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Multicomponent Cyclopolymerization of Alkynes, Isocyanides and Isocyanates Toward Heterocyclic Polymers

preprint
submitted on 11.03.2021, 22:01 and posted on 16.03.2021, 10:30 by Xiaoheng Wang, Baixue Li, Jianwen Peng, Bingnan Wang, Anjun Qin, Ben Zhong Tang

Multicomponent cyclopolymerization (MCCP) based on isocyanides, among the tremendous synthetic methodologies, is a powerful tool for the preparation of functional heterocyclic polymers like poly(maleimide)s (PMDs), which should be further developed. In this work, an atom-economic and catalyst-free MCCP of activated alkynes, diisocyanides and diisocyanates was fully explored. The PMDs with high weight-average molecular weights (Mw up to 29 000) were facilely produced in satisfactory yields (up to 85%). The resultant polymers showed excellent solubility, high thermal stability, and good film-forming ability, and their thin films possessed high refraction indices (RI) in a range of 1.613 to 1.708 at 632.8 nm. Therefore, this work not only supplements the isocyanide-based multicomponent cyclopolymerizations but also enriches the family of polymerization reactions based on triple-bond building blocks.

History

Email Address of Submitting Author

msqinaj@scut.edu.cn

Institution

South China University of Technology

Country

China

ORCID For Submitting Author

0000-0001-7158-1808

Declaration of Conflict of Interest

No conflict of interest.

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