Lithium Hydroxide → 2-[3'-Hydroxymethyl-1-methyl-6-oxo-5-(pyrazin-2-ylamino)-1,6-dihydro-[3,4']bipyridinyl-2'-yl]-3,4,6,7,8,9-hexahydro-2H-pyrazino[1,2-a]indol-1-one

HRID 1021783Notes

Reaction equation

HRID 1021783 reaction equation
C([O:4][CH2:5][C:6]1[C:7]([N:27]2[CH2:39][CH2:38][N:30]3[C:31]4[CH2:32][CH2:33][CH2:34][CH2:35][C:36]=4[CH:37]=[C:29]3[C:28]2=[O:40])=[N:8][CH:9]=[CH:10][C:11]=1[C:12]1[CH:17]=[C:16]([NH:18][C:19]2[CH:24]=[N:23][CH:22]=[CH:21][N:20]=2)[C:15](=[O:25])[N:14]([CH3:26])[CH:13]=1)(=O)C.[OH-].[Li+]>C(O)(C)C.C1COCC1.O>[OH:4][CH2:5][C:6]1[C:7]([N:27]2[CH2:39][CH2:38][N:30]3[C:31]4[CH2:32][CH2:33][CH2:34][CH2:35][C:36]=4[CH:37]=[C:29]3[C:28]2=[O:40])=[N:8][CH:9]=[CH:10][C:11]=1[C:12]1[CH:17]=[C:16]([NH:18][C:19]2[CH:24]=[N:23][CH:22]=[CH:21][N:20]=2)[C:15](=[O:25])[N:14]([CH3:26])[CH:13]=1

Participants

5

Reactant 2

HCID 3939Lithium HydroxideHCID 86684286(4-(1-Methyl-6-oxo-5-(pyrazin-2-ylamino)-1,6-dihydropyridin-3-yl)-2-(1-oxo-3,4,6,7,8,9-hexahydropyrazino[1,2-a]indol-2(1H)-yl)pyridin-3-yl)methyl acetate

Product 1

HCID 715572722-[3'-Hydroxymethyl-1-methyl-6-oxo-5-(pyrazin-2-ylamino)-1,6-dihydro-[3,4']bipyridinyl-2'-yl]-3,4,6,7,8,9-hexahydro-2H-pyrazino[1,2-a]indol-1-oneYield 85.4%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 22597222Tetrahydrofuran 2-propanolSolvent

Conditions

Temperature
30 °C

Procedure

A mixture of 162b (110 mg, 0.20 mmol) and lithium hydroxide (84 mg, 2.0 mmol) in i-propanol/THF (1:1, 4 mL) and water (1 mL) was stirred at 30° C. for 1 h. The mixture was evaporated in vacuo and the residue was diluted with water and ethyl acetate. The water phase was separated and extracted with ethyl acetate (2×10 mL). The combined ethyl acetate extract was concentrated under reduced pressure and the residue was purified by reverse-phase prep-HPLC to afford 162 (85 mg, 85%) as pale yellow solid. MS-ESI: [M+H]+ 498.3. 1H NMR (500 MHz, CHCl3) δ 8.73 (d, J=2.5 Hz, 1H), 8.54 (d, J=5 Hz, 1H), 8.29 (s, 1H), 8.15-8.14 (m, 2H), 8.01 (d, J=2.5 Hz, 1H), 8.00 (d, J=2.0 Hz, 1H), 7.37 (d, J=5 Hz, 1H), 6.91 (s, 1H), 4.66-4.65 (m, 1H), 4.52-4.51 (m, 1H), 4.32-4.31 (m, 1H), 4.18-4.17 (m, 1H), 4.14-4.12 (m, 1H), 3.90-3.88 (m, 1H), 3.75 (s, 3H), 2.62-2.57 (m, 4H), 1.92-1.88 (m, 3H), 1.80-1.79 (m, 2H).

Workup

  1. customThe mixture was evaporated in vacuo
  2. additionthe residue was diluted with water and ethyl acetate
  3. customThe water phase was separated
  4. extractionextracted with ethyl acetate (2×10 mL)
  5. extractionThe combined ethyl acetate extract
  6. concentrationwas concentrated under reduced pressure
  7. customthe residue was purified by reverse-phase prep-HPLC

Sources & evidence

ORD record
ord-0a3d23cb3d69494db03a10c330897dfa
Source dataset
uspto-grants-2014_05
Patent number
US08716274B2

Reaction notes

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