Phthalimide → 2-(6-Phenoxy-benzofuran-2-ylmethyl)-isoindole-1,3-dione

HRID 1171210Notes

Reaction equation

HRID 1171210 reaction equation
[O:1]([C:8]1[CH:18]=[CH:17][C:11]2[CH:12]=[C:13]([CH2:15]O)[O:14][C:10]=2[CH:9]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:19]1(=[O:29])[NH:23][C:22](=[O:24])[C:21]2=[CH:25][CH:26]=[CH:27][CH:28]=[C:20]12.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.CCOC(/N=N/C(OCC)=O)=O>O.O1CCCC1>[O:1]([C:8]1[CH:18]=[CH:17][C:11]2[CH:12]=[C:13]([CH2:15][N:23]3[C:19](=[O:29])[C:20]4[C:21](=[CH:25][CH:26]=[CH:27][CH:28]=4)[C:22]3=[O:24])[O:14][C:10]=2[CH:9]=1)[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

7

Reactant 4

HCID 6809PhthalimideHCID 11776TriphenylphosphineHCID 5462977Diethyl azodicarboxylateHCID 57608210(6-Phenoxy-benzofuran-2-yl)-methanol

Product 1

HCID 576082842-(6-Phenoxy-benzofuran-2-ylmethyl)-isoindole-1,3-dioneYield 77%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8028TetrahydrofuranSolvent

Procedure

To a tetrahydrofuran (4 mL) solution of (6-phenoxy-benzofuran-2-yl)-methanol (177 mg, 737 μmol) described in Production Example 49-1-2 were added phthalimide (119 mg, 811 μmol), triphenylphosphine (232 mg, 884 μmol) and diethylazodicarboxylate (403 μL, 884 mmol) at 0° C., which was stirred at room temperature for 4 hours and 30 minutes. Water was added to the reaction solution followed by extraction with ethyl acetate. The organic layer was washed with sat. NaCl followed by drying over anhydrous magnesium sulfate and filtering. The filtrate was concentrated under a reduced pressure and the residue was purified by NH silica gel column chromatography (hexane:ethyl acetate=5:1) to obtain the title compound (209 mg, 77%) as a colorless oil.

Workup

  1. extractionfollowed by extraction with ethyl acetate
  2. washThe organic layer was washed with sat. NaCl
  3. dry with materialby drying over anhydrous magnesium sulfate
  4. filtrationfiltering
  5. concentrationThe filtrate was concentrated under a reduced pressure
  6. customthe residue was purified by NH silica gel column chromatography (hexane:ethyl acetate=5:1)

Sources & evidence

ORD record
ord-fe5d7a0bd6964dcda982f26f9b88b17f
Source dataset
uspto-grants-2010_11
Patent number
US07829585B2

Reaction notes

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