Aluminium lithium hydride → 2,8-dimethyl-5-(2-(4-methylpiperazin-1-yl)ethyl)-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole

HRID 574546Notes

Reaction equation

HRID 574546 reaction equation
[H-].[H-].[H-].[H-].[Li+].[Al+3].[CH3:7][N:8]1[CH2:31][CH2:30][C:11]2[N:12]([CH2:20][C:21]([N:23]3[CH2:28][CH2:27][N:26]([CH3:29])[CH2:25][CH2:24]3)=O)[C:13]3[CH:14]=[CH:15][C:16]([CH3:19])=[CH:17][C:18]=3[C:10]=2[CH2:9]1>C1COCC1>[CH3:7][N:8]1[CH2:31][CH2:30][C:11]2[N:12]([CH2:20][CH2:21][N:23]3[CH2:24][CH2:25][N:26]([CH3:29])[CH2:27][CH2:28]3)[C:13]3[CH:14]=[CH:15][C:16]([CH3:19])=[CH:17][C:18]=3[C:10]=2[CH2:9]1

Participants

4

Reactant 2

HCID 21226445Aluminium lithium hydrideHCID 578763372-(2,8-dimethyl-3,4-dihydro-1H-pyrido[4,3-b]indol-5(2H)-yl)-1-(4-methylpiperazin-1-yl)ethanone

Product 1

HCID 578762952,8-dimethyl-5-(2-(4-methylpiperazin-1-yl)ethyl)-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indoleYield 22.9%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

LAH (0.022 g, 0.58 mmol) was charged in dry THF (3 mL) and cooled to 0 deg C., 2-(2,8-dimethyl-3,4-dihydro-1H-pyrido[4,3-b]indol-5(2H)-yl)-1-(4-methylpiperazin-1-yl)ethanone (0.05 g, 0.147 mmol) was added to it portion wise. The reaction mixture was refluxed for 4 h. The reaction mixture was cooled to 0 deg C. and quenched with sat. Na2SO4. The solid formed was filtered through celite, washed with THF, dried over Na2SO4 and concentrated under reduced pressure to obtain 11 mg of 2,8-dimethyl-5-(2-(4-methylpiperazin-1-yl)ethyl)-2,3,4,5-tetrahydro-1H-pyrido[4,3-b]indole as TFA salt after purification by reverse-phase chromatography (C-18, 500 mm×50 mm, Mobile Phase A=0.05% TFA in water, B=0.05% TFA in acetonitrile, Gradient: 10% B to 80% B in 30 min, injection vol. 5 mL).

Workup

  1. temperaturecooled to 0 deg C
  2. temperatureThe reaction mixture was refluxed for 4 h
  3. temperatureThe reaction mixture was cooled to 0 deg C
  4. customand quenched with sat. Na2SO4
  5. customThe solid formed
  6. filtrationwas filtered through celite
  7. washwashed with THF
  8. dry with materialdried over Na2SO4
  9. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-3903d86a08114265a6d3910b8f929c7c
Source dataset
uspto-grants-2015_05
Patent number
US09034880B2

Reaction notes

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