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1,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochloride → 8-(1-Dimethylamino-6,7-dimethoxy-isoquinolin-4-ylmethyl)-3-isobutyl-1-methyl-3,7-dihydro-purine-2,6-dione

HRID 900723
Notes
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Reaction equation

HRID 900723 reaction equation
Cl.[CH3:2][N:3](C)[CH2:4]CCN=C=NCC.[NH2:13][C:14]1[C:15](=[O:27])[N:16]([CH3:26])[C:17](=[O:25])[N:18]([CH2:21][CH:22]([CH3:24])[CH3:23])[C:19]=1[NH2:20].Cl[C:29]1[C:38]2[C:33](=[CH:34][C:35]([O:41][CH3:42])=[C:36]([O:39][CH3:40])[CH:37]=2)[C:32]([CH2:43][C:44](O)=O)=[CH:31][N:30]=1>CO.O>[CH3:2][N:3]([CH3:4])[C:29]1[C:38]2[C:33](=[CH:34][C:35]([O:41][CH3:42])=[C:36]([O:39][CH3:40])[CH:37]=2)[C:32]([CH2:43][C:44]2[NH:13][C:14]3[C:15](=[O:27])[N:16]([CH3:26])[C:17](=[O:25])[N:18]([CH2:21][CH:22]([CH3:23])[CH3:24])[C:19]=3[N:20]=2)=[CH:31][N:30]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 3

HCID 27239391,3-Propanediamine, N'-(ethylcarbonimidoyl)-N,N-dimethyl-, monohydrochlorideHCID 41103394,5-Diamino-3-isobutyl-1-methylpyrimidine-2,6-dioneHCID 22226493(1-Chloro-6,7-dimethoxy-isoquinolin-4-yl)-acetic acid

Product 1

HCID 691977408-(1-Dimethylamino-6,7-dimethoxy-isoquinolin-4-ylmethyl)-3-isobutyl-1-methyl-3,7-dihydro-purine-2,6-dione

Reagents, catalysts & solvents 2

HCID 887
Methanol
Solvent
HCID 962WaterSolvent

Procedure

1-(3-Dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (0.29 g, 1.9 mmol) is added to 5,6-diamino-1-isobutyl-3-methyl-1H-pyrimidine-2,4-dione (0.40 g, 1.9 mmol)) and (1-chloro-6,7-dimethoxy-isoquinolin-4-yl)-acetic acid (0.39 g, 1.78 mmol) in methanol and water and the mixture is stirred at ambient temperature for 2 hours. The methanol is evaporated and the resultant solid collected by filtration and recrystalised from ethylacetate/methanol. The resulting solid is heated in a sealed tube (100° C., 8 h) with 40% aqueous dimethylamine. The mixture is evaporated and extracted with ethylacetate. The ethylacetate solution is then washed with water and brine, dried over sodium sulphate, filtered and concentrated. Further purification by flash silica column chromatography (eluant: ethylacetate/methanol) yields 8-(1-dimethylamino-6,7-dimethoxy-isoquinolin-4-ylmethyl)3-isobutyl-1-methyl-3,7dihydro-purine-2,6-dione, MH+ 467.

Workup

  1. customThe methanol is evaporated
  2. filtrationthe resultant solid collected by filtration
  3. customrecrystalised from ethylacetate/methanol
  4. temperatureThe resulting solid is heated in a sealed tube (100° C., 8 h) with 40% aqueous dimethylamine
  5. customThe mixture is evaporated
  6. extractionextracted with ethylacetate
  7. washThe ethylacetate solution is then washed with water and brine
  8. dry with materialdried over sodium sulphate
  9. filtrationfiltered
  10. concentrationconcentrated
  11. customFurther purification by flash silica column chromatography (eluant: ethylacetate/methanol)

Sources & evidence

ORD record
ord-e221b1be3ae044a4802811623c7d3570
Source dataset
uspto-grants-2008_04
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07361661B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes