Lithium hydroxide, monohydrate → (R)-2-(3-(5-(5-(3,4-dimethylpiperazin-1-yl)pyridin-2-ylamino)-1-methyl-6-oxo-1,6-dihydropyridin-3-yl)-5-fluoro-2-(hydroxymethyl)-phenyl)-3,4,6,7,8,9-hexahydropyrazino[1,2-a]indol-1(2H)-one

Participants

Reaction Conditions

Reaction Steps

A mixture of 108f (250 mg, 0.375 mmol) and LiOH.H2O (98 mg, 2.0 mmol) in iPrOH/THF (1:1, 3 mL) and H2O (1 mL) was stirred at 30° C. for 2 h. The mixture was evaporated in vacuo and the residue was extracted with EtOAc (10 mL×2). The combined EtOAc extract was concentrated under reduced pressure and the residue was purified with reverse-phase prep-HPLC to afford 108 (62 mg, 26%) as a white solid. LCMS: [M+H]+ 626. 1H NMR (500 MHz, CDCl3) δ 8.53 (s, 1H), 7.89 (d, J=2.5, 1H), 7.76 (s, 1H), 7.45 (d, J=2, 1H), 7.26 (s, 1H), 7.14-7.16 (m, 1H), 6.92-6.94 (m, 1H), 6.86 (s, 1H), 6.79 (d, J=9, 1H), 4.52-4.54 (m, 1H), 4.30-4.32 (m, 2H), 4.14-1.16 (m, 3H), 3.90-3.91 (m, 1H), 3.69 (s, 3H), 3.34-3.35 (m, 2H), 2.91-2.92 (m, 2H), 2.60-2.38 (m, 10H), 1.83-1.85 (m, 2H), 1.78-1.79 (m, 2H), 1.17 (s, 3H)

Provenance & Evidence