Acetic Acid → 4-Carboxybutylcyclopentan-1-one

HRID 847818Notes

Reaction equation

HRID 847818 reaction equation
[C:1]([CH2:6][CH2:7][CH2:8][CH2:9][CH:10]1[CH2:14][CH2:13][CH2:12][C:11]1=[O:15])([O:3]CC)=[O:2].Cl.C(O)(=O)C>O>[C:1]([CH2:6][CH2:7][CH2:8][CH2:9][CH:10]1[CH2:14][CH2:13][CH2:12][C:11]1=[O:15])([OH:3])=[O:2]

Participants

5

Reactant 3

HCID 176Acetic AcidHCID 313Hydrochloric AcidHCID 130462922-(4-Carbethoxybutyl)cyclopentan-1-one

Product 1

HCID 135134014-Carboxybutylcyclopentan-1-one

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

A stirred mixture of 274 g. of 2-carbalkoxy (mixed methyl and ethyl esters)-2-(4-carbethoxybutyl)cyclopentan-1-one (Example 4), 600 ml. of 20% hydrochloric acid and 325 ml. of acetic acid is heated at reflux for 20 hours. Solution occurs in approximately 1/2 hour. The solution is cooled and diluted with water and extracted with ether. The combined extracts are washed with saline and dried over magnesium sulfate and evaporated. The residue is evaporated twice with toluene to give 144 g. of an oil.

Workup

  1. additionA stirred mixture of 274 g
  2. temperatureat reflux for 20 hours
  3. temperatureThe solution is cooled
  4. extractionextracted with ether
  5. washThe combined extracts are washed with saline
  6. dry with materialdried over magnesium sulfate
  7. customevaporated
  8. customThe residue is evaporated twice with toluene
  9. customto give 144 g

Sources & evidence

ORD record
ord-1dd3d6ac30ae44808d5e1b690f3feb9f
Source dataset
uspto-grants-1981_10
Patent number
US04293704

Reaction notes

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