反应详情

Under nitrogen, to a solution of the product of Step 1 (490 mg, 2.52 mmol) in DMF (10 mL), was added 1-methylpiperazine (505 mg, 5.04 mmol), HOBT (1.02 g, 7.6 mmol), HBTU (950 mg, 2.5 mmol), followed with 4-methylmorpholine (770 μL, 7.6 mmol). This mixture was then stirred at rt overnight. The reaction mixture was concentrated and the residue was purified with reverse phase HPLC (5% MeCN/H2O→50% MeCN/H2O), to afford the title compound as white solid (572 mg, 82%). MS (ES+) m/e 277 [M+H]+.

1. concentrationThe reaction mixture was concentrated
2. customthe residue was purified with reverse phase HPLC (5% MeCN/H2O→50% MeCN/H2O)