A mild synthetic route to α-nitroso diaryl pyrroles.

A new synthetic method to access α-nitroso pyrroles is presented. This method utilises the nitrosonium salt NOBF, enabling short reaction times (<10 minutes) and avoiding the harsh acidic conditions usually associated with pyrrole nitrosation. Application of this procedure to diarylated pyrroles yielded several novel nitroso-pyrroles.