Iridium complexes generated from Ir(I) precursors and PIB oligomer functionalized bpy ligands efficiently catalyzed the reactions of arenes with bis(pinacolato)diboron under mild conditions to produce a variety of arylboronate compounds. The activity of this PIB bound homogeneous catalyst is similar to that of an original non-recyclable catalyst which allows it to be used under milder conditions than other reported recyclable catalysts. This oligomer-supported Ir catalyst was successfully recovered through biphasic extraction and reused for eight cycles without a loss of activity. Biphasic separation after the initial use of the catalyst led to an insignificant amount of iridium leaching from the catalyst to the product, and no iridium leaching from the catalyst was observed in the subsequent recycling runs. Arylboronate products obtained after extraction are sufficiently pure as observed by ¹H and ¹³C-NMR spectroscopy that they do not require further purification.

中文翻译：

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高活性，可分离和可回收的联吡啶铱催化剂，用于CH硼化反应

铱络合物选自Ir（生成我）前体和PIB低聚物官能化的bpy配体在温和的条件下有效催化了芳烃与双（频哪醇）二硼的反应，生成了多种芳基硼酸酯化合物。这种与PIB结合的均相催化剂的活性类似于原始的不可回收催化剂，与其他已报道的可回收催化剂相比，它可以在较温和的条件下使用。这种低聚物负载的Ir催化剂可通过双相萃取成功回收，并在不损失活性的情况下重复使用八个循环。最初使用催化剂后的两相分离导致从催化剂到产物的铱浸出量微不足道，并且在随后的循环运行中未观察到从催化剂浸出的铱。¹ H和¹³ C-NMR光谱表明它们不需要进一步纯化。