Dinuclear Aluminum Poly(phenolate) Complexes as Efficient Catalysts for Cyclic Carbonate Synthesis

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• 作者：Pengfei Gao ; Zhiwen Zhao ; Lijuan Chen ; Dan Yuan ; Yingming Yao
• 刊名：Organometallics
• 出版年：2016
• 出版时间：June 13, 2016
• 年：2016
• 卷：35
• 期：11
• 页码：1707-1712
• 全文大小：415K
• 年卷期：0
• ISSN：1520-6041

文摘

A series of dinuclear aluminum complexes 1–4 stabilized by amine-bridged poly(phenolato) ligands have been synthesized, which are highly active in catalyzing the cycloaddition of epoxides and CO₂. In the presence of 0.3 mol % complex 3 and 0.9 mol % NBu₄Br at 1 bar CO₂ pressure, terminal epoxides bearing different functional groups were converted to cyclic carbonates in 60–97% yields. Complex 3 is one of the rare examples of Al-based catalysts capable of promoting the cycloaddition at 1 bar pressure of CO₂. Moreover, reactions of more challenging disubstituted epoxides also proceeded at an elevated pressure of 10 bar and afforded cyclic carbonates in 52–90% yields.