Anhydrous hydrogen fluoride serves as an excellent agent for introducing fluorine into organic compounds, as a solvent and a catalyst with Friedel-Crafts activity.A number of chlorine/fluorine exchange reactions which occur in HF are described, some of which have involved surprising rearrangement processes.New reactions, in which the catalytic action of hydrogen fluoride are utilized, are also discussed.
Baasner, B.,Klauke, E.
p. 553 - 564
(2007/10/02)
Method for preparing trichloromethyl-trifluoromethyl-benzenes
A process for the preparation of a trichloromethyl-trifluoromethyl-benzene of the formula STR1 wherein R1 and R2 are identical or different and represent hydrogen, fluorine or chlorine, By contacting at least one molecule of the formula STR2 wherein R1 and R2 are as previously identified, m and n are independently 0 to 3 With another molecule of the formula STR3 wherein M AND N ARE INDEPENDENTLY 0 TO 3 In the presence of a halogen transfer catalyst, optionally in the presence of a promoter.
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(2008/06/13)
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