NHC-Iridium-Catalyzed Deoxygenative Coupling of Primary Alcohols Producing Alkanes Directly: Synergistic Hydrogenation with Sodium Formate Generated in Situ
作者:Zeye Lu、Qingshu Zheng、Siqi Yang、Chun Qian、Yajing Shen、Tao Tu
DOI:10.1021/acscatal.1c02700
日期:2021.9.3
The direct conversion of alcohols into long-chain alkanes is an attractive but extremely challenging approach for biomass upgrading. Here, we describe the highly selective deoxygenative coupling of aryl ethanols with primary alcohols to produce alkanes, using a bis-N-heterocyclic carbene iridium (bis-NHC-Ir) complex as the catalyst. Up to quantitative yields and selectivity with a broad substrate scope
将醇直接转化为长链烷烃是一种有吸引力但极具挑战性的生物质升级方法。在这里,我们描述了芳基乙醇与伯醇的高选择性脱氧偶联以生产烷烃,使用双-N-杂环卡宾铱(双-NHC-Ir)配合物作为催化剂。在均偶联反应和交叉偶联反应中均实现了具有广泛底物范围的定量产率和选择性。机理研究表明,在双-NHC-Ir 存在下原位生成的甲酸盐对烯烃中间体的进一步协同加氢对于烷烃生产至关重要。