8-hexafluorobicyclo[2,2,2]octa-2,5-dienes together with poly-addition products. Some of the Diels–Alder adducts of (10) may be more conveniently prepared by reaction of the analogous adducts of (14) with lithium aluminium hydride; however, where trifluoromethyl occurs as a vinylic substituent the products of this reaction are polyfluoro-5-methylenebicyclo[2,2,2]oct-2-enes. Pyrolysis of alkyne adducts
2小时,3小时-六
氟环己-1,3-二烯(10),六
氟-2,3-二甲基环己-1,3-二烯(7)和
全氟环-1,3-二烯(14)通过1,4-加成与
乙烯反应得到高产率的2,3-二取代的1,4,5,5,6,6-六
氟双环[2,2,2]辛-2-烯(3),(6)和(5)。二烯(10)和(14)与
丙二烯反应,得到多
氟-5-亚甲基双环[2,2,2]辛-2-烯(9)和(15)。二烯(10)与
炔烃反应,得到2,3-二取代的1,4,7,7,8,8,8-六
氟双环[2,2,2]八-2,5-二烯以及聚加成产物。某些(10)的Diels-Alder加合物可以通过(14)的类似加合物与
氢化铝锂反应而更方便地制得;然而,当三
氟甲基作为
乙烯基取代基出现时,该反应的产物是多
氟-5-亚甲基双环[2,2,2]辛-2-烯。