HCID 89815813, compound → (R)-2-(2-(1-isopropyl-7-(methylsulfonyl)-3,4-dihydropyrazino[1,2-a]indol-2(1H)-yl)-4-(trifluoromethyl)pyrimidin-5-yl)propan-2-ol

Participants

Reaction Conditions

Reaction Steps

To a solution of (R)-1-(2-(1-isopropyl-7-(methylsulfonyl)-3,4-dihydropyrazino[1,2-a]indol-2(1H)-yl)-4-(trifluoromethyl)pyrimidin-5-yl)ethanone (5 mg, 0.01 mmol) in THF (1 mL) was added LaCl3-2LiCl (0.2 mL, 0.12 mmol, 0.6M) at 0° C. under nitrogen. The reaction mixture was stirred at 0° C. for 1 h. MeMgCl (0.3 mL, 0.9 mmol, 3M) was added to the formed mixture and then the reaction mixture was stirred at 0° C. for 1 h. The reaction was quenched with sat. NH4Cl (5 mL) at 0° C. and then extracted with EtOAc (30 mL×3). The combined organic layers were dried over anhydrous Na2SO4, filtered and concentrated, purified by preparative TLC eluting with PE/EtOAc 1:1 and then by SFC separation to afford (R)-2-(2-(1-isopropyl-7-(methylsulfonyl)-3,4-dihydropyrazino[1,2-a]indol-2(1H)-yl)-4-(trifluoromethyl)pyrimidin-5-yl)propan-2-ol (1.20 mg, 24.68% yield, Isomer 1) as a colorless oil. Analytical chiral HPLC: tR=6.394 min in 15 min chromatography (Method: OJ-H_3_5_40_2.35 ML). LC-MS m/z 497.3 [M+H]+. 1H NMR (CDCl3 400 MHz): δ 8.75 (s, 1H), 7.93 (s, 1H), 7.70 (d, J=8.4 Hz, 1H), 7.62 (d, J1=8.4 Hz, J2=1.6 Hz, 1H), 6.48 (s, 1H), 5.89 (d, J=8.8 Hz, 1H), 5.16-5.12 (m, 1H), 4.32-4.28 (m, 1H), 4.14-4.07 (m, 1H), 3.86-3.77 (m, 1H), 3.07 (s, 3H), 2.34-2.25 (m, 1H), 1.92 (s, 1H), 1.68 (s, 6H), 1.18 (d, J=7.2 Hz, 3H), 1.06 (d, J=7.2 Hz, 3H)

Provenance & Evidence