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<p>Macromolecules with cyclic topologies have attracted significant attention because of the absence of polymer chain ends that clearly distinguishes them from linear or branched polymers. However, the synthesis of macrocyclic polymers, particularly those possessing multiple cyclic units, remains challenging. Recently, our research group established a highly efficient method for the synthesis of multicyclic polymers without the use of cyclic precursors. This review provides a comprehensive overview of our recent studies and relevant research on the precise synthesis of multicyclic polymers, including cage-shaped polymers, <i>spiro</i>-multicyclic polymers, and graft polymers with macromolecular cyclic or cage side chains, via intramolecular ring-opening metathesis oligomerization or the cyclopolymerization of norbornenyl-functionalized macromonomers, mediated by third-generation Grubbs catalysts. In addition, their fundamental properties and potential applications are briefly discussed.</p>

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Multicyclic polymer synthesis via a consecutive cyclization approach

  • 期刊论文

  • 发表日期：

    2025年8月19日

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  • Yamato Ebii,
  • Minami Ebe,
  • Feng Li,
  • Takuya Isono,
  • Toshifumi Satoh

摘要

Macromolecules with cyclic topologies have attracted significant attention because of the absence of polymer chain ends that clearly distinguishes them from linear or branched polymers. However, the synthesis of macrocyclic polymers, particularly those possessing multiple cyclic units, remains challenging. Recently, our research group established a highly efficient method for the synthesis of multicyclic polymers without the use of cyclic precursors. This review provides a comprehensive overview of our recent studies and relevant research on the precise synthesis of multicyclic polymers, including cage-shaped polymers, spiro-multicyclic polymers, and graft polymers with macromolecular cyclic or cage side chains, via intramolecular ring-opening metathesis oligomerization or the cyclopolymerization of norbornenyl-functionalized macromonomers, mediated by third-generation Grubbs catalysts. In addition, their fundamental properties and potential applications are briefly discussed.