N-Hydroxyphthalimide → 2-[3-(2-propyl-1H-imidazo[4,5-c][1,5]naphthyridin-1-yl)propoxy]-1H-isoindole-1,3(2H)-dione

HRID 1992592Notes

Reaction equation

HRID 1992592 reaction equation
N(C(OC(C)C)=O)=NC(OC(C)C)=O.[CH2:15]([C:18]1[N:19]([CH2:31][CH2:32][CH2:33][OH:34])[C:20]2[C:29]3[N:28]=[CH:27][CH:26]=[CH:25][C:24]=3[N:23]=[CH:22][C:21]=2[N:30]=1)[CH2:16][CH3:17].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.O[N:55]1[C:59](=[O:60])[C:58]2=[CH:61][CH:62]=[CH:63][CH:64]=[C:57]2[C:56]1=[O:65]>O1CCCC1.C(OCC)(=O)C.ClCCl>[CH2:15]([C:18]1[N:19]([CH2:31][CH2:32][CH2:33][O:34][N:55]2[C:59](=[O:60])[C:58]3[C:57](=[CH:64][CH:63]=[CH:62][CH:61]=3)[C:56]2=[O:65])[C:20]2[C:29]3[N:28]=[CH:27][CH:26]=[CH:25][C:24]=3[N:23]=[CH:22][C:21]=2[N:30]=1)[CH2:16][CH3:17]

Participants

8

Reactant 4

HCID 10665N-HydroxyphthalimideHCID 11776TriphenylphosphineHCID 75555Diisopropyl diazene-1,2-dicarboxylateHCID 685386673-(2-propyl-1H-imidazo[4,5-c][1,5]naphthyridin-1-yl)propan-1-ol

Product 1

HCID 685404202-[3-(2-propyl-1H-imidazo[4,5-c][1,5]naphthyridin-1-yl)propoxy]-1H-isoindole-1,3(2H)-dioneYield 103.8%

Reagents, catalysts & solvents 3

HCID 6344DichloromethaneSolventHCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Procedure

Diisopropyl azodicarboxylate (8.10 mL, 48.4 mmol) was added dropwise over ten minutes to a stirred solution of 3-(2-propyl-1H-imidazo[4,5-c][1,5]naphthyridin-1-yl)propan-1-ol (10.9 g, 40.3 mmol), triphenylphosphine (12.7 g, 48.4 mmol), and N-hydroxyphthalimide (7.89 g, 48.4 mmol) in tetrahydrofuran (160 mL) at 0° C. The reaction was allowed to warm to room temperature and was stirred overnight. The solvent was removed under reduced pressure to afford an oil that was dissolved in ethyl acetate (200 mL) and extracted with 2 M HCl (3×100 mL). The aqueous layers were combined, and solid sodium bicarbonate was added to adjust the pH to 7. A precipitate formed that was isolated by filtration and dissolved in dichloromethane (300 mL). The solution was dried over magnesium sulfate, filtered, and concentrated to afford 17.38 g of 2-[3-(2-propyl-1H-imidazo[4,5-c][1,5]naphthyridin-1-yl)propoxy]-1H-isoindole-1,3(2H)-dione as a tan solid.

Workup

  1. customThe solvent was removed under reduced pressure
  2. customto afford an oil that
  3. extractionextracted with 2 M HCl (3×100 mL)
  4. additionsolid sodium bicarbonate was added
  5. customA precipitate formed
  6. customthat was isolated by filtration
  7. dry with materialThe solution was dried over magnesium sulfate
  8. filtrationfiltered
  9. concentrationconcentrated

Sources & evidence

ORD record
ord-36e3229cf6674b25b5a38a9c8633d3b2
Source dataset
uspto-grants-2010_01
Patent number
US07648997B2

Reaction notes

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