4-Hydroxybenzaldehyde → 1,5-Bis(4-hydroxyphenyl)-1,4-pentadien-3-one

HRID 77651Notes

Reaction equation

HRID 77651 reaction equation
[OH:1][C:2]1[CH:9]=[CH:8][C:5]([CH:6]=O)=[CH:4][CH:3]=1.[CH3:10][C:11]([CH3:13])=[O:12].[OH-:14].[Na+].O>C(O)C>[OH:1][C:2]1[CH:9]=[CH:8][C:5]([CH:6]=[CH:9][C:2](=[O:14])[CH:3]=[CH:4][C:5]2[CH:8]=[CH:13][C:11]([OH:12])=[CH:10][CH:6]=2)=[CH:4][CH:3]=1

Participants

6

Reactant 4

HCID 1264-HydroxybenzaldehydeHCID 180AcetoneHCID 962WaterHCID 14798Sodium Hydroxide

Product 1

HCID 1074411,5-Bis(4-hydroxyphenyl)-1,4-pentadien-3-oneYield 39%

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

4-Hydroxybenzaldehyde (1f, 2.00 g, 16.4 mmol) and acetone (19, 0.61 ml, 8.3 mmol) were combined in ethanol (30 ml) and stirred for 15 min at room temperature. A solution of sodium hydroxide (1.00 g, 25.0 mmol) and water (30 ml) was added and the mixture stirred for 4 hr at room temperature. The resulting mixture was extracted into ethyl acetate, washed with saturated sodium chloride, dried over magnesium sulfate, filtered and evaporated to afford a solid. The crude solid was recrystallized from ethyl acetate/hexane to give 0.85 g (39%) of a yellow solid: mp 235-237° C. [expected mp 238-239° C.]; 1H NMR: (DMSO) δ 6.82 (d, 4H, J=8.5 Hz), 7.08 (d, 2H, J=16.1 Hz), 7.61 (d, 4H, J=8.5 Hz), 7.64 (d, 2H, J=15.7 Hz), 10.08 (s, 2H); 13C NMR: (DMSO) δ 115.8, 122.6, 125.7, 130.3, 142.3, 159.7, 187.9.

Workup

  1. stirringthe mixture stirred for 4 hr at room temperature
  2. extractionThe resulting mixture was extracted into ethyl acetate
  3. washwashed with saturated sodium chloride
  4. dry with materialdried over magnesium sulfate
  5. filtrationfiltered
  6. customevaporated
  7. customto afford a solid
  8. customThe crude solid was recrystallized from ethyl acetate/hexane

Sources & evidence

ORD record
ord-38ef19483689431db45d9fc629d8d911
Source dataset
uspto-grants-2014_09
Patent number
US08841326B2

Reaction notes

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