... 1985 The Chemical Society of Japan FRIEDEL-CRAFTS REACTION OF 3, 6-DIHYDRO-4-METHYL- 2H-PYRAN WITH PHENOLS. A CONVENIENT SYNTHESIS OF A KEY INTERMEDIATE OF ALPHA-TOCOPHEROL Yoshiji FUJITA,* Manzo SHIONO, Katsushi EJIRI, and Kazumi SAITA+ Central Research Laboratories, Kuraray Co. Ltd., ... Page 2. 1400 Chemistry Letters, 1985 trifluoride etherate, instead of aluminum chloride, afforded 2 in 5, 30, and 81% ...