Ortho directed C-H borylation of aromatic compounds that contain different directing groups can be achieved using heterogeneous and homogeneous catalysts. In iridium-catalyzed systems, 14-electron intermediates likely mediate these processes. We have shown that low-coordinate Ir precatalysts can be obtained by using donor ligands that incorporate pendant silanes. These species are active for directed C�H borylations with a range of substrates. We will discuss mechanisms by which these catalysts operate, present structures that pertain to catalysis, and discuss substrate scope in the context of other methodologies.

Directed C�H borylation with N and P donor ligands bearing pendant silanes

248th National Meeting (2014)

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