Abstract
The properties of poly(vinyl ether)s (PVEs) are highly dependent on their tacticity, and the appealing thermoplastics features of isotactic PVEs have drawn considerable efforts to develop stereoselective cationic polymerization methods to access this class of polymers. However, reported methods that could achieve a high degree of tacticity control are limited to process employing metal-based Lewis acids, and with various limitations on catalyst loading, monomer scope, etc. Here, we introduce a metal-free stereoselective cationic polymerization of vinyl ethers by employing a class of chiral confined Brønsted acids, imidodiphosphorimidates (IDPis), as the catalyst. This organocatalytic approach features its metal free conditions, high efficiency, high stereoselectivity, single catalyst system, operation simplicity, etc.
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A patent (CN 202110033389.X) has been filed on this stereoselective polymerization method employing chiral confined Brønsted acids as the catalyst on 2021-01-12. This manuscript was first published as a preprint on ChemRxiv (Cambridge: Cambridge Open Engage, 2021), doi: https://doi.org/10.33774/chemrxiv-2021-qlpbp on 2021-10-04
For a similar work concurrently published on 2021-10-01, see: Knutson PC, Teator AJ, Varner TP, Kozuszek CT, Jacky PE, Leibfarth FA. J Am Chem Soc, 2021, 143: 16388–16393
Acknowledgements
This work was supported by the Recruitment Program of Global Experts, Beijing National Laboratory for Molecular Sciences (BNLMS201913), and Fuzhou University.
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Organocatalytic Stereoselective Cationic Polymerization of Vinyl Ethers by Employing a Confined Brønsted Acid as the Catalyst
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Yang, Z., Zhang, X., Jiang, Y. et al. Organocatalytic stereoselective cationic polymerization of vinyl ethers by employing a confined brønsted acid as the catalyst. Sci. China Chem. 65, 304–308 (2022). https://doi.org/10.1007/s11426-021-1143-x
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DOI: https://doi.org/10.1007/s11426-021-1143-x