Reaktion #1880955

Reaktionsgleichung

water

(2E,7Z)-1,1-dimethoxy-2,4,7-decatriene

→

(2E,7Z)-2,4,7-decatrienal

Ausbeute 96.0%

Lösungsmittel

acetone

Et2O

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.ADDITIONwere added 0.2 g of AMBERLITE®
2. 2
   Sonstigethe reaction mixture so obtained
3. 3
   FiltrationAfterwards, the reaction mixture was filtered
4. 4
   Einengenconcentrated
5. 5
   SonstigeThe crude product thus obtained
6. 6
   Waschenthe organic phase has been washed twice with brine
7. 7
   Trocknendried over Na2SO4
8. 8
   Einengenconcentrated
9. 9
   Sonstigeto yield 8.8 g of an extract
10. 10
    workup.DISTILLATIONThe extract has been further purified by distillation over a Vigreux column (52–54° C./0.1 mbar)

Vorschrift

To a solution of 9.8 g of a mixture of (2E,7Z)-1,1-dimethoxy-2,4,7-decatriene as obtained in example 1 (50 mmoles) and 2.7 ml of water (150 mmoles) in 150 ml of acetone were added 0.2 g of AMBERLITE®, and the reaction mixture so obtained was stirred for 1 hour at room temperature. Afterwards, the reaction mixture was filtered and neutralized with 1 ml of a saturated aqueous solution of NaHCO3, and then concentrated. The crude product thus obtained was dissolved in Et2O and the organic phase has been washed twice with brine, dried over Na2SO4 and concentrated to yield 8.8 g of an extract. The extract has been further purified by distillation over a Vigreux column (52–54° C./0.1 mbar) to yield 7.2 g of a mixture of (2E,7Z)-2,4,7-decatrienal (4Z:4E=88:8)(purity=96%, yield=96%). The product thus obtained had the same spectroscopic data as described in WO 01/58282.

Quelle