Catalytic phenylborylation reaction by iridium(0) nanoparticles produced from hydridoiridium carborane
Catalytic phenylborylation reaction by iridium(0) nanoparticles produced from hydridoiridium carborane
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DOI：
10.1021/ic8000152
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发表时间：
2008-07-07
影响因子：
4.6
通讯作者：
Maguire, John A.
中科院分区：
文献类型：
--
作者：
Zhu Yinghuai;Chenyan, Koh;Maguire, John A.
以离子液体[THTdP][MS]为稳定剂，通过还原铱碳硼烷前体（Ph 3 P）（2）Ir（H）-（7，8-nido-C2B 9 H11），成功制备了分散性良好的铱（0）纳米粒子。发现铱纳米颗粒是芳基硼基化形成硼酸的活性催化剂。催化剂的活性已被调查作为一个功能的活化碱，和反应条件。在[THTdP][MS]存在下，在微波反应器中使用碱四-2-吡啶基吡嗪实现最高产率91%。该催化体系可循环使用至少6次，活性损失小于0.5%。
Well-dispersed iridium(0) nanoparticles stabilized with the ionic liquid, trihexyltetradecylphosphonium methylsulfonate, [THTdP][MS], have been successfully prepared by reduction of the precursor hydridoiridium carborane, (Ph3P)(2)Ir(H)-(7,8-nido-C2B9H11). The iridium nanoparticles were found to be active catalysts for arylborylation, forming boric acids. The activity of the catalyst has been investigated as a function of the activating base, and reaction conditions. The highest yield of 91% was achieved in a microwave reactor using the base, tetra-2-pyridinylpyrazine, in the presence of [THTdP][MS]. The catalytic system could be recycled at least six times with less than a 0.5% loss of activity.