2,3-Dibromopropene → HCID 86631525, compound

HRID 335225Notes

Reaction equation

HRID 335225 reaction equation
[O:1]=[C:2]1[CH2:6][CH2:5][CH2:4][N:3]1[C:7]([O:9][C:10]([CH3:13])([CH3:12])[CH3:11])=[O:8].C([N-]C(C)C)(C)C.[Li+].[Br:22][C:23]([CH2:25]Br)=[CH2:24]>C1COCC1>[Br:22][C:23](=[CH2:24])[CH2:25][CH:6]1[CH2:5][CH2:4][N:3]([C:7]([O:9][C:10]([CH3:13])([CH3:12])[CH3:11])=[O:8])[C:2]1=[O:1]

Participants

5

Reactant 3

HCID 105522,3-DibromopropeneHCID 3790001-Pyrrolidinecarboxylic acid, 2-oxo-, 1,1-dimethylethyl esterHCID 2724682Lithium diisopropylamide

Product 1

HCID 86631525HCID 86631525, compoundYield 8.3%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
-78 °C

Procedure

In a 250 mL round-bottom flask, tert-butyl 2-oxopyrrolidine-1-carboxylate (4.12 g, 22.2 mmol) was combined with 25 mL of THF and cooled to −78° C. Lithium diisopropylamide (1.5M in THF) (14.8 mL, 22.2 mmol) was added slowly and the mixture was agitated for 30 minutes. 2,3-Dibromopropene (2.72 mL, 22.2 mmol) was added and the mixture was agitated overnight and allowed to warm to ambient temperature. The reaction was then quenched with sodium bicarbonate solution and extracted twice with ether. The extracts were washed with brine and evaporated. The crude product was purified by column chromatography, eluting with 20% ethyl acetate/hexane, to provide the title compound (0.560 g, 8.3% yield).

Workup

  1. stirringthe mixture was agitated overnight
  2. temperatureto warm to ambient temperature
  3. customThe reaction was then quenched with sodium bicarbonate solution
  4. extractionextracted twice with ether
  5. washThe extracts were washed with brine
  6. customevaporated
  7. customThe crude product was purified by column chromatography
  8. washeluting with 20% ethyl acetate/hexane

Sources & evidence

ORD record
ord-0d5392fc98bf426ab2f3d8e23e00d750
Source dataset
uspto-grants-2014_11
Patent number
US08883828B2

Reaction notes

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