Preparation of 3,4-Fused Cyclopropabenzenes and Cyclopropabenzenyl Cations

Article abstract of DOI:10.1002/hlca.19860690704

A series of 3,4-disubstituted (4a,b) or 3,4-fused (4c-e) 1,1-di-fluorocyclopropabenzenes, including the very strained 1,1-difluoro-3,4-dihydro-1H-cyclobutacyclopropabenzene (4e) have been synthesized and characterized.Dissolution of these difluoro derivatives in fluorosulfonic acid affords the fluoro cations 3a-e. 1H-, 19F-, and 13C-NMR data of the cations are reported and discussed with respect to those of the precursors.