Mechanochemical Transformation of CF3 Group: Synthesis of Amides and Schiff Bases

We communicate two mild, solvent-free mechanochemical coupling transformations of CF3 group with nitro compounds into amides or Schiff bases employing Ytterbia as a catalyst. This process proceeds via C-F bond activation, accompanied with utilisation of Si-based reductants/oxygen scavengers - reductants of the nitro group. The scope and limitations of the disclosed methodologies are thoroughly studied. To the best of our knowledge, this work is the first example of mechanical energy promoted transformation of the inert CF3 group into other functionalities.

Automated summary

In this study, two mild, solvent-free mechanochemical coupling transformations of CF3 group with nitro compounds were successfully demonstrated, leading to amides or Schiff bases. Ytterbia was used as a catalyst to facilitate the process, which involves C-F bond activation and the use of Si-based reductants/oxygen scavengers. This work represents the first example of utilizing mechanical energy to promote the transformation of the inert CF3 group into other functionalities.