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Dimethylformamide → 1-(3-Dimethylaminobutyl)-3-(3-diethylaminopropylamino)indazole

HRID 580179
Notes
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Reaction equation

HRID 580179 reaction equation
CN(C)C=O.[CH3:6][N:7]([CH3:22])[CH:8]([CH3:21])[CH2:9][CH2:10][N:11]1[C:19]2[C:14](=[CH:15][CH:16]=[CH:17][CH:18]=2)[C:13]([NH2:20])=[N:12]1.Br[CH2:24][CH2:25][CH2:26][N:27]([CH2:30][CH3:31])[CH2:28][CH3:29].C(=O)([O-])[O-].[K+].[K+]>C(Cl)(Cl)Cl.O>[CH3:22][N:7]([CH3:6])[CH:8]([CH3:21])[CH2:9][CH2:10][N:11]1[C:19]2[C:14](=[CH:15][CH:16]=[CH:17][CH:18]=2)[C:13]([NH:20][CH2:24][CH2:25][CH2:26][N:27]([CH2:30][CH3:31])[CH2:28][CH3:29])=[N:12]1
ParticipantsConditionsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 4

HCID 6228DimethylformamideHCID 11430Potassium CarbonateHCID 4152913-bromo-N,N-diethylpropan-1-amineHCID 132105851-(3-Dimethylaminobutyl)-3-aminoindazole

Product 1

HCID 30308381-(3-Dimethylaminobutyl)-3-(3-diethylaminopropylamino)indazoleYield 55.4%

Reagents, catalysts & solvents 2

HCID 962
Water
Solvent
HCID 6212ChloroformSolvent

Conditions

Temperature
80 °C

Procedure

To 60 ml of anhydrous N,N-dimethylformamide were added 7.50 g of the 1-(3-dimethylaminobutyl)-3-aminoindazole, 8.98 g of 3-bromopropyldiethylamine hydr bromide and 7.89 g of anhydrous potassium carbonate, and the mixture was stirred for 12 hours at 80° C. After cooling, the mixture was added with 80 ml of water and extracted with diethyl ether. The diethyl ether layer was extracted three times with 2N hydrochloric acid, and the hydrochlor.ic acid layer was washed with diethyl ether. The pH of the layer was adjusted to at least 11 with potassium carbonate, and the alkali layer was extracted three times with chloroform. The chloroform layer was dried over anhydrous sodium sulfate, and chloroform was removed under reduced pressure. The residue thus obtained was subjected to an alumina-column chromatography (alumina: 200 g) using chloroform as the developing solvent to give 6.18 g of 1-(3-dimethylaminobutyl)-3-(3-diethylaminopropylamino)indazole having the following analytical values in a yield of 52%.

Workup

  1. temperatureAfter cooling
  2. extractionextracted with diethyl ether
  3. extractionThe diethyl ether layer was extracted three times with 2N hydrochloric acid
  4. washthe hydrochlor.ic acid layer was washed with diethyl ether
  5. extractionthe alkali layer was extracted three times with chloroform
  6. dry with materialThe chloroform layer was dried over anhydrous sodium sulfate, and chloroform
  7. customwas removed under reduced pressure
  8. customThe residue thus obtained

Sources & evidence

ORD record
ord-bc1b8ad769ce42ce83efd05e9571d35e
Source dataset
uspto-grants-1988_06
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US04751302

Reaction notes

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On this pageParticipantsConditionsProcedureWorkupSources & evidenceReaction notes