An Efficient Synthesis of Bis-1,3-(3′-aryl‑<i>N</i>‑heterocycl-1′-yl)arenes as CCC-NHC Pincer
Ligand Precursors
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Abstract
A report that demonstrated
an efficient methodology for the arylation
of imidazoles has been extended to bis(<i>N</i>-heterocyclic)
compounds. Using bis(aryl) iodonium salts provides high-yielding access
to CCC-NHC ligand precursors in a single step. Examples of arylation
using various iodonium salts are reported herein with an investigation
into the factors governing their relative rate of reactivity. The
metalation of one of these compounds using Zr(NMe<sub>2</sub>)<sub>4</sub> and its subsequent treatment with [Pt(COD)Cl<sub>2</sub>]
to yield a transmetalated product are reported