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

Participants

Reaction Conditions

Reaction Steps

A mixture of 118c (350 mg, 0.62 mmol) and LiOH.H2O (260 mg, 6.2 mmol) in iPrOH/THF (1:1, 3 mL) and H2O (1 mL) was stirred at 30° C. for 1 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 by reverse-phase prep-HPLC to afford 118 (200 mg, 54%) as a white solid. LCMS: [M+H]+ 526. 1H NMR (500 MHz, DMSO) δ 11.83 (s, 1H), 8.48 (d, J=5, 1H), 8.05 (d, J=2, 1H), 8.03 (s, 1H), 7.38 (d, J=2, 1H), 7.31 (d, J=5, 1H), 6.58 (s, 1H), 5.81 (d, J=2, 1H), 4.95 (t, J=5, 1H), 4.49-4.51 (m, 1H), 4.38-4.40 (m, 1H), 4.19-4.21 (m, 3H), 3.85-3.87 (m, 1H), 3.58 (s, 3H), 2.61-2.62 (m, 1H), 2.56-2.57 (m, 1H), 2.48-2.49 (m, 2H), 1.81-1.82 (m, 3H), 1.70-1.71 (m, 2H), 0.88-0.89 (m, 2H), 0.63-0.64 (m, 2H)

Provenance & Evidence