A Ru(II) NHC complex (loading down to 0.001 mol%) catalyzed cross coupling of a broad range of aromatic, aliphatic and heterocyclic alcohols is reported. This protocol also functioned efficiently under solvent-free conditions. Remarkably, this catalytic system disclosed so far the highest TON of 288000 for the cross coupling of alcohols. Notably, this methodology was successfully applied for the one-pot synthesis of a range of flavan derivatives. A detailed DFT studies and kinetic experiments were performed to understand the reaction mechanism as well as the high reactivity of this catalytic system.

中文翻译：

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醇的串联交叉偶联反应可持续合成β-烷基化仲醇和黄酮衍生物

据报道，Ru（II）NHC络合物（负载量低至0.001 mol％）催化了多种芳族，脂族和杂环醇的交叉偶联。该方案在无溶剂条件下也能有效发挥作用。显着地，该催化体系公开了迄今为止用于醇的交叉偶联的最高TON为288000。值得注意的是，该方法已成功用于一系列黄烷衍生物的一锅合成。进行了详细的DFT研究和动力学实验，以了解该催化体系的反应机理以及高反应活性。