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Postpolymerization modification of a sulfonyl fluoride‐decorated polynorbornene using the sulfur‐fluoride exchange click reaction

https://doi.org/10.1002/pol.20220409

Briceno, Edward S.; Stephen, Katrina; Hobbs, Christopher E. (September 2022, Journal of Polymer Science)

Abstract This contribution describes the ring opening metathesis polymerization of a sulfonyl fluoride decorated polynorbornene and its postsynthetic modification using the sulfur‐fluoride exchange “click” reaction.
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Ring Opening Metathesis Polymerization of a New Monomer Derived from a Nitroso Diels–Alder Reaction

https://doi.org/10.1002/macp.202100098

Subnaik, Selesha; Sheridan, Katya; Hobbs, Christopher E. (May 2021, Macromolecular Chemistry and Physics)

Abstract A nitroso Diels–Alder (NDA) reaction between cyclopentadiene and an in situ generated nitroso compound leads to a new heterocyclic monomer for ring opening metathesis polymerization (ROMP) reactions. This monomer could be polymerized in the presence of Grubbs‐third generation initiator with good control overM_nand decentÐvalues. The resulting isoxazolidine‐containing material could undergo further hydrogenation, deprotection, and modification with Dansyl chloride as well as ring opening to provide an amino‐and hydroxyl‐decorated “polyolefin.”
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Polymer-supported, photo-redox catalysts prepared from unimolecular photo-redox catalyst/initiator systems

https://doi.org/10.1016/j.tetlet.2020.152759

Peavy, Matthew; Hobbs, Christopher (February 2021, Tetrahedron Letters)
null (Ed.)
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Post-Polymerization Modification of Ring Opening Metathesis Polymerization (ROMP)-Derived Materials Using Wittig Reactions

https://doi.org/10.3390/polym12061247

Duty, Ryan; Hobbs, Christopher E. (June 2020, Polymers)
null (Ed.)
This communication describes our recent efforts to utilize Wittig olefination reactions for the post-polymerization modification of polynorbornene derivatives prepared through ring opening metathesis polymerization (ROMP). Polymerizing α-bromo ester-containing norbornenes provides polymers that can undergo facile substitution with triphenylphosphine. The resulting polymeric phosphonium salt is then deprotonated to form an ylide that undergoes reaction with various aryl aldehydes in a one-pot fashion to yield the respective cinnamates. These materials can undergo further modification through photo-induced [2 + 2] cycloaddition cross-linking reactions.
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