PROCESS FOR THE PREPARATION OF 2 5-DIALKYL-4-HYDROXY-(2H)-FURAN-3-ONES

1300360 Production of dialkyl hydroxyfuran- 3-ones INTERNATIONAL FLAVORS & FRAGRANCES Inc 19 April 1971 [10 Feb 1970] 21454/71 Heading C2C 2,5 - Dialkyl - 4 - hydroxy - 2[3H] - dihydrofuran-3-ones are obtained by reacting a dihalodiketone of the formula wherein X is halogen and R is alkyl, with...

Ausführliche Beschreibung

Gespeichert in:

Bibliographische Detailangaben
1. Verfasser:	WILLIAM J. EVERS
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES CANDLES CHEMISTRY DETERGENTS ESSENTIAL OILS FATTY ACIDS THEREFROM FOODS OR FOODSTUFFS FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BYSUBCLASSES A23B - A23J HETEROCYCLIC COMPOUNDS HUMAN NECESSITIES METALLURGY ORGANIC CHEMISTRY PERFUMES PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL PRODUCING (PRESSING, EXTRACTION), REFINING AND PRESERVINGFATS, FATTY SUBSTANCES (e.g. LANOLIN), FATTY OILS AND WAXES,INCLUDING EXTRACTION FROM WASTE MATERIALS THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OFNUTRITIVE QUALITIES, PHYSICAL TREATMENT THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
Online-Zugang:	Volltext bestellen
Tags:	Tag hinzufügen Keine Tags, Fügen Sie den ersten Tag hinzu!

Beschreibung
Zusammenfassung:	1300360 Production of dialkyl hydroxyfuran- 3-ones INTERNATIONAL FLAVORS & FRAGRANCES Inc 19 April 1971 [10 Feb 1970] 21454/71 Heading C2C 2,5 - Dialkyl - 4 - hydroxy - 2[3H] - dihydrofuran-3-ones are obtained by reacting a dihalodiketone of the formula wherein X is halogen and R is alkyl, with an aqueous alkali or alkaline earth metal hydroxide at 75-125C. The reaction is suitably effected by refluxing an aqueous mixture of the dihalodiketone and the hydroxide under an inert atmosphere at a pressure of 1-2 atmos. The dihalodiketone starting materials may be prepared by reacting a dialkanoyl with a halogen in the presence of a hydrogen halide, preferably at a temperature of 30-80C.