Polyoxometalate-based homochiral metal-organic frameworks for tandem asymmetric transformation of cyclic carbonates from olefins

Qiuxia Han, Bo Qi, Weimin Ren, Cheng He, Jingyang Niu and Chunying Duan ()
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Qiuxia Han: State Key Laboratory of Fine Chemicals, Dalian University of Technology
Bo Qi: State Key Laboratory of Fine Chemicals, Dalian University of Technology
Weimin Ren: State Key Laboratory of Fine Chemicals, Dalian University of Technology
Cheng He: State Key Laboratory of Fine Chemicals, Dalian University of Technology
Jingyang Niu: Key Laboratory of Polyoxometalate Chemistry of Henan Province, College of Chemistry and Chemical Engineering, Henan University
Chunying Duan: State Key Laboratory of Fine Chemicals, Dalian University of Technology

Nature Communications, 2015, vol. 6, issue 1, 1-8

Abstract: Abstract Currently, great interest is focused on developing auto-tandem catalytic reactions; a substrate is catalytically transferred through mechanistically distinct reactions without altering any reaction conditions. Here by incorporating a pyrrolidine moiety as a chiral organocatalyst and a polyoxometalate as an oxidation catalyst, a powerful approach is devised to achieve a tandem catalyst for the efficient conversion of CO2 into value-added enantiomerically pure cyclic carbonates. The multi-catalytic sites are orderly distributed and spatially matched in the framework. The captured CO2 molecules are synergistically fixed and activated by well-positioned pyrrolidine and amine groups, providing further compatibility with the terminal W=O activated epoxidation intermediate and driving the tandem catalytic process in a single workup stage and an asymmetric fashion. The structural simplicity of the building blocks and the use of inexpensive and readily available chemical reagents render this approach highly promising for the development of practical homochiral materials for CO2 conversion.

Date: 2015
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DOI: 10.1038/ncomms10007

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