Acetic Acid → 4-(2-Acetyl-3-oxobut-1-en-1-yl)-3-methoxybenzonitrile

HRID 1951375Notes

Reaction equation

HRID 1951375 reaction equation
[CH:1]([C:3]1[CH:10]=[CH:9][C:6]([C:7]#[N:8])=[CH:5][C:4]=1[O:11][CH3:12])=O.[CH3:13][C:14](=[O:19])[CH2:15][C:16](=[O:18])[CH3:17].C(O)(=O)C.N1CCCCC1>ClCCl>[C:16]([C:15]([C:14](=[O:19])[CH3:13])=[CH:1][C:3]1[CH:10]=[CH:9][C:6]([C:7]#[N:8])=[CH:5][C:4]=1[O:11][CH3:12])(=[O:18])[CH3:17]

Participants

6

Reactant 4

HCID 176Acetic AcidHCID 8082PiperidineHCID 31261AcetylacetoneHCID 166592514-Formyl-3-methoxybenzonitrile

Product 1

HCID 591869164-(2-Acetyl-3-oxobut-1-en-1-yl)-3-methoxybenzonitrile

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

21 g (130 mmol) of 4-formyl-3-methoxybenzonitrile, 14.7 ml (143 mmol) of 2,4-pentanedione, 11.2 ml (195 mmol) of acetic acid and 2.6 ml (26 mmol) of piperidine in 400 ml of dry dichloromethane are stirred under reflux with a water trap for 24 h. After cooling, the reaction solution is washed successively with saturated sodium bicarbonate solution and saturated sodium chloride solution. The organic phase is dried over magnesium sulfate and concentrated. The residue is recrystallized from diethyl ether. 23.2 g (92% of theory) of the title compound are obtained as a pale brown solid.

Workup

  1. temperatureunder reflux with a water trap for 24 h
  2. temperatureAfter cooling
  3. washthe reaction solution is washed successively with saturated sodium bicarbonate solution and saturated sodium chloride solution
  4. dry with materialThe organic phase is dried over magnesium sulfate
  5. concentrationconcentrated
  6. customThe residue is recrystallized from diethyl ether

Sources & evidence

ORD record
ord-7902c796ca9e4929bc8233ebfb11da6c
Source dataset
uspto-grants-2013_03
Patent number
US08404709B2

Reaction notes

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