Chrysanthemic acid, cis-(-)- → Chrysanthemic Acid

HRID 1198856

Reaktionsgleichung

Reaktionsgleichung von HRID 1198856
[CH3:1][C:2]([CH3:12])=[CH:3][C@H:4]1[C:6]([CH3:8])([CH3:7])[C@H:5]1[C:9]([OH:11])=[O:10].Br.C(O)(=O)C>C1(C)C=CC=CC=1>[CH3:1][C:2]([CH3:12])=[CH:3][CH:4]1[C:6]([CH3:7])([CH3:8])[CH:5]1[C:9]([OH:11])=[O:10]

Komponenten

4

Edukt 2

HCID 20755Chrysanthemic acid, cis-(-)-HCID 21893785Acetic Acid Mixture with Hydrobromic Acid

Produkt 1

HCID 2743Chrysanthemic AcidAusbeute 96 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 1140TolueneLösungsmittel

Versuchsvorschrift

To a solution of cis chrysanthemic acid (10 g) in toluene (53 ml) was added a solution of 25% hydrogen bromide-acetic acid (1.3 g) at room temperature under a nitrogen atmosphere. Irradiation with a high pressure mercury lamp (110 W) was made for 30 minutes under stirring. After the irradiation was over, similar after-treatment as in Example 1 was applied to obtain chrysanthemic acid (9.6 g). Gas chromatography assay of the product gave the isomer ratio: cis, 8.6%; and trans, 91.4%.

Aufarbeitung

  1. customIrradiation with a high pressure mercury lamp (110 W)
  2. customAfter the irradiation

Quellen und Nachweise

ORD-Eintrag
ord-145d00c689a04f1f8cfdc0010283fec0
Quelldatensatz
uspto-grants-1990_02
Patentnummer
US04898655

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