Hydrochloric Acid → 6-[3-(Dimethylamino)propyl]-9-hydroxy-4-phenylpyrrolo[3,4-c]carbazole-1,3(2H,6H)-dione

HRID 11088Notes

Reaction equation

HRID 11088 reaction equation
Br[CH2:2][CH2:3][CH2:4][N:5]1[C:17]2[CH:16]=[C:15]([C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=3)[C:14]3[C:24](=[O:28])[NH:25][C:26](=[O:27])[C:13]=3[C:12]=2[C:11]2[CH:10]=[C:9]([OH:29])[CH:8]=[CH:7][C:6]1=2.[CH3:30][NH:31][CH3:32].Cl.C(=O)([O-])[O-].[K+].[K+]>CC(N(C)C)=O.O>[CH3:30][N:31]([CH3:32])[CH2:2][CH2:3][CH2:4][N:5]1[C:17]2[CH:16]=[C:15]([C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=3)[C:14]3[C:24](=[O:28])[NH:25][C:26](=[O:27])[C:13]=3[C:12]=2[C:11]2[CH:10]=[C:9]([OH:29])[CH:8]=[CH:7][C:6]1=2

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 674DimethylamineHCID 11430Potassium CarbonateHCID 867602016-(3-Bromopropyl)-9-hydroxy-4-phenylpyrrolo[3,4-c]carbazole-1,3(2H,6H)-dione

Product 1

HCID 248853166-[3-(Dimethylamino)propyl]-9-hydroxy-4-phenylpyrrolo[3,4-c]carbazole-1,3(2H,6H)-dioneYield 47%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 31374DimethylacetamideSolvent

Conditions

Temperature
80 °C

Procedure

To a solution of bromide (204) prepared as described in example 173 (0.12 g, 0.27 mmol) in dimethylacetamide (4 mL) was added the amine, dimethylamine (25 mol eq., 0.85 mL in this case as an 40% aqueous solution). The reaction vessel was sealed and heated at 80° C. with stirring for 18 h, before being diluted with water. The resulting solution was then acidified by the dropwise addition of concentrated hydrochloric acid and the pH was then adjusted to approximately pH=9 by the addition of solid potassium carbonate. The precipitated product was either collected by filtration and washed with water and diisopropyl ether before being dried or extracted with ethyl acetate. The organic layer was dried, the drying agent was removed and the solution was concentrated to dryness. Chromatography on silica eluting with methanol/dichloromethane (1:9 to 1:4), followed by trituration in ethyl acetate/hexane gave amine (208) (52 mg, 47%) as a yellow powder, mp 185–189° C. 1H NMR δ [(CD3)2SO] 11.05 (s, 1H), 9.34 (s, 1H), 8.41 (d, J=2.4 Hz, 1H), 7.78 (s, 1H), 7.64 (m, 2H), 7.56 (d, J=8.9 Hz, 1H), 7.47 (m, 3H), 7.14 (dd, J=8.9, 2.4 Hz, 1H), 4.48 (t, J=6.6 Hz, 2H), 2.16 (t, J=6.5 Hz, 2H), 2.08 (s, 6H), 1.90 (m, 2H). Found: C, 71.98; H, 5.67; N, 10.14. C25H23N3O3.1/4H2O requires: C, 71.84; H, 5.67; N, 10.05.

Workup

  1. customThe reaction vessel was sealed
  2. filtrationThe precipitated product was either collected by filtration
  3. washwashed with water and diisopropyl ether
  4. custombefore being dried
  5. extractionextracted with ethyl acetate
  6. customThe organic layer was dried
  7. customthe drying agent was removed
  8. concentrationthe solution was concentrated to dryness

Sources & evidence

ORD record
ord-0f71807f4508467783c850c345328123
Source dataset
uspto-grants-2006_08
Patent number
US07094798B1

Reaction notes

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