Water → 1-Ethynylcyclohexene

HRID 371962

Reaktionsgleichung

Reaktionsgleichung von HRID 371962
[C:1]([C:3]1[CH2:8][CH2:7][CH2:6][CH2:5][CH:4]=1)#[CH:2].[H-].[Na+].[CH3:11][CH:12]1[CH:17]([CH3:18])[CH2:16][CH2:15][CH:14]([CH3:19])[C:13]1=[O:20].O>O1CCCC1.CCOCC>[C:1]([C:3]1[CH2:8][CH2:7][CH2:6][CH2:5][CH:4]=1)#[CH:2].[CH3:11][CH:12]1[CH:17]([CH3:18])[CH2:16][CH2:15][CH:14]([CH3:19])[C:13]1([C:2]#[C:1][C:3]1[CH2:8][CH2:7][CH2:6][CH2:5][CH:4]=1)[OH:20]

Komponenten

8

Edukt 4

HCID 962WaterHCID 24758Sodium hydrideHCID 791281-EthynylcyclohexeneHCID 1425832,3,6-Trimethylcyclohexan-1-one

Produkt 2

HCID 791281-EthynylcyclohexeneHCID 203524611-(2,3,6-Trimethyl-1-hydroxy-cyclohexyl)-2-(cyclohex-1-en-1-yl)-acetylene

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 3283Diethyl EtherLösungsmittelHCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

21.5 g of ethynylcyclohexene are added dropwise to a suspension of 6 g of 80% strength sodium hydride in 200 ml of tetrahydrofuran under reflux, and the reaction mixture is kept under reflux conditions until no further gas is evolved. 28 g of 2,3,6-trimethyl-cyclohexanone are then added dropwise at room temperature and the mixture is left overnight, whilst being stirred, in order to complete the reaction. Water is added to the reaction mixture, the reaction product is taken up in ether and the ether solution is washed with water, dried and concentrated. Fractional distillation gives 9 g of unconverted ethynylcyclohexene, 8 g of starting ketone, and 22 g of 1-(2,3,6-trimethyl-1-hydroxy-cyclohexyl)-2-(cyclohex-1-en-1-yl)-acetylene of boiling point 120° C/0.1 mm Hg and refractive index nD25 = 1.5143. This corresponds to a yield of 68% of theory, based on trimethylcyclohexanone converted. Fragrance note: faint, tart, herbaceous.

Aufarbeitung

  1. temperatureunder reflux
  2. customthe reaction
  3. washthe ether solution is washed with water
  4. customdried
  5. concentrationconcentrated
  6. distillationFractional distillation

Quellen und Nachweise

ORD-Eintrag
ord-c49b3e6afff64eb6bb4958e2c9f6e8a1
Quelldatensatz
uspto-grants-1978_05
Patentnummer
US04088681

Verknüpfte Notizen

Wird geladen…