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■ Synthesis of Trifluoromethylated Tetrahydropyrans from Ene Reaction Products of Trifluoromethyl Ketones: Synthesis of Fluorine Analogs of a Sesquiterpene

Takabumi Nagai, Hiroshi Ohtsuka, Mayumi Koyama, Akira Ando, Takuichi Miki, and Itsumaro Kumadaki*

*Faculty of Pharmaceutical Sciences, Setsunan University, 45-1, Nagaotoge-cho, Hirakata-shi, Osaka 573-0101, Japan

Abstract

As the extension of the ene reaction of trifluoromethyl ketones, α-trifluoromethylated tetrahydropyrans, including fluorine analogs of sesquiterpenes, were synthesized from trifluoromethylated homoallyl alcohols, the products of the ene reaction.