Procédé de préparation de l'a-sinensal

The present invention relates to a novel process for preparing unsaturated aldehydes comprising four double bonds of formula WHEREIN ONE OF THE DOUBLE BONDS IS REPRESENTED BY THE DOTTED LINES. Aldehyde Ia (called alpha -sinensal) corresponds to the above formula wherein the double bond represented b...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	HERMANN,BUECHI,GEORGE, OHLOFF,GUENTHER,DR, STRICKLER,HUGO,DR, WUEST,HANS
Format:	Patent
Sprache:	fre
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES CANDLES CHEMISTRY DETERGENTS ESSENTIAL OILS FATTY ACIDS THEREFROM HETEROCYCLIC COMPOUNDS METALLURGY ORGANIC CHEMISTRY PERFUMES PRODUCING (PRESSING, EXTRACTION), REFINING AND PRESERVINGFATS, FATTY SUBSTANCES (e.g. LANOLIN), FATTY OILS AND WAXES,INCLUDING EXTRACTION FROM WASTE MATERIALS
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Beschreibung
Zusammenfassung:	The present invention relates to a novel process for preparing unsaturated aldehydes comprising four double bonds of formula WHEREIN ONE OF THE DOUBLE BONDS IS REPRESENTED BY THE DOTTED LINES. Aldehyde Ia (called alpha -sinensal) corresponds to the above formula wherein the double bond represented by the dotted lines is in the main carbon chain. Aldehyde Ib (called beta -sinensal) corresponds to the above formula wherein the double bond represented by the dotted lines is in the side chain. The invention also relates to new intermediates used in the said new process and to methods for preparing them. The said intermediates have also valuable organoleptic properties and are useful as fragrances in the preparation of perfumes, perfumed products and artificial essential oils.