Journal
CHINESE JOURNAL OF ORGANIC CHEMISTRY
Volume 43, Issue 2, Pages 629-635Publisher
SCIENCE PRESS
DOI: 10.6023/cjoc202206047
Keywords
manganese catalysis; carbon dioxide; cyclic carbonate; CO2 utilization; N-heterocyclic carbene
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The bidentate N-heterocyclic carbene (NHC)-pyridine nitrogen manganese complex was utilized as a catalyst for the coupling reaction between epoxides and CO2. The binary system of the manganese complex Mn-2 and tetrabutylammonium iodide (TBAI) showed high activity in the synthesis of cyclic carbonates. This binary catalytic system is versatile for various substrates, including both terminal and sterically hindered internal epoxides. A potential catalytic pathway was proposed based on analysis using UV-vis, FT-IR, and HRMS techniques.
The bidentate N-heterocyclic carbene (NHC)-pyridine nitrogen manganese complex catalyzed coupling reaction of epoxides with CO2 was developed. The binary system resulting from the manganese complex Mn-2 in combination with tetrabutylammonium iodide (TBAI) exhibits the high activity for the synthesis of cyclic carbonate from epoxides and CO2. The binary catalytic system is suitable for a broad range of substrates scope, such as terminal epoxides and sterically hindered internal epoxides. A possible catalytic pathway was elaborated by UV-vis, FT-IR and HRMS method.
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