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The “bottom-up” construction of chiral porous organic polymers for heterogeneous asymmetric organocatalysis: MacMillan catalyst built-in nanoporous organic frameworks

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Abstract

Although many porous organic polymers (POPs) embedded with chiral ligand–metal catalytic activities have been examined as heterogeneous asymmetric catalysts, examples of metal-free stereoselective POP catalysts are very scarce. Herein, we report a “bottom-up” strategy used to construct a MacMillan catalyst-embedded chiral porous organic polymer, Mac-CPOPs. The porosity of the Mac-CPOPs frameworks could be adjusted by varying the molecular length of the rigid structural monomers. Due to the high Brunauer–Emmett–Teller specific surface area and the built-in character of the covalently linked MacMillan catalyst, the Mac-CPOP-2 polymer can be applied as a highly efficient and recoverable heterogeneous organocatalyst in the asymmetric Diels–Alder reaction, which gives products in good yields and with good enantioselectivity. Moreover, the Mac-CPOP-2 polymer can be reused 6 times for the asymmetric Diels–Alder reaction without any significant loss of catalytic activity and enantioselectivity.

Graphical abstract: The “bottom-up” construction of chiral porous organic polymers for heterogeneous asymmetric organocatalysis: MacMillan catalyst built-in nanoporous organic frameworks

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Publication details

The article was received on 07 Jul 2017, accepted on 07 Aug 2017 and first published on 07 Aug 2017


Article type: Paper
DOI: 10.1039/C7PY01127J
Citation: Polym. Chem., 2017, Advance Article
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    The “bottom-up” construction of chiral porous organic polymers for heterogeneous asymmetric organocatalysis: MacMillan catalyst built-in nanoporous organic frameworks

    C. Wang, Y. Li, Y. Han, J. Zhang, R. Wu and G. He, Polym. Chem., 2017, Advance Article , DOI: 10.1039/C7PY01127J

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