Acetone → 1,5-Bis(2-methylphenyl)-1,4-pentadien-3-one

HRID 714179Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 714179
[CH3:1][C:2]1[CH:9]=[CH:8][CH:7]=[CH:6][C:3]=1[CH:4]=O.[CH3:10][C:11]([CH3:13])=[O:12].[OH-].[Na+].O>C(O)C>[CH3:1][C:2]1[CH:9]=[CH:8][CH:7]=[CH:6][C:3]=1[CH:4]=[CH:10][C:11](=[O:12])[CH:13]=[CH:1][C:2]1[CH:9]=[CH:8][CH:7]=[CH:6][C:3]=1[CH3:4]

Komponenten

6

Edukt 4

HCID 180AcetoneHCID 962WaterHCID 107222-MethylbenzaldehydeHCID 14798Sodium Hydroxide

Produkt 1

HCID 45639421,5-Bis(2-methylphenyl)-1,4-pentadien-3-oneAusbeute 43,3 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 702EthanolLösungsmittel

Versuchsvorschrift

2-Methylbenzaldehyde (1ac, 1.45 ml, 12.5 mmol) and acetone (19, 0.46 ml, 6.3 mmol) were combined in ethanol (20 ml) and stirred for 15 min at room temperature. A solution of sodium hydroxide (2.61 g, 65.3 mmol) and water (25 ml) was added and the mixture stirred for 3 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 ethanol to give 0.71 g (43%) of a yellow solid: mp 98-100° C. [expected mp 94-96° C.]; 1H NMR: δ 2.47 (s, 6H), 6.98 (d, 2H, J=15.9 Hz), 7.24 (m, 6H), 7.64 (d, 2H, J=7.2 Hz), 8.03 (d, 2H, J=15.9 Hz); 13C NMR: δ 19.7, 126.1, 126.2, 126.5, 129.9, 130.7, 133.6, 137.9, 140.5, 188.5.

Aufarbeitung

  1. stirringthe mixture stirred for 3 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 ethanol

Quellen und Nachweise

ORD-Eintrag
ord-86a3e5959b704d6aba45fb3efda5f2b0
Quelldatensatz
uspto-grants-2015_11
Patentnummer
US09187397B2

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