Enhancement of Neighbouring-Group Participation in Cu<sup>0</sup>-Promoted Cross-Coupling<i>gem</i>-Difluoromethylenation of Aryl/Alkenyl Halides with 1,3-Azolic Difluoromethyl Bromides
3‐azolic (oxa‐, thia‐ or aza‐) difluoromethyl bromides or 2‐bromodifluoromethyl‐1,3‐oxazoline has been developed for the construction of pharmaceutically important gem‐difluoromethylene‐linked twin molecules. The unique π‐conjugated aryl‐fused 1,3‐azolic moiety in difluoromethyl bromide substrates could stabilise the reaction intermediates, which promotes the reactivities, providing facile access to the
2‐Fluoromethylated quinolines were synthesized through the reaction of N‐aryl‐fluorinatedimidoyliodides with terminal alkynes in good yields by the catalysis of copper(I) iodide (CuI) alone.