Water → 6-Tert-butyl-8-fluoro-2-[3-(hydroxymethyl)-4-[1-methyl-5-[(5-methylisoxazol-3-yl)amino]-6-oxo-3-pyridyl]-2-pyridyl]phthalazin-1-one

Participants

Reaction Steps

To a solution of 129b (280 mg, 0.49 mmol) in THF (4 mL), i-propanol (4 mL), and water (2 mL) was added lithium hydroxide (24 mg, 0.98 mmol). The reaction mixture was stirred at room temperature for 1 h. It was concentrated under reduced pressure and the residue was purified by reverse-phase prep-HPLC to afford 129 as a white solid (85 mg, 33%). MS-ESI: [M+H]+ 531.3. 1H NMR (500 MHz, DMSO-d6) δ 9.03 (s, 1H), 8.58 (d, J=5.0 Hz, 1H), 8.54 (d, J=3.0 Hz, 1H), 7.99 (d, J=2.0 Hz, 1H), 7.91 (d, J=1.0 Hz, 1H), 7.78 (dd, J=1.0, 13.0 Hz, 1H), 7.56 (d, J=2.0 Hz, 1H), 7.51 (d, J=5.0 Hz, 1H), 6.26 (s, 1H), 4.92 (s, 1H), 4.43 (d, J=6.0 Hz, 2H), 3.61 (s, 3H), 2.32 (s, 3H), 1.40 (s, 9H).

Provenance & Evidence