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Ogawa KA, Goetz AE, Boydston AJ. Metal-free ring-opening metathesis polymerization. J Am Chem Soc. 2015;137(4):1400-3doi: 10.1021/ja512073m.
Ogawa, K. A., Goetz, A. E., & Boydston, A. J. (2015). Metal-free ring-opening metathesis polymerization. Journal of the American Chemical Society, 137(4), 1400-3. https://doi.org/10.1021/ja512073m
Ogawa, Kelli A, et al. "Metal-free ring-opening metathesis polymerization." Journal of the American Chemical Society vol. 137,4 (2015): 1400-3. doi: https://doi.org/10.1021/ja512073m
Ogawa KA, Goetz AE, Boydston AJ. Metal-free ring-opening metathesis polymerization. J Am Chem Soc. 2015 Feb 04;137(4):1400-3. doi: 10.1021/ja512073m. Epub 2015 Jan 21. PMID: 25573294.
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J Am Chem Soc. 2015 Feb 04;137(4):1400-3. doi: 10.1021/ja512073m. Epub 2015 Jan 21.

Metal-free ring-opening metathesis polymerization.

Journal of the American Chemical Society

Kelli A Ogawa, Adam E Goetz, Andrew J Boydston

Affiliations

  1. Department of Chemistry, University of Washington , Seattle, Washington 98195, United States.

PMID: 25573294 DOI: 10.1021/ja512073m

Abstract

We have developed a method to achieve ring-opening metathesis polymerization (ROMP) mediated by oxidation of organic initiators in the absence of any transition metals. Radical cations, generated via one-electron oxidation of vinyl ethers, were found to react with norbornene to give polymeric species with microstructures essentially identical to those traditionally obtained via metal-mediated ROMP. We found that vinyl ether oxidation could be accomplished under mild conditions using an organic photoredox mediator. This led to high yields of polymer and generally good correlation between M(n) values and initial monomer to catalyst loadings. Moreover, temporal control over reinitiation of polymer growth was achieved during on/off cycles of light exposure. This method demonstrates the first metal-free method for controlled ROMP.

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