Switchable 2,2,2‐Trifluoroethylation and gem‐Difluorovinylation of Organoboronic Acids with 2,2,2‐Trifluorodiazoethane

The transition‐metal‐free 2,2,2‐trifluoroethylation and gem‐difluorovinylation of arylboronic acids were developed. By employing different reaction conditions, these transformations provide both (2,2,2‐trifluoroethyl)arenes and gem‐difluorovinylarenes from arylboronic acids and 2,2,2‐trifluorodiazoethane. The operation is simple and scalable with good functional group tolerance.