N-Methylphthalimide → 3-hydroxy-2-methyl-2,3-dihydro-1H-isoindol-1-one

HRID 750638Notes

Reaction equation

HRID 750638 reaction equation
[BH4-].[Na+].[CH3:3][N:4]1[C:12](=[O:13])[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[C:5]1=[O:14]>CO>[OH:13][CH:12]1[C:11]2[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=2)[C:5](=[O:14])[N:4]1[CH3:3]

Participants

4

Reactant 2

HCID 11074N-MethylphthalimideHCID 4311764Sodium borohydride2×

Product 1

HCID 27525883-hydroxy-2-methyl-2,3-dihydro-1H-isoindol-1-oneYield 32.5%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Conditions

Temperature
0 °C

Procedure

NaBH4 (566 mg, 14.91 mmol) was added to a stirring solution of 2-methyl-isoindole-1,3-dione (2.0 g, 12.42 mmol) in methanol (20 mL) at 0° C. Stirring at 0° C. was maintained for 1 hour, then the reaction was warmed to room temperature. Additional NaBH4 (566 mg, 14.91 mmol) was added in order to push the reaction to completion. The reaction was then quenched with acetic acid (5 mL) and partitioned between water and dichloromethane. The organic layer was washed several times with water and concentrated under vacuum to give 659 mg of the sub-title compound as a white solid. MS: ESI (positive): 164 (M+H).

Workup

  1. temperaturewas maintained for 1 hour
  2. temperaturethe reaction was warmed to room temperature
  3. customthe reaction to completion
  4. customThe reaction was then quenched with acetic acid (5 mL)
  5. custompartitioned between water and dichloromethane
  6. washThe organic layer was washed several times with water
  7. concentrationconcentrated under vacuum

Sources & evidence

ORD record
ord-360f565a6cb1457ab11a4310c4e227cc
Source dataset
uspto-grants-2008_07
Patent number
US07405215B2

Reaction notes

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