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

HRID 1947239Notes

Reaction equation

HRID 1947239 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-736ffb9a1a5b4fc2bcd3fd8c5983c822
Source dataset
uspto-grants-2013_03
Patent number
US08399471B2

Reaction notes

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