An efficient and recyclable tetraoxo-coordinated zinc catalyst for the cycloaddition of epoxides with carbon dioxide at atmospheric pressure

作者：Ma, Ran^*; He, Liang-Nian; Zhou, Yue-Biao

来源：Green Chemistry, 2016, 18(1): 226-231.

DOI：10.1039/c5gc01826a

• SOLVENT-FREE CONDITIONS
• CYCLIC CARBONATES
• SALEN COMPLEXES
• MILD CONDITIONS
• ORGANIC CARBONATES
• METAL-COMPLEXES
• N-OXIDES
• BIFUNCTIONAL CATALYSTS
• COUPLING REACTIONS
• CHEMICAL FIXATION

An efficient and recyclable catalytic system of a Zn(O)(4)-coordinated complex e.g. 2-hydroxypyridine N-oxide zinc(II), Zn(OPO)(2) and tetrabutylammonium iodide (TBAI) was developed for the cyclic carbonate synthesis from epoxides and CO2 without the use of any organic solvents. This easily prepared, low-toxic Zn(OPO)(2) may have a strong Lewis acidity for the activation of epoxides and exhibited high activity (TOF up to 22 000 h(-1)) even at a CO2 pressure as low as 1 bar with a broad substrate scope. Furthermore, the catalyst can be easily recovered and reused five times without a significant loss of its catalytic activity.

• 出版日期2016
• 单位南开大学