Ethyl bromoacetate → Ethyl 2-(tetramethylcyclopentadienyl)acetate

HRID 1941440Notes

Reaction equation

HRID 1941440 reaction equation
Br[CH2:2][C:3]([O:5][CH2:6][CH3:7])=[O:4].[CH3:8][C:9]1[CH-:13][C:12]([CH3:14])=[C:11]([CH3:15])[C:10]=1[CH3:16].[Na+]>C1COCC1>[CH3:8][C:9]1[CH:13]([CH2:2][C:3]([O:5][CH2:6][CH3:7])=[O:4])[C:12]([CH3:14])=[C:11]([CH3:15])[C:10]=1[CH3:16]

Participants

4

Reactant 2

HCID 7748Ethyl bromoacetateHCID 15823254Tetramethylcyclopentadienylsodium

Product 1

HCID 85614880Ethyl 2-(tetramethylcyclopentadienyl)acetate

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

A solution of 3.822 g (22.89 mmol)ethyl bromoacetate in 25 mL THF was cooled to -78° C. and 3.000 g (20.80 g) sodium tetramethylcyclopentadienide in 50 mL THF was slowly added to it. The resulting slurry was allowed to warm to room temperature and was stirred overnight. The solvent was removed, the residue was extracted with pentane and filtered. The pentane was removed to give a mixture of isomers. Yield was 3.733 g (86.3%). Mass spectra m/e 208 (41 percent).

Workup

  1. customThe solvent was removed
  2. extractionthe residue was extracted with pentane
  3. filtrationfiltered
  4. customThe pentane was removed
  5. customto give
  6. additiona mixture of isomers

Sources & evidence

ORD record
ord-cf0f24f33fd344a296270a7eb0a13225
Source dataset
uspto-grants-1997_12
Patent number
US05703187

Reaction notes

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