Preparation of alpha-tocopherol and alpha-tocopheryl acetate in

Details Preparation of alpha-tocopherol and alpha-tocopheryl acetate in Preparation of alpha-tocopherol and alpha-tocopheryl acetate in

1995-05-12

1996-06-04

Chan, Nicky

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D31172

Patent

active

055234208

ABSTRACT:
A process for preparing .alpha.-tocopherol or tocopheryl acetate by cyclocondensation of trimethylhydroquinone with phytol or isophytol in the presence of an acid catalyst and of a solvent and, where appropriate, subsequent acetylation, which comprises carrying out the cyclocondensation and, where appropriate, the subsequent acetylation in liquid or supercritical carbon dioxide as solvent.

REFERENCES:
patent: 3444213 (1969-05-01), Nelan
patent: 4217285 (1980-08-01), Yoshino et al.
Separation of Tocopherols from Deordorizers . . . , Brunner et al., The Journal of Supercritical Fluids, 1991, 4, 72-80.
Diploma theses of Martin Unterhuber, Univ. Erlangen-Nurnberg, Apr. 1986.

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