Sodium hydride → Methyl 2-fluoro-5-nitro-3-(2-oxo-1-pyrrolidinyl)benzoate

HRID 852582Notes

Reaction equation

HRID 852582 reaction equation
Cl[CH2:2][CH2:3][CH2:4][C:5]([NH:7][C:8]1[C:9]([F:21])=[C:10]([CH:15]=[C:16]([N+:18]([O-:20])=[O:19])[CH:17]=1)[C:11]([O:13][CH3:14])=[O:12])=[O:6].[H-].[Na+]>C1COCC1.CCOC(C)=O>[F:21][C:9]1[C:8]([N:7]2[CH2:2][CH2:3][CH2:4][C:5]2=[O:6])=[CH:17][C:16]([N+:18]([O-:20])=[O:19])=[CH:15][C:10]=1[C:11]([O:13][CH3:14])=[O:12]

Participants

5

Reactant 2

HCID 24758Sodium hydrideHCID 69358882Methyl 3-[(4-chlorobutanoyl)amino]-2-fluoro-5-nitrobenzoate

Product 1

HCID 69360218Methyl 2-fluoro-5-nitro-3-(2-oxo-1-pyrrolidinyl)benzoateYield 43.8%

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of methyl 3-[(4-chlorobutanoyl)amino]-2-fluoro-5-nitrobenzoate (D139) (8.5 g, 26.7 mmol, 1 equiv) in THF (100 ml) was added NaH (60% dispersion in mineral oil, 1.17 g, 29.4 mmol, 1.1 equiv) and the resulting mixture was stirred at room temperature for 1.5 h then diluted with AcOEt. The organic phase was washed with H2O, dried over MgSO4 and concentrated in vacuo. Purification of the residue by flash chromatography on silica gel (iso-hexane/AcOEt: 2/1) gave methyl 2-fluoro-5-nitro-3-(2-oxo-1-pyrrolidinyl)benzoate (D140) (3.3 g, 43%) as a yellow solid. [M+H]+=283.1, RT=2.53 min.

Workup

  1. washThe organic phase was washed with H2O
  2. dry with materialdried over MgSO4
  3. concentrationconcentrated in vacuo
  4. customPurification of the residue by flash chromatography on silica gel (iso-hexane/AcOEt: 2/1)

Sources & evidence

ORD record
ord-55f0fd4440af41af8f5e2815f87c9a9a
Source dataset
uspto-grants-2007_08
Patent number
US07253198B2

Reaction notes

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