Potassium Carbonate → 2-(2,4-Dimethoxy-benzyl)-4-(3-morpholin-4-yl-propoxy)-isoindole-1,3-dione

HRID 2412179Notes

Reaction equation

HRID 2412179 reaction equation
[CH3:1][O:2][C:3]1[CH:21]=[C:20]([O:22][CH3:23])[CH:19]=[CH:18][C:4]=1[CH2:5][N:6]1[C:14](=[O:15])[C:13]2[C:8](=[CH:9][CH:10]=[CH:11][C:12]=2[OH:16])[C:7]1=[O:17].Cl[CH2:25][CH2:26][CH2:27][N:28]1[CH2:33][CH2:32][O:31][CH2:30][CH2:29]1.C(=O)([O-])[O-].[K+].[K+]>CN(C=O)C.C(OCC)(=O)C>[CH3:1][O:2][C:3]1[CH:21]=[C:20]([O:22][CH3:23])[CH:19]=[CH:18][C:4]=1[CH2:5][N:6]1[C:14](=[O:15])[C:13]2[C:8](=[CH:9][CH:10]=[CH:11][C:12]=2[O:16][CH2:25][CH2:26][CH2:27][N:28]2[CH2:33][CH2:32][O:31][CH2:30][CH2:29]2)[C:7]1=[O:17]

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 958344-(3-Chloropropyl)morpholineHCID 592631282-(2,4-Dimethoxy-benzyl)-4-hydroxy-isoindole-1,3-dione

Product 1

HCID 592631552-(2,4-Dimethoxy-benzyl)-4-(3-morpholin-4-yl-propoxy)-isoindole-1,3-dioneYield 68%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
60 °C

Procedure

A mixture of 2-(2,4-dimethoxy-benzyl)-4-hydroxy-isoindole-1,3-dione (313 mg, 1.00 mmol), 4-(3-chloropropyl)morpholine (160 mg, 1.11 mmol) and potassium carbonate (350 mg, 2.5 mmol) in DMF (5 mL) was heated at 60° C. for 18 hours. The mixture was diluted with ethyl acetate and extracted twice with 1N hydrochloric acid. The aqueous extracts were made basic with solid potassium carbonate and extracted with ethyl acetate. The organic extract washed with brine, dried (MgSO4) and concentrated to give a yellow solid which was recrystallised from methanol/petrol then ethyl acetate/chloroform/petrol to give the title compound (298 mg, 68%) as an off-white solid. 1H NMR (methanol-d4) 7.72 (1H, t), 7.41 (1H, d), 7.39 (1H, d), 7.02 (1H, d), 6.51 (1H, d), 6.43 (1H, dd), 4.72 (2H, s), 4.27 (2H, t), 3.81 (3H, s), 3.76 (3H, s), 3.68 (4H, t), 2.61 (2H, t), 2.50 (4H, m), 2.05 (2H, qn). MS: [M+H]+ 441.

Workup

  1. extractionextracted twice with 1N hydrochloric acid
  2. extractionextracted with ethyl acetate
  3. extractionThe organic extract
  4. washwashed with brine
  5. dry with materialdried (MgSO4)
  6. concentrationconcentrated
  7. customto give a yellow solid which
  8. customwas recrystallised from methanol/petrol

Sources & evidence

ORD record
ord-22c5b18d29e04390b0fd3b635136938f
Source dataset
uspto-grants-2014_08
Patent number
US08816087B2

Reaction notes

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