Abstract
An unusual ‘dimerization’ of CF3-allyl alcohols [ArCHCHCH(OH)CF3] under the action of anhydrous FeCl3 was found to give fluorinated indanes in 62–90% yields via the formation of intermediate allyl cations. Reactions of CF3-allyl alcohols with arenes (Ar′H) led to CF3-alkenes [Ar(Ar′)CHCHCHCF3] in 48–75% yields. The mechanisms of the transformations are discussed.
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