Sodium Chloride → 2-Methyl-2-phenyl-5-[2-(3-thienyl)ethenyl]-3(2H)-furanone

HRID 359382

Reaktionsgleichung

Reaktionsgleichung von HRID 359382
[S:1]1[CH:5]=[CH:4][C:3]([CH:6]=O)=[CH:2]1.[CH3:8][C:9]1([C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)[C:13](=[O:14])[CH:12]=[C:11]([CH3:15])[O:10]1.[OH-].[Na+].[Cl-].[Na+]>C(O)C>[CH3:8][C:9]1([C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)[C:13](=[O:14])[CH:12]=[C:11]([CH:15]=[CH:6][C:3]2[CH:4]=[CH:5][S:1][CH:2]=2)[O:10]1

Komponenten

6

Edukt 4

HCID 5234Sodium ChlorideHCID 14798Sodium HydroxideHCID 681353-ThiophenecarboxaldehydeHCID 150866992,5-dimethyl-2-phenyl-3(2H)-furanone

Produkt 1

HCID 543182742-Methyl-2-phenyl-5-[2-(3-thienyl)ethenyl]-3(2H)-furanoneAusbeute 71,1 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 702EthanolLösungsmittel

Versuchsvorschrift

To a solution of 3-thiophenecarboxaldehyde (1.07 g, 9.6 mM) and 2,5-dimethyl-2-phenyl-3(2H)-furanone (1.5 g, 8 mM) in ethanol (50 mL), was added 1N aqueous sodium hydroxide (1.6 mL, 1.6 mM). After the reaction solution was stirred at room temperature for one day, saturated aqueous sodium chloride (400 mL) was added. The aqueous layer was extracted with dichloromethane (3×100 mL). The combined dichloromethane extracts were washed with saturated aqueous sodium chloride (50 mL), dried over MgSO4, filtered and concentrated to give a yellow liquid. The liquid was purified by chromatography (silica gel, pet. ether-ethyl acetate) to afford a yellow solid (1.6 g, 71% yield), m.p. 75°-77° C.

Aufarbeitung

  1. extractionThe aqueous layer was extracted with dichloromethane (3×100 mL)
  2. washThe combined dichloromethane extracts were washed with saturated aqueous sodium chloride (50 mL)
  3. dry with materialdried over MgSO4
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customto give a yellow liquid
  7. customThe liquid was purified by chromatography (silica gel, pet. ether-ethyl acetate)

Quellen und Nachweise

ORD-Eintrag
ord-a78c709543a540b3a961308bb590019e
Quelldatensatz
uspto-grants-1991_03
Patentnummer
US05001126

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