PREPARATION OF TOCOPHERYL ACETATE AND TOCOPHERYL PROPIONATE

摘要

PREPARATION OF TOCOPHERYL ACETATE AND TOCOPHERYL PROPIONATE Tocopheryl acetate or tocopheryl propionate is prepared by a process in which trimethylhydroquinone is reacted with phytol or isophytol in the presence of a proton donor and zinc chloride and of a liquid hydrocarbon as the solvent, the tocopherol obtained is then esterified, and the esterification mixture is worked up in a conventional manner to give tocopheryl acetate or tocopheryl propionate, wherein the mixture obtained in the reaction of trimethylhydroquinone with phytol or isophytol is cooled to room temperature, acetic anhydride or propionic anhydride is added and the resulting mixture is heated to 20-60.degree.C or allowed to warm up to this temperature.