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Scientific article
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Rearrangements Involving C₈H₈F-Cations of the Cage Type

Published inHelvetica chimica acta, vol. 65, no. 8, p. 2476-2480
Publication date1982
Abstract

The homo-l, 4 adduct obtained from difluorocarbene and bicyclo [2.2.1]hepta-2, 5-diene (1) was treated successively with HCl, FSO3H and SbF5 in SO2ClF at low temperature. The protic acids underwent electrophilic addition to the cyclopropane part of 1, giving the corresponding derivatives. However, in FSO3H at - 50°, protonation of the gem-difluoro grouping also occurred to give the 2-fluoro-6-fluorosulfonylbicyclo [3.2.1]oct-2-en-3-yl cation. The reaction of 1 with SbF5 at -78° led initially to the formation of the 2-fluorobicyclo [3.2.1 ]octa-2, 6-dien-4-yl cation, which rearranged to 4-fluorotricyclo [5.1.0.05,8]oct-3-en-2-yl cation at -40°. These rearrangements are discussed in the light of those expected for C8H8F square pyramidal cations.

Citation (ISO format)
JEFFORD, Charles et al. Rearrangements Involving C₈H₈F-Cations of the Cage Type. In: Helvetica chimica acta, 1982, vol. 65, n° 8, p. 2476–2480. doi: 10.1002/hlca.19820650816
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ISSN of the journal0018-019X
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