反应详情

A mixture of 400 (451 mg, 1.14 mmol) and 1-methylpiperazine (152 μL, 137 mg, 1.37 mmol) in DCM (7 mL) was stirred at room temperature for 10 min. It was then treated with NaBH(OAc)3 (340 mg, 1.60 mmol) and stirred at room temperature overnight. The reaction mixture was diluted with DCM (20 mL) and washed with saturated NaHCO3 solution (20 mL). The organic phase was collected, dried over anhydrous Na2SO4, filtered and concentrated. The residue was purified by flash chromatography using the gradient 30-50% MeOH (with 2% Et3N) in EtOAc to afford 401 (308 mg, 52% yield). MS (m/z): (M+1) 480.0 (100%).

1. stirringstirred at room temperature overnight
2. washwashed with saturated NaHCO3 solution (20 mL)
3. customThe organic phase was collected
4. dry with materialdried over anhydrous Na2SO4
5. filtrationfiltered
6. concentrationconcentrated
7. customThe residue was purified by flash chromatography