2015 Fiscal Year Annual Research Report
Reductive Incorporation of Carbon Dioxide into Value-Added Chemicals
| Project/Area Number |
26810027
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| Research Institution | Institute of Physical and Chemical Research |
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Principal Investigator |
張 亮 国立研究開発法人理化学研究所, 侯有機金属化学研究室, 研究員 (20610992)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Keywords | carbon dioxide / aldehyde / boron / carbene ligand / metal catalysis |
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| Outline of Annual Research Achievements |
The use of carbon dioxide (CO2) as a C1 building block for the synthesis of useful chemicals has received increasing attention from both academia and industry. However, the chemical transformations of CO2 for practical applications remained very limited because of its thermodynamic stability and kinetic inertness.
Recently, functional lithium borate salts have attracted intensive interest as electrolytes for high performance lithium batteries. However, the availability of diversified functional lithium borate salts is quite limited due to the lack of efficient and versatile synthetic methods. In view of the importance of lithium borates, cyclic carbonates and their combinations, lithium borate salts containing both a cyclic carbonate structure and a borate unit in one molecule are of much interest.
We have achieved the first catalytic selective multi-component coupling of carbon dioxide, bis(pinacolato)diboron, LiOtBu, and a wide range of aldehydes by using an nitrogen heterocyclic carbene-copper catalyst. This reaction has efficiently afforded a series of novel lithium cyclic boracarbonate ion pair compounds in high yields from readily available starting materials. This protocol has not only provided a new catalytic process for the utilization of carbon dioxide, but it has also constituted a novel route for the efficient synthesis of a new class of lithium borate compounds that might be of interest as potential electrolyte candidates for lithium ion batteries.
The manuscript of this work has been published in Angewandte Chemie International Edition.
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