Sodium borohydride → 10-Fluoro-2-(3-(hydroxymethyl)-4-(1-methyl-6-oxo-5-(pyrimidin-4-ylamino)-1,6-dihydropyridin-3-yl)pyridin-2-yl)-3,4,6,7,8,9-hexahydropyrazino[1,2-a]indol-1(2H)-one

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Reaction Conditions

Reaction Steps

A mixture of 146b (79 mg, 0.15 mmol), NaBH4 (22 mg, 0.60), and CH3OH (10 mL) was stirred at 25° C. for 1 h. The mixture was extracted with CH2Cl2 (10 mL×2). The combined CH2Cl2 extract was concentrated under reduced pressure. The residue was purified with reverse-phase prep-HPLC to afford 146 (39 mg, 49%). LCMS: [M+H]+ 516. 1H NMR (500 MHz, CDCl3) δ 8.83 (d, J=2.0, 1H), 8.78 (s, 1H), 8.52 (d, J=5.0, 1H), 8.35 (d, J=5.5, 1H), 8.12 (s, 1H), 8.03 (d, J=2.0, 1H), 7.36 (d, J=5.0, 1H), 6.76-6.77 (m, 1H), 5.07 (s, 1H), 4.65 (d, J=9.5, 1H), 4.48 (d, J=9.5, 1H), 4.29 (d, J=1.5, 1H), 4.02-4.13 (m, 2H), 3.79 (d, J=6.5, 1H), 3.73 (s, 3H), 2.52-2.58 (m, 4H), 1.85-1.90 (m, 2H), 1.77 (d, J=5.0, 2 H)

Provenance & Evidence