Hydrochloric Acid → n-Butyl cyclopropyl ketone

HRID 127078Notes

Reaction equation

HRID 127078 reaction equation
[CH:1]1([C:4]([OH:6])=O)[CH2:3][CH2:2]1.[CH2:7]([Li])[CH2:8][CH2:9][CH3:10].Cl>CCOCC>[CH:1]1([C:4]([CH2:7][CH2:8][CH2:9][CH3:10])=[O:6])[CH2:3][CH2:2]1

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 15655Cyclopropanecarboxylic acidHCID 178418339Butyllithium

Product 1

HCID 11029852n-Butyl cyclopropyl ketone

Reagents, catalysts & solvents 1

HCID 3283Diethyl EtherSolvent2×

Procedure

To a vigorously-stirred solution of 31.0 g of cyclopropanecarboxylic acid in 330 ml of ether is added a solution of n-butyllithium (748 mmoles) in about 750 ml of 2:1 ether-hexane during one hour at 5°-10° C. The resulting suspension is diluted with 300 ml of ether and stirred at room temperature for 2 hours and at reflux for 2 hours. The mixture is cooled and poured into several portions of 1:1 ice:4 N hydrochloric acid. The ethereal phases are combined and washed with brine, sodium carbonate solution, and brine. The extract is dried over magnesium sulfate and concentrated. The residue is distilled to provide a liquid, bp-102°-104° C. (80 mm), pmr spectrum (CDCl3): δ2.55 (triplet, --CH2CO--).

Workup

  1. temperatureat reflux for 2 hours
  2. temperatureThe mixture is cooled
  3. additionpoured into several portions of 1:1 ice
  4. washwashed with brine, sodium carbonate solution, and brine
  5. dry with materialThe extract is dried over magnesium sulfate
  6. concentrationconcentrated
  7. distillationThe residue is distilled
  8. customto provide a liquid, bp-102°-104° C. (80 mm), pmr spectrum (CDCl3)

Sources & evidence

ORD record
ord-59a39c1fda054c1fb01ff88488a429b4
Source dataset
uspto-grants-1981_03
Patent number
US04254285

Reaction notes

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