Sodium Carbonate → HCID 86745294, compound

HRID 1440109Notes

Reaction equation

HRID 1440109 reaction equation
[CH2:1]([N:8]1[CH2:12][C:11](=O)[CH:10]([C:14]([O:16][CH2:17][CH3:18])=[O:15])[CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.Cl.[NH2:20][OH:21].C(=O)([O-])[O-].[Na+].[Na+]>C(O)C.O>[CH2:1]([N:8]1[CH2:12][C:11](=[N:20][OH:21])[CH:10]([C:14]([O:16][CH2:17][CH3:18])=[O:15])[CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

6

Reactant 3

HCID 10340Sodium CarbonateHCID 274831Ethyl 1-benzyl-4-oxopyrrolidine-3-carboxylateHCID 443297Hydroxyamine hydrochloride

Product 1

HCID 86745294HCID 86745294, compoundYield 60.2%

Reagents, catalysts & solvents 2

HCID 702EthanolSolventHCID 962WaterSolvent

Procedure

A solution of 24.7 g (0.1 mole) of 1-benzyl-3-ethoxycarbonyl-4-pyrrolidone in 135 ml of ethanol was added dropwise at room temperature to a solution of 34.7 g (0.5 mole) of hydroxylamine hydrochloride dissolved in 135 ml of water, and then 28.1 g (0.265 mole) of sodium carbonate were added to the mixture. The mixture was then stirred at room temperature for 6.5 hours, after which it was extracted with 300 ml of chloroform. The chloroform extract was washed with water and dried over anhydrous sodium sulfate. It was then concentrated by evaporation under reduced pressure. The residue was purified by column chromatography through silica gel using a 2:1 by volume mixture of toluene and ethyl acetate as the eluent, to afford 15.8 g of 1-benzyl-3-ethoxycarbonyl-4-hydroxyiminopyrrolidine as a brown oil.

Workup

  1. extractionafter which it was extracted with 300 ml of chloroform
  2. extractionThe chloroform extract
  3. washwas washed with water
  4. dry with materialdried over anhydrous sodium sulfate
  5. concentrationIt was then concentrated by evaporation under reduced pressure
  6. customThe residue was purified by column chromatography through silica gel using a 2:1
  7. additionby volume mixture of toluene and ethyl acetate as the eluent

Sources & evidence

ORD record
ord-fd2426c951e847a89d787c10f95f4f89
Source dataset
uspto-grants-1996_03
Patent number
US05496951

Reaction notes

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