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

HRID 592768Notes

Reaction equation

[F:1][C:2]1[C:10]2[CH2:9][CH2:8][CH2:7][CH2:6][C:5]=2[N:4]2[CH2:11][CH2:12][N:13]([C:16]3[N:23]=[CH:22][CH:21]=[C:20]([C:24]4[CH:29]=[C:28]([NH:30][C:31]5[CH:36]=[CH:35][CH:34]=[CH:33][N:32]=5)[C:27](=[O:37])[N:26]([CH3:38])[CH:25]=4)[C:17]=3[CH:18]=[O:19])[C:14](=[O:15])[C:3]=12.[BH4-].[Na+]>CO>[F:1][C:2]1[C:10]2[CH2:9][CH2:8][CH2:7][CH2:6][C:5]=2[N:4]2[CH2:11][CH2:12][N:13]([C:16]3[C:17]([CH2:18][OH:19])=[C:20]([C:24]4[CH:29]=[C:28]([NH:30][C:31]5[CH:36]=[CH:35][CH:34]=[CH:33][N:32]=5)[C:27](=[O:37])[N:26]([CH3:38])[CH:25]=4)[CH:21]=[CH:22][N:23]=3)[C:14](=[O:15])[C:3]=12

Participants

Conditions

Temperature: 20 °C

Procedure

A mixture of 183a (160 mg, 0.31 mmol) and NaBH4 (59 mg, 1.55 mmol) in methanol (20 mL) was stirred at 20° C. for 2 h. The reaction was then quenched with water and evaporated under reduced pressure. The residue was purified by reverse-phase prep-HPLC to afford 183 (42 mg, 26%) as an off-white solid. MS-ESI: [M+H]+ 515.3. 1H NMR (500 MHz, DMSO-d6) δ 8.74 (d, J=2.5 Hz, 1H), 8.65 (s, 1H), 8.50 (d, J=5.0 Hz, 1H), 8.18-8.17 (m, 1H), 7.61-7.58 (m, 1H), 7.53 (d, J=2.0 Hz, 1H), 7.36 (d, J=5.0 Hz, 1H), 7.31 (d, J=8.5 Hz, 1H), 6.81-6.79 (m, 1H), 4.95 (t, J=5.0 Hz, 1H), 4.49-4.40 (m, 2H), 4.22-4.14 (m, 2H), 4.10-4.05 (m, 1H), 3.87-3.85 (m, 1H), 3.62 (s, 3H), 2.64-2.60 (m, 1H), 2.57-2.53 (m, 1H), 2.43-2.41 (m, 2H), 1.81-1.75 (m, 2H), 1.71-1.67 (m, 2H).

Workup

customThe reaction was then quenched with water
customevaporated under reduced pressure
customThe residue was purified by reverse-phase prep-HPLC

Sources & evidence

ORD record: ord-d0f258d92c7444b5b6ab3ddd37a2596d
Source dataset: uspto-grants-2016_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US09238655B2

Reaction notes

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