Sodium hydride → 1-Benzyl-3-(2-methoxycarbonylvinyl)pyrrole

HRID 1167976Notes

Reaction equation

HRID 1167976 reaction equation
[H-].[Na+].C(OP([CH2:11][C:12]([O:14][CH3:15])=[O:13])(=O)OCC)C.[CH2:16]([N:23]1[CH:27]=[CH:26][C:25]([CH:28]=O)=[CH:24]1)[C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1>CN(C=O)C>[CH2:16]([N:23]1[CH:27]=[CH:26][C:25]([CH:28]=[CH:11][C:12]([O:14][CH3:15])=[O:13])=[CH:24]1)[C:17]1[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=1

Participants

5

Reactant 3

HCID 24758Sodium hydrideHCID 66113Methyl diethylphosphonoacetateHCID 156784801-Benzyl-1H-pyrrole-3-carbaldehyde

Product 1

HCID 691390211-Benzyl-3-(2-methoxycarbonylvinyl)pyrroleYield 83%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent3×

Procedure

To a suspension of sodium hydride (60% in mineral oil, 311 mg, 7.8 mmol) in DMF (15 ml) was added dropwise at an ice bath temperature a solution of diethyl(methoxycarbonylmethyl)phosphonate (1.64 g, 7.8 mmol) in DMF (3 ml). The mixture was stirred for 30 minutes at room temperature and cooled again. To the mixture was added dropwise a solution of 1-benzyl-3-formylpyrrole (1.2 g, 6.5 mmol) in DMF (2 ml). The reaction mixture was stirred for 12 hours at room temperature and poured into ice-water, and extracted with ethylacetate. The extract was washed with water and dried. The solvent was evaporated. The obtained white crystal was washed with i-Pr2O to give 1-benzyl-3-(2-methoxycarbonylvinyl)pyrrole (1.3 g). Yield: 83%.

Workup

  1. temperaturecooled again
  2. stirringThe reaction mixture was stirred for 12 hours at room temperature
  3. extractionextracted with ethylacetate
  4. washThe extract was washed with water
  5. customdried
  6. customThe solvent was evaporated
  7. washThe obtained white crystal was washed with i-Pr2O

Sources & evidence

ORD record
ord-62e06f091e564f018858003fe2b0971c
Source dataset
uspto-grants-2003_09
Patent number
US06620841B1

Reaction notes

Loading…