反应详情

A suspension of 8-(4-cyclopropyl-2-fluoro-phenylamino)-imidazo[1,5-a]pyridine-7-carboxylic acid (0.11 g, 0.35 mmol), EDCI (0.081 g, 0.42 mmol), HOBt (0.057 g, 0.42 mmol), DIPEA (0.085 mL, 0.88 mmol) and (S)-1-aminooxy-propan-2-ol hydrochloride (0.05 g, 0.39 mmol) in DMF (1.5 mL) was stirred at room temperature for 18 hours. The reaction mixture was partitioned between DCM (5 mL) and saturated aqueous NaHCO3 (5 mL). The organic layer was washed with water (5 mL), followed by brine (5 mL), then dried (MgSO4), filtered and concentrated in vacuo. The resultant residue was subjected to flash chromatography (Si-PPC, gradient 0% to 60%, ethyl actetate in DCM) to give a yellow sticky solid, which was further purified by preparative HPLC (Gemini 5 micron C18 250×21.20 mm column, 0.1% formic acid, gradient acetonitrile/water, 5 to 98%, ramp time 20 minutes) to afford the title compound as a yellow solid (38 mg, 27%). LCMS (method A): RT=6.87 min, [M+H]+=385. 1H NMR (DMSO-d6) 10.54 (1H, s), 8.27 (1 H, s), 7.76 (1H, dd, J=7.37, 0.93 Hz), 7.14 (1H, t, J=8.37 Hz), 6.98 (1H, dd, J=11.87, 1.95 Hz), 6.95-6.89 (1H, m), 6.76 (1H, d, J=7.33 Hz), 6.27 (1H, s), 3.89-3.79 (1H, m), 3.72-3.62 (2H, m), 1.99-1.90 (1H, m), 1.04 (3H, d, J=6.34 Hz), 0.99-0.93 (2H, m), 0.76-0.67 (2H, m).

1. customThe reaction mixture was partitioned between DCM (5 mL) and saturated aqueous NaHCO3 (5 mL)
2. washThe organic layer was washed with water (5 mL)
3. dry with materialdried (MgSO4)
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customto give a yellow sticky solid, which
7. customwas further purified by preparative HPLC (Gemini 5 micron C18 250×21.20 mm column, 0.1% formic acid, gradient acetonitrile/water, 5 to 98%, ramp time 20 minutes)