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8329612 
Journal Article 
Practical Synthesis of (±)-α-Tocopherol. Trifluoromethanesulfonimide as an Extremely Active Brønsted Acid Catalyst for the Condensation of Trimethylhydroquinone with Isophytol 
Ishihara, K; Kubota, M; Yamamoto, H 
1996 
1 
Synlett
ISSN: 0936-5214
EISSN: 1437-2096 
Georg Thieme Verlag 
1996 
11 
1045-1046 
English 
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.