Abstract
Terminal F-olefins (F designates perfluorinated molecules) react with boron triflate (1) to form corresponding allyl triflates RfCFCFCF2OSO2CF3 in moderate yield. The reaction of F-pentene-2 is much slower, resulting in insertion of CF3SO2O into the CF3 group of fluorolefin. Mono- and dihydrofluorolefins were found to be more reactive toward 1. Both F-cylobutene and F-cyclopentene were converted into corresponding cyclic allyl triflates by reaction with 1, but F-cyclohexene was found to be resistant to the action of boron triflate. In contrast to terminal fluorolefins, both 5H,6H-F-n-decene-5 and 1H,1H-F-isobutene react with 1 without rearrangement, producing corresponding allyl triflates in 47 and 63% yields, respectively.
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