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Synthesis and Characterization of Bimetallic Nanoclusters Stabilized by Chiral and Achiral Polyvinylpyrrolidinones. Catalytic C(sp3)–H Oxidation
dc.contributor.author | Fan, Huafang | |
dc.contributor.author | Tong, Zongbo | |
dc.contributor.author | Ren, Zhaoyang | |
dc.contributor.author | Mishra, Kanchan | |
dc.contributor.author | Morita, Shunya | |
dc.contributor.author | Edouarzin, Edruce | |
dc.contributor.author | Gorla, Lingaraju | |
dc.contributor.author | Averkiev, Boris | |
dc.contributor.author | Day, Victor W. | |
dc.contributor.author | Hua, Duy H. | |
dc.date.accessioned | 2022-08-12T20:54:14Z | |
dc.date.available | 2022-08-12T20:54:14Z | |
dc.date.issued | 2022-05-05 | |
dc.identifier.citation | Fan, H., Tong, Z., Ren, Z., Mishra, K., Morita, S., Edouarzin, E., Gorla, L., Averkiev, B., Day, V. W., & Hua, D. H. (2022). Synthesis and Characterization of Bimetallic Nanoclusters Stabilized by Chiral and Achiral Polyvinylpyrrolidinones. Catalytic C(sp3)-H Oxidation. The Journal of organic chemistry, 87(10), 6742–6759. https://doi.org/10.1021/acs.joc.2c00449 | en_US |
dc.identifier.uri | http://hdl.handle.net/1808/33183 | |
dc.description | This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Organic Chemistry, copyright © 2022 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.joc.2c00449. | en_US |
dc.description.abstract | Second-generation chiral-substituted poly-N-vinylpyrrolidinones (CSPVPs) (−)-1R and (+)-1S were synthesized by free-radical polymerization of (3aR,6aR)- and (3aS,6aS)-5-ethenyl-tetrahydro-2,2-dimethyl-4H-1,3-dioxolo[4,5-c]pyrrol-4-one, respectively, using thermal and photochemical reactions. They were produced from respective d-isoascorbic acid and d-ribose. In addition, chiral polymer (−)-2 was also synthesized from the polymerization of (S)-3-(methoxymethoxy)-1-vinylpyrrolidin-2-one. Molecular weights of these chiral polymers were measured using HRMS, and the polymer chain tacticity was studied using 13C NMR spectroscopy. Chiral polymers (−)-1R, (+)-1S, and (−)-2 along with poly-N-vinylpyrrolidinone (PVP, MW 40K) were separately used in the stabilization of Cu/Au or Pd/Au nanoclusters. CD spectra of the bimetallic nanoclusters stabilized by (−)-1R and (+)-1S showed close to mirror-imaged CD absorption bands at wavelengths 200–300 nm, revealing that bimetallic nanoclusters’ chiroptical responses are derived from chiral polymer-encapsulated nanomaterials. Chemo-, regio-, and stereo-selectivity was found in the catalytic C–H group oxidation reactions of complex bioactive natural products, such as ambroxide, menthofuran, boldine, estrone, dehydroabietylamine, 9-allogibberic acid, and sclareolide, and substituted adamantane molecules, when catalyst Cu/Au (3:1) or Pd/Au (3:1) stabilized by CSPVPs or PVP and oxidant H2O2 or t-BuOOH were applied. Oxidation of (+)-boldine N-oxide 23 using NMO as an oxidant yielded 4,5-dehydroboldine 27, and oxidation of (−)-9-allogibberic acid yielded C6,15 lactone 47 and C6-ketone 48. | en_US |
dc.publisher | American Chemical Society | en_US |
dc.rights | Copyright © 2022 American Chemical Society | en_US |
dc.subject | Bimetals | en_US |
dc.subject | Molecules | en_US |
dc.subject | Nanoclusters | en_US |
dc.subject | Oxidation | en_US |
dc.subject | Polymers | en_US |
dc.title | Synthesis and Characterization of Bimetallic Nanoclusters Stabilized by Chiral and Achiral Polyvinylpyrrolidinones. Catalytic C(sp3)–H Oxidation | en_US |
dc.type | Article | en_US |
kusw.kuauthor | Day, Victor W. | |
kusw.kudepartment | Chemistry | en_US |
dc.identifier.doi | 10.1021/acs.joc.2c00449 | en_US |
dc.identifier.orcid | https://orcid.org/0000-0001-7179-0108 | en_US |
kusw.oaversion | Scholarly/refereed, author accepted manuscript | en_US |
kusw.oapolicy | This item meets KU Open Access policy criteria. | en_US |
dc.identifier.pmid | PMC35511477 | en_US |
dc.rights.accessrights | embargoedAccess | en_US |