| abstract |
Fluoro-substituted carbocyclic compounds are prepared by (A) reacting hydrogen fluoride with a chloro-cyclohexenyl compound of the formula <IMAGE> where R1 and R2 are independently selected from the group consisting of -H, -CH2OH, -COF, -COCl, -CF3, -CN, <IMAGE> and -CH2R, where R is -H or alkyl of 1-4 carbon atoms, to form a gem-dihalocyclohexane compound of the formula <IMAGE> where X is chlorine and R1 and R2 are as defined above, (B) dehydrohalogenating the gem-dihalocyclohexane compound in the vapor phase to form a fluoro-cyclohexenyl compound of the formula <IMAGE> (C) contacting the fluoro-cyclohexenyl compound, in the vapor phase, with a dehydrogenation catalyst to form a fluoro-substituted aromatic compound of the formula <IMAGE> |