Contraction of the six-membered alicyclic ring of perfluorinated ethyl- and diethyl-tetralins to five- and four-membered ones under the action of antimony pentafluoride
作者:Victor M. Karpov、Tatyana V. Mezhenkova、Vyacheslav E. Platonov
DOI:10.1016/0022-1139(95)03383-1
日期:1996.3
Interaction of perfluoro-1-ethyltetralin (2) with SbF5 leads to the formation of perfluorinated 5-ethyltetralin (5), 3-methyl-4-ethylindan (6) and 1,3,4-trimethylindan (4). Perfluoro-1,4-diethyltetralin (3) under the action of SbF5 gives perfluorinated 5,8-diethyltetralin (8), 1-methyl-4,7-diethylindan (9) and 1,1-dimethyl-3,6-diethylbenzocyclobutene (10).
perfluoro-1-ethylbenzocycloalkenes transformed further to disubstitutedderivatives. In the case of perfluorotetralin, the reaction gave perfluoro-1,4-diethyltetralin. Perfluorobenzocyclobutene gave perfluoro-1,1- and -1,2-diethylbenzocyclobutenes in about equal quantities, and perfluoroindan- practically only perfluoro-1,1-diethylindan. To explain this orientation, the electronic and steric effects are considered