Volume 133, Issue 11 pp. 6151-6158
Forschungsartikel

Confinement-Driven Enantioselectivity in 3D Porous Chiral Covalent Organic Frameworks

Bang Hou

Bang Hou

School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, 200240 China

These authors contributed equally to this work.

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Shi Yang

Shi Yang

School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, 200240 China

These authors contributed equally to this work.

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Kuiwei Yang

Kuiwei Yang

Department of Chemical and Biomolecular Engineering, National University of Singapore, 117576 Singapore, Singapore

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Xing Han

Xing Han

School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, 200240 China

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Xianhui Tang

Xianhui Tang

School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, 200240 China

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Prof. Yan Liu

Corresponding Author

Prof. Yan Liu

School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, 200240 China

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Prof. Jianwen Jiang

Corresponding Author

Prof. Jianwen Jiang

Department of Chemical and Biomolecular Engineering, National University of Singapore, 117576 Singapore, Singapore

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Prof. Yong Cui

Corresponding Author

Prof. Yong Cui

School of Chemistry and Chemical Engineering, Frontiers Science Center for Transformative Molecules and State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, Shanghai, 200240 China

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First published: 09 December 2020
Citations: 7

Abstract

3D covalent organic frameworks (COFs) with well-defined porous channels are shown to be capable of inducing chiral molecular catalysts from non-enantioselective to highly enantioselective in catalyzing organic transformations. By condensations of a tetrahedral tetraamine and two linear dialdehydes derived from enantiopure 1,1′-binaphthol (BINOL), two chiral 3D COFs with a 9-fold or 11-fold interpenetrated diamondoid framework are prepared. Enhanced Brønsted acidity was observed for the chiral BINOL units that are uniformly distributed within the tubular channels compared to the non-immobilized acids. This facilitates the Brønsted acid catalysis of cyclocondensation of aldehydes and anthranilamides to produce 2,3-dihydroquinazolinones. DFT calculations show the COF catalyst provides preferential secondary interactions between the substrate and framework to induce enantioselectivities that are not achievable in homogeneous systems.

Conflict of interest

The authors declare no conflict of interest.

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