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Alternating Cascade Metathesis Polymerization of Enynes and Cyclic Enol Ethers with Active Ruthenium Fischer Carbenes
- Source :
- J Am Chem Soc
- Publication Year :
- 2020
- Publisher :
- American Chemical Society (ACS), 2020.
-
Abstract
- Ruthenium alkoxymethylidene complexes have rarely been demonstrated as active species in metathesis reactions and are frequently regarded as inert. Herein, we highlight the ability of these Fischer-type carbenes to participate in cascade alternating ring-opening metathesis polymerization (AROMP) through their efficient alkyne addition reactions. When enyne monomers are combined with low-strain cyclic vinyl ethers, a controlled chain-growth copolymerization occurs that exhibits high degrees of alternation (>90% alternating diads) and produces degradable poly(vinyl ether) materials with low dispersities and targetable molecular weights. This new method is amenable to the synthesis of alternating diblock polymers that can be degraded to small molecule fragments under aqueous acidic conditions. This work furthers the potential of Fischer-type ruthenium alkylidenes in polymerization strategies and presents new avenues for the generation of functional metathesis materials.
- Subjects :
- chemistry.chemical_element
Alkyne
010402 general chemistry
Metathesis
01 natural sciences
Biochemistry
Article
Ruthenium
Catalysis
Polymerization
Colloid and Surface Chemistry
Ethers, Cyclic
Organometallic Compounds
Copolymer
Salt metathesis reaction
Ring-opening metathesis polymerisation
chemistry.chemical_classification
Molecular Structure
Enyne
Chemistry
General Chemistry
Combinatorial chemistry
0104 chemical sciences
Alkynes
Methane
Subjects
Details
- ISSN :
- 15205126 and 00027863
- Volume :
- 142
- Database :
- OpenAIRE
- Journal :
- Journal of the American Chemical Society
- Accession number :
- edsair.doi.dedup.....426551ad99992477e68b8b92ec7cdb07