Lithium Hydroxide → 2-[4-[5-[(5,6-dimethyl-6,7-dihydro-4H-pyrazolo[1,5-a]pyrazin-2-yl)amino]-1-methyl-6-oxo-3-pyridyl]-3-(hydroxymethyl)-2-pyridyl]-3,4,6,7,8,9-hexahydropyrazino[1,2-a]indol-1-one

Participants

Reaction Conditions

Reaction Steps

To a solution of 250f (75 mg, 0.123 mmol) in THF/i-propanol/water (4/2/2 mL) was added lithium hydroxide (15 mg, 0.62 mmol). The mixture was stirred at 30° C. for 1 h. After the reaction was complete, the mixture was evaporated under reduced pressure and the residue was purified by reverse-phase prep-HPLC to afford 250 as a white solid (40 mg, 57%). MS-ESI: [M+H]+ 569.3. 1H NMR (500 MHz, CDCl3) δ 8.49 (d, J=5.0 Hz, 1H), 7.96 (bs, 1H), 7.73 (d, J=2.0 Hz, 1H), 7.43 (s, 1H), 7.36 (d, J=5.0 Hz, 1H), 6.91 (s, 1H), 5.71 (s, 1H), 5.03 (t, J=3.5 Hz, 1H), 4.65-4.62 (m, 1H), 4.52-4.50 (m, 1H), 4.35-4.33 (m, 1H), 4.17-4.05 (m, 3H), 3.91-3.88 (m, 2H), 3.73-3.71 (m, 1H), 3.71 (s, 3H), 3.55-3.52 (m, 1H), 2.90-2.87 (m, 1H), 2.64-2.58 (m, 4H), 2.43 (s, 3H), 1.93-1.90 (m, 2H), 1.81-1.80 (m, 2H), 1.24 (d, J=6.5 Hz, 3H).

Provenance & Evidence