Hydrochloric Acid → 1-(4-Chlorophenyl)-4,4,4-trifluorobutane-1,3-dione

HRID 2298384Notes

Reaction equation

HRID 2298384 reaction equation
[F:1][C:2]([F:9])([F:8])[C:3]([O:5]CC)=O.C[O-].[Na+].[Cl:13][C:14]1[CH:19]=[CH:18][C:17]([C:20](=[O:22])[CH3:21])=[CH:16][CH:15]=1.Cl>C(OC)(C)(C)C>[F:9][C:2]([F:1])([F:8])[C:3](=[O:5])[CH2:21][C:20]([C:17]1[CH:18]=[CH:19][C:14]([Cl:13])=[CH:15][CH:16]=1)=[O:22]

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 7467P-ChloroacetophenoneHCID 9794Ethyl trifluoroacetateHCID 10942334Sodium Methoxide

Product 1

HCID 27738321-(4-Chlorophenyl)-4,4,4-trifluorobutane-1,3-dioneYield 93.3%

Reagents, catalysts & solvents 1

HCID 15413tert-Butyl methyl etherSolvent2×

Procedure

Ethyl trifluoroacetate (23.52 g, 166 mmol) was placed in a 500 mL three-necked round bottom flask, and dissolved in methyl tert-butyl ether (75 mL). To the stirred solution was added 25% sodium methoxide (40 mL, 177 mmol) via an addition funnel over a 2 minute period. Next 4′-chloroacetophenone (23.21 g, 150 mmol) was dissolved in methyl tert-butyl ether (20 mL, and added to the reaction dropwise over 5 minutes. After stirring overnight (15.75 hours), 3N HCl (70 mL) was added. The organic layer was collected, washed with brine (75 mL), dried over MgSO4, filtered, and concentrated in vacuo to give a 35.09 g of yellow-orange solid. The solid was recrystallized from iso-octane to give 31.96 g (85%) of the dione: mp 66-67° C.

Workup

  1. additionadded to the reaction dropwise over 5 minutes
  2. additionwas added
  3. customThe organic layer was collected
  4. washwashed with brine (75 mL)
  5. dry with materialdried over MgSO4
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-8e5169eb336840fca8886b603ff05d0d
Source dataset
uspto-grants-2002_12
Patent number
US06492411B1

Reaction notes

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