Bipyridine Periodic Mesoporous Organosilica: A Solid Ligand for the Iridium‐Catalyzed Borylation of CH Bonds

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<jats:title>Abstract</jats:title><jats:p>With the goal to obtain a molecularly defined iridium(I) heterogeneous CH functionalization catalyst, a <jats:italic>periodic mesoporous organosilica</jats:italic> (PMO) containing bipyridylene moieties in a matrix of biphenylene units as ligand platform was designed and fully characterized. The material exhibits a high surface area with small mesopores in a vermicular arrangement, and the pore walls show a highly crystal‐like character. After surface passivation with chlorotrimethylsilane and functionalization with chloro(1,5‐cyclooctadiene)iridium(I) dimer [{IrCl(COD)}<jats:sub>2</jats:sub>] a molecularly defined Ir(I) surface complex was obtained according to EXAFS and UV‐Vis spectroscopy. This functionalized material catalyzes the direct CH borylation of arenes to yield the corresponding boronic esters and can be reused without significant loss of activity.</jats:p><jats:p><jats:boxed-text content-type="graphic" position="anchor"><jats:graphic xmlns:xlink="http://www.w3.org/1999/xlink" mimetype="image/gif" position="anchor" specific-use="enlarged-web-image" xlink:href="graphic/mcontent.gif"><jats:alt-text>magnified image</jats:alt-text></jats:graphic></jats:boxed-text></jats:p>

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