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New Approach to the Synthesis of (2RS,4"R,8"R)-α-Tocopherol (Vitamin E)

New Approach to the Synthesis of (2RS,4"R,8"R)-α-Tocopherol (Vitamin E) Doklady Chemistry, Vol. 380, Nos. 1–3, 2001, pp. 255–257. Translated from Doklady Akademii Nauk, Vol. 380, No. 2, 2001, pp. 201–203. Original Russian Text Copyright © 2001 by Odinokov, Mallyabaeva, Spivak, Emel’yanova, Dzhemilev. CHEMISTRY New Approach to the Synthesis of (2RS,4'R,8'R)-a-Tocopherol (Vitamin E) V. N. Odinokov, M. I. Mallyabaeva, A. Yu. Spivak, G. A. Emel’yanova, and Corresponding Member of the RAS U. M. Dzhemilev Received June 7, 2001 Vitamin E, the most important fat-soluble antioxidant tenoids and xanthophylls). Under the ozonolysis condi- [1] occurring in edible vegetable oils, is a mixture of vita- tions found, the dihydroporphyrin ring of chlorophyll I min E-active components in different ratios, (R,R,R)-a - remained intact, which was confirmed by the presence of tocopherol being the major component [2]. Synthetic an absorption maximum in the region of l 640–665 nm. completely racemic (2RS,4'RS,8'RS)-a -tocopherol is An increase in the ozone proportion above 9 mol equiv did obtained by acid-catalyzed condensation of all-rac-iso- not increase the yield of phyton II. The resulting phyton II phytol with trimethylhydroquinone (TMHQ) [3]. The syn- was reacted with vinyl magnesium bromide to produce theses of (2R,4'R,8'R)-a -tocopherol are complicated and (3RS,7R,11R)-isophytol III, whose condensation with multistep [2, 4]. On http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Doklady Chemistry Springer Journals

New Approach to the Synthesis of (2RS,4"R,8"R)-α-Tocopherol (Vitamin E)

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References (4)

Publisher
Springer Journals
Copyright
Copyright © 2001 by MAIK “Nauka/Interperiodica”
Subject
Chemistry; Chemistry/Food Science, general; Industrial Chemistry/Chemical Engineering
ISSN
0012-5008
eISSN
1608-3113
DOI
10.1023/A:1011998504137
Publisher site
See Article on Publisher Site

Abstract

Doklady Chemistry, Vol. 380, Nos. 1–3, 2001, pp. 255–257. Translated from Doklady Akademii Nauk, Vol. 380, No. 2, 2001, pp. 201–203. Original Russian Text Copyright © 2001 by Odinokov, Mallyabaeva, Spivak, Emel’yanova, Dzhemilev. CHEMISTRY New Approach to the Synthesis of (2RS,4'R,8'R)-a-Tocopherol (Vitamin E) V. N. Odinokov, M. I. Mallyabaeva, A. Yu. Spivak, G. A. Emel’yanova, and Corresponding Member of the RAS U. M. Dzhemilev Received June 7, 2001 Vitamin E, the most important fat-soluble antioxidant tenoids and xanthophylls). Under the ozonolysis condi- [1] occurring in edible vegetable oils, is a mixture of vita- tions found, the dihydroporphyrin ring of chlorophyll I min E-active components in different ratios, (R,R,R)-a - remained intact, which was confirmed by the presence of tocopherol being the major component [2]. Synthetic an absorption maximum in the region of l 640–665 nm. completely racemic (2RS,4'RS,8'RS)-a -tocopherol is An increase in the ozone proportion above 9 mol equiv did obtained by acid-catalyzed condensation of all-rac-iso- not increase the yield of phyton II. The resulting phyton II phytol with trimethylhydroquinone (TMHQ) [3]. The syn- was reacted with vinyl magnesium bromide to produce theses of (2R,4'R,8'R)-a -tocopherol are complicated and (3RS,7R,11R)-isophytol III, whose condensation with multistep [2, 4]. On

Journal

Doklady Chemistry – Springer Journals

Published: Oct 12, 2004

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