Dibenamine hydrochloride → 9-(2-Dibenzylamino-ethoxy)-1-oxo-6,7-dihydro-1H,5H-pyrido[3,2,1-ij]quinoline-2-carboxylic acid 2-dibenzylamino-ethyl ester

HRID 2099122Notes

Reaction equation

HRID 2099122 reaction equation
[OH:1][C:2]1[CH:3]=[C:4]2[C:9]3=[C:10]([CH2:12][CH2:13][CH2:14][N:8]3[CH:7]=[C:6]([C:15]([OH:17])=[O:16])[C:5]2=[O:18])[CH:11]=1.C(=O)([O-])[O-].[K+].[K+].Cl.[CH2:26]([N:33]([CH2:37][C:38]1[CH:43]=[CH:42][CH:41]=[CH:40][CH:39]=1)[CH2:34][CH2:35]Cl)[C:27]1[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1>CN(C=O)C>[CH2:26]([N:33]([CH2:37][C:38]1[CH:43]=[CH:42][CH:41]=[CH:40][CH:39]=1)[CH2:34][CH2:35][O:16][C:15]([C:6]1[C:5](=[O:18])[C:4]2[C:9]3=[C:10]([CH2:12][CH2:13][CH2:14][N:8]3[CH:7]=1)[CH:11]=[C:2]([O:1][CH2:35][CH2:34][N:33]([CH2:26][C:27]1[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1)[CH2:37][C:38]1[CH:43]=[CH:42][CH:41]=[CH:40][CH:39]=1)[CH:3]=2)=[O:17])[C:27]1[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1

Participants

5

Reactant 3

HCID 5925Dibenamine hydrochloride2×HCID 11430Potassium Carbonate2×HCID 214453649-Hydroxy-1-oxo-6,7-dihydro-1H,5H-pyrido[3,2,1-ij]quinoline-2-carboxylic acid

Product 1

HCID 688610139-(2-Dibenzylamino-ethoxy)-1-oxo-6,7-dihydro-1H,5H-pyrido[3,2,1-ij]quinoline-2-carboxylic acid 2-dibenzylamino-ethyl esterYield 89%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
60 °C

Procedure

9-Hydroxy-1-oxo-6,7-dihydro-1H,5H-pyrido[3,2,1-ij]quinoline-2-carboxylic acid (GB1417129) (0.905 g, 3.69 mmol) was suspended in dry DMF (50 mL). To this was added potassium carbonate (3.06 g, 22 mmol) and dibenzyl-(2-chloroethyl)amine hydrochloride (2.37 g, 8 mmol). The mixture was heated at 60° C. for 16 h, then more potassium carbonate (0.55 g) and dibenzyl-(2-chloroethyl)amine hydrochloride (1.18 g, 4 mmol) were added. After a further 25 h at 75° C. the mixture was evaporated. The residue was diluted with water and extracted with ethyl acetate (×3). The combined organic extracts were washed with brine, dried and evaporated under reduced pressure. The crude product (4.0 g) was purified by chromatography on silica gel (100 g), eluting with 0-4% methanol in dichloromethane, to give the title compound (2.25 g, 89%); ESMS m/z 692 [M+H]+ (100%).

Workup

  1. customAfter a further 25 h at 75° C. the mixture was evaporated
  2. additionThe residue was diluted with water
  3. extractionextracted with ethyl acetate (×3)
  4. washThe combined organic extracts were washed with brine
  5. customdried
  6. customevaporated under reduced pressure
  7. customThe crude product (4.0 g) was purified by chromatography on silica gel (100 g)
  8. washeluting with 0-4% methanol in dichloromethane

Sources & evidence

ORD record
ord-5b3f986604304e2ea9dde706c43d7720
Source dataset
uspto-grants-2009_08
Patent number
US07569550B2

Reaction notes

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