Hydroboration of Alkynes Catalyzed by Pyrrolide-Based PNP Pincer–Iron Complexes

To
utilize iron complexes as catalysts, the application of a well-designed
ligand is critical to control the reactivity of the iron center. Recently,
our group has succeeded in the synthesis of iron complexes bearing
a pyrrolide-based PNP pincer ligand and their application to the catalytic
transformation of dinitrogen into ammonia under mild reaction conditions.
As an extensive study, we report the iron-catalyzed hydroboration
of alkynes with pinacolborane, where the corresponding E-isomers are obtained selectively.