Benzenepropanoyl chloride → (S)-4-BENZYL-3-(3-PHENYLPROPANOYL)OXAZOLIDIN-2-ONE

HRID 504266Notes

Reaction equation

HRID 504266 reaction equation
C([Li])CCC.[CH2:6]([C@H:13]1[CH2:17][O:16][C:15](=[O:18])[NH:14]1)[C:7]1[CH:12]=[CH:11][CH:10]=[CH:9][CH:8]=1.[C:19]1([CH2:25][CH2:26][C:27](Cl)=[O:28])[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1>C1COCC1>[CH2:6]([C@H:13]1[CH2:17][O:16][C:15](=[O:18])[N:14]1[C:27](=[O:28])[CH2:26][CH2:25][C:19]1[CH:24]=[CH:23][CH:22]=[CH:21][CH:20]=1)[C:7]1[CH:8]=[CH:9][CH:10]=[CH:11][CH:12]=1

Participants

5

Reactant 3

HCID 64801Benzenepropanoyl chlorideHCID 736225(S)-4-Benzyl-2-oxazolidinoneHCID 178418339Butyllithium

Product 1

HCID 10957844(S)-4-BENZYL-3-(3-PHENYLPROPANOYL)OXAZOLIDIN-2-ONE

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

1.6 M of n-Butyllithium in hexanes (35 mL) was added to a solution of (S)-4-benzyloxazolidin-2-one (10 g, 56.4 mmol) in THF (150 mL) at −78° C. After 15 minutes, intermediate (7a) (9.5 g, 56.4 mmol) in THF (20 mL) was added dropwise at −78° C. After 30 minutes, the mixture was allowed to warm to room temperature and was stirred overnight. The mixture was concentrated in vacuo and the crude material was extracted with EtOAc (3×200 mL) and water (100 mL). The combined organic extracts were dried over Na2SO4, filtered, and concentrated in vacuo to yield intermediate (7b), which was used in the next step without further purification.

Workup

  1. waitAfter 30 minutes
  2. concentrationThe mixture was concentrated in vacuo
  3. extractionthe crude material was extracted with EtOAc (3×200 mL) and water (100 mL)
  4. dry with materialThe combined organic extracts were dried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-95627dacd22e428ab4e200156240e36f
Source dataset
uspto-grants-2010_08
Patent number
US07777077B2

Reaction notes

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