Ozone → (+/-)-cis-6-(2-Oxoethyl)-2,2-dimethyl-1,3-dioxane-4-acetonitrile

HRID 1198341

Reaktionsgleichung

Reaktionsgleichung von HRID 1198341
[CH3:1][C:2]1([CH3:14])[O:7][C@@H:6]([CH2:8][C:9]#[N:10])[CH2:5][C@@H:4]([CH2:11][CH:12]=C)[O:3]1.[O:15]=[O+][O-]>ClCCl>[O:15]=[CH:12][CH2:11][C@H:4]1[O:3][C:2]([CH3:14])([CH3:1])[O:7][C@@H:6]([CH2:8][C:9]#[N:10])[CH2:5]1

Komponenten

4

Edukt 2

HCID 24823Ozone2×HCID 15045109(+/-)-cis-2,2-Dimethyl-6-(2-propenyl)-1,3-dioxane-4-acetonitrile

Produkt 1

HCID 86744690(+/-)-cis-6-(2-Oxoethyl)-2,2-dimethyl-1,3-dioxane-4-acetonitrile

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6344DichloromethaneLösungsmittel

Versuchsvorschrift

A solution of (±)-cis-2,2-dimethyl-6-(2-propenyl)-1,3-dioxane-4-acetonitrile, 3 g (15.36 mmol), in 100 mL of dichloromethane is cooled to -78° C. under nitrogen. Ozone (Welsbach generator, flow rate 0.1, voltage=90 V) is then passed through a fritted gas inlet tube into the solution until the blue color of ozone appears. The current is turned off, and oxygen bubbled through until the blue color is discharged. Triphenylphosphine, 4.2 g (16 mmol), is added and the colorless solution allowed to warm to room temperature. Flash chromatography provides, after concentration in vacuo, 2.5 g of pure (±)-cis-6-(2-oxoethyl)-2,2-dimethyl-1,3-dioxane-4-acetonitrile.

Aufarbeitung

  1. customoxygen bubbled through until the blue color
  2. additionTriphenylphosphine, 4.2 g (16 mmol), is added
  3. customFlash chromatography provides
  4. concentrationafter concentration in vacuo, 2.5 g of pure (±)-cis-6-(2-oxoethyl)-2,2-dimethyl-1,3-dioxane-4-acetonitrile

Quellen und Nachweise

ORD-Eintrag
ord-890fbf492ec34144ac02a52eda2d9769
Quelldatensatz
uspto-grants-1994_01
Patentnummer
US05280126

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