fluorine acceptor which defluorinates perfluoroalkanes with the partial structure (Rf)2CFCF(Rf)2 to alkenes and perfluoroalkenes to dienes. Carbon catalyzes double-bond shifts, as well as cis/trans and ring-chain perfluoro-olefin isomerizations. Carbon effectively catalyzes TFE and HFP dimerizations. Less effectively, carbon catalyzes further oligomerization of TFE to give low yields of linear, internal olefins
Opening of the four-membered ring in perfluorinated 1-alkyl-2-phenyl- and 1-aryl-1,2-dihydrocyclobutabenzenes in the system I2-SbF5
作者:T. V. Mezhenkova、V. M. Karpov、V. E. Platonov
DOI:10.1134/s1070428011070104
日期:2011.7
mixture, resulted in the formation of perfluorinated 2-methyl-, 2-ethyl-2′-methyl-, 4-ethyl-2′-methyl-, 2-ethyl-, and 2-propylbenzophenones via opening of the four-membered ring in the initial cyclobutabenzene at the C1–C2 bond. The presence of hydrogenfluoride facilitates the process and promotes profound transformations leading to anthracene derivatives.
Perfluoro-1-phenylindan (1) was obtained from perfluoroindan and pentafluorobenzene in the presence of SbF5. Compound 1 heated with antimonypentafluoride at 170°C and then treated with water gave a mixture of perfluorinated 9-methylfluorene (5), 9-hydroxy-9-methylfluorene (6), 9-methyl-1,2,3,4,5,6,7,8-octahydroanthracene (7), 1,9-dimethyl-5,6,7,8-tetrahydro-β-naphthindan (8). When heated with SbF5