Process for manufacturing (all-rac)-.alpha.-tocopherol

Details Process for manufacturing (all-rac)-.alpha.-tocopherol Process for manufacturing (all-rac)-.alpha.-tocopherol

C - Chemistry, Metallurgy

07

D

C07D 311/72 (2006.01)

Patent

CA 2354997

A process for the manufacture of (all-rac)-.alpha.-tocopherol by the catalyzed reaction of trimethylhydroquinone with isophytol or phytol is characterized by carrying out the reaction in the presence of a bis(perfluorinated hydrocarbyl sulphonyl)imide or a metal salt thereof as the catalyst in an organic solvent. In addition to said metal salt a Bronsted acid, e.g. sulphuric acid, phosphoric acid or p-toluenesulphonic acid, may be used as a co- catalyst. The product of the process is the most active member of the vitamin E group.

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