Preparation of vitamin E

Preparation of vitamin E

PCT No. PCT/EP93/00498 Sec. 371 Date Sep. 9, 1994 Sec. 102(e) Date Sep. 9, 1994 PCT Filed Mar. 5, 1993 PCT Pub. No. WO93/19057 PCT Pub. Date Sep. 30, 1993.A process for preparing dl- alpha -tocopherol or dl- alpha -tocopheryl acetate by acid-catalyzed reaction of 2,3,5-trimethylhydroquinone (TMH) wi...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: KIEFER, HANS, JAEDICKE, HAGEN, GRAFEN, PAUL
Format: Patent
Sprache:eng
Schlagworte:
APPARATUS THEREFOR
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
GENERAL METHODS OF ORGANIC CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:PCT No. PCT/EP93/00498 Sec. 371 Date Sep. 9, 1994 Sec. 102(e) Date Sep. 9, 1994 PCT Filed Mar. 5, 1993 PCT Pub. No. WO93/19057 PCT Pub. Date Sep. 30, 1993.A process for preparing dl- alpha -tocopherol or dl- alpha -tocopheryl acetate by acid-catalyzed reaction of 2,3,5-trimethylhydroquinone (TMH) with phytol or isophytol in a solvent at elevated temperature, with or without subsequent esterification of the resulting tocopherol with acetic anhydride, entails the reaction being carried out in the presence of a mixture of ortho-boric acid and certain aliphatic di- or tricarboxylic acids, preferably in the presence of a mixture of ortho-boric acid and oxalic acid.