Nitration triflatoboric acid

Nitration of Fluorinated Aromatics Using Triflatoboric Acid General Procedure 4... 

Nitration of strongly deactivated aromatic compounds such as 10 can be achieved with good yields of product by employing a mixture of nitric and triflatoboric acids.4 For example, pen-tafluorobenzene (10) is transformed into pentafluoronitrobenzene (11) in 99% yield.4... 

Nitration of strongly deactivated aromatics was carried out with nitric acid mixed with triflatoboric superacid.482 The method is characterized by high yields (penta-fluorobenzene, 99%, 1,2,3,5-tetrafluorobenzene, 89% 2,3,4-trifluoronitrobenzene, 96% methyl phenyl sulfone, 78%), usually high regioselectivity, and mild reaction conditions (room temperature), and it also tolerates many functional groups. 

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