 min.).

1. concentrationThe reaction was concentrated
2. dissolutiondissolved in CH2Cl2
3. washwashed with saturated NaHCO3 solution and brine
4. dry with materialThe product was dried over sodium sulfate
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customThe product was flushed through a quick silica gel plug (wetted with 100% CHCl3, eluted with 8% (7N NH3) MeOH in CHCl3)