5-(3-Methoxyphenyl)-2-pyrrolidinone → 2-(3-Methoxyphenyl)pyrrolidine

HRID 1654026Notes

Reaction equation

HRID 1654026 reaction equation
[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH:9]2[NH:13][C:12](=O)[CH2:11][CH2:10]2)[CH:6]=[CH:7][CH:8]=1.[H-].[Al+3].[Li+].[H-].[H-].[H-]>O1CCCC1>[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH:9]2[CH2:10][CH2:11][CH2:12][NH:13]2)[CH:6]=[CH:7][CH:8]=1

Participants

4

Reactant 2

HCID 152932255-(3-Methoxyphenyl)-2-pyrrolidinoneHCID 21226445Aluminium lithium hydride

Product 1

HCID 36138242-(3-Methoxyphenyl)pyrrolidineYield 97.1%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

To a solution of 5-(3-methoxyphenyl)-2-pyrrolidinone (7.0 g) in dry tetrahydrofuran (280 ml) was added 1M lithium aluminum hydride in tetrahydrofuran (55 ml) dropwise at ambient temperature, under nitrogen. The reaction mixture was warmed under reflux for 2 hrs, cooled to ambient temperature, and quenched with 10% aqueous tetrahydrofuran (60 ml), followed by 10% sodium hydroxide solution (50 ml). The suspension was filtered through a pad of celite, and the filter cake was washed with dichloromethane. The combined filtrates were concentrated, dried over anhydrous potassium carbonate and filtered. The filtrate was concentrated to give 6.3 g (96%) of 2-(3-methoxyphenyl)pyrrolidine.

Workup

  1. temperatureThe reaction mixture was warmed
  2. temperatureunder reflux for 2 hrs
  3. customquenched with 10% aqueous tetrahydrofuran (60 ml)
  4. filtrationThe suspension was filtered through a pad of celite
  5. washthe filter cake was washed with dichloromethane
  6. concentrationThe combined filtrates were concentrated
  7. dry with materialdried over anhydrous potassium carbonate
  8. filtrationfiltered
  9. concentrationThe filtrate was concentrated

Sources & evidence

ORD record
ord-8c92ec6d9d374f528d33cb369db4b426
Source dataset
uspto-grants-1995_04
Patent number
US05405845

Reaction notes

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