Diethyl Malonate → 1,3-Diethyl 2-(3-oxocyclohexyl)propanedioate

HRID 523279

Reaction equation

HRID 523279 reaction equation
[C:1]1(=[O:7])[CH2:6][CH2:5][CH2:4][CH:3]=[CH:2]1.[C:8]([O:16][CH2:17][CH3:18])(=[O:15])[CH2:9][C:10]([O:12][CH2:13][CH3:14])=[O:11].N12CCCN=C1CCCCC2.CCOC(C)=O>C1COCC1>[O:7]=[C:1]1[CH2:6][CH2:5][CH2:4][CH:3]([CH:9]([C:10]([O:12][CH2:13][CH3:14])=[O:11])[C:8]([O:16][CH2:17][CH3:18])=[O:15])[CH2:2]1

Participants

6

Reactant 4

HCID 7761Diethyl MalonateHCID 8857Ethyl AcetateHCID 135942-Cyclohexen-1-oneHCID 811841,8-Diazabicyclo(5.4.0)undec-7-ene

Product 1

HCID 3170491,3-Diethyl 2-(3-oxocyclohexyl)propanedioateYield 104%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
50 °C

Procedure

A solution of cyclohex-2-enone (3.05 mL, 30 mmol) and diethyl malonate (4.58 mL, 30.0 mmol) in THF (30 mL) was treated with 1,8-diazabicyclo[5.4.0]undec-7-ene (4.52 mL, 30.0 mmol) and heated at 50° C. for 16 h. The cooled mixture was poured into EtOAc and washed sequentially with 1M aqueous HCl and brine. The combined aqueous layers were extracted with EtOAc, and the combined organic phases were dried and concentrated to give diethyl 2-(3-oxocyclohexyl)malonate as an oil (8.0 g), used without further purification. Mass spectrum m/z 257 (M+H)+.

Workup

  1. washwashed sequentially with 1M aqueous HCl and brine
  2. extractionThe combined aqueous layers were extracted with EtOAc
  3. customthe combined organic phases were dried
  4. concentrationconcentrated

Sources & evidence

ORD record
ord-a2ea0672ee5743b9ad4173f2ddb94550
Source dataset
uspto-grants-2016_05
Patent number
US09334290B2

Linked notes

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