A convenient synthesis of N,N-bis(trifluoromethyl)anilines

A convenient synthesis of N,N-bis(trifluoromethyl)anilines by means of dediazotation reactions of previously unknown aryldiazoniumbis(trifluoromethyl)imides in the presence of CuI salts are described. Properties and applications of N,N-bis(trifluoromethyl)anilines in syntheses of aromatic compounds containing the (CF3)2N group are presented.

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► [ArN2][N(CF3)2] are convenient reagents for introduction of N(CF3)2 group.
► Decomposition of [ArN2][N(CF3)2] in the presence of CuI[WCA]·4 CH3CN salts.
► Properties and applications of Ar-N(CF3)2.
► 4-BrC6H4N(CF3)2 offers a variety of possibilities for further derivatisation.
► Various new (CF3)2N-aromatic compounds.