Pengfei Gao, Zhiwen Zhao, Lijuan Chen, Dan Yuan^*（袁丹）, and Yingming Yao^*（姚英明）

Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People’s Republic of China

Organometallics, 2016, 35 (11), pp 1707–1712

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.

链接：http://pubs.acs.org/doi/abs/10.1021/acs.organomet.6b00153