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Synlett 1996; 1996(11): 1045-1046
DOI: 10.1055/s-1996-5672
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Practical Synthesis of (±)-α-Tocopherol. Trifluoromethanesulfonimide as an Extremely Active Brønsted Acid Catalyst for the Condensation of Trimethylhydroquinone with Isophytol

Kazuaki Ishihara, Manabu Kubota, Hisashi Yamamoto*
  • *Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa, Nagoya 464-01, Japan, Fax: 81-52-789-3222
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Publication Date:
31 December 2000 (online)

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Trifluoromethanesulfonimide (triflimide) is an extremely active Brønsted acid catalyst for the condensation of trimethylhydroquinone with isophytol; the reaction in hexane proceeds smoothly in the presence of 1 mol% of triflimide under reflux.

α-tocopherol - trifluoromethanesulfonimide - Brønsted acid