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Asymmetric polymerization of N-triphenylmethylmaleimide with chiral anionic initiators

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Summary

Asymmetric polymerization of N-triphenylmethylmaleimide(TrMI) is performed with chiral anionic initiators in tetrahydrofuran and toluene at −78 and 0°C to obtain optically active polymer. It is found that the (S)-(+)-l-(2-pyrrolidinylmethyl) pyrrolidinelithium [Li-(+)-PMP] and lithium (−)-menthoxide are effective for the asymmetric polymerization of N-triphenylmethylmaleimide in THF. The polymers obtained are characterized by circular dichroism(CD). It is inferred that the propagation reaction of polymerization of TrMI with Li-(+)-PMP is dominated by ion pair mechanism and meanwhile free ion mechanism cannot be ignored based on GPC analysis.

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Authors and Affiliations

  1. Institute of Chemistry, Chinese Academy of Sciences, 100080, Beijing, P.R. China

    Weihong Liu, Chuanfu Chen, Yongming Chen & Fu Xi

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  1. Weihong Liu
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  2. Chuanfu Chen
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  3. Yongming Chen
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  4. Fu Xi
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Liu, W., Chen, C., Chen, Y. et al. Asymmetric polymerization of N-triphenylmethylmaleimide with chiral anionic initiators. Polymer Bulletin 38, 509–514 (1997). https://doi.org/10.1007/s002890050080

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  • DOI: https://doi.org/10.1007/s002890050080

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