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- W4313946435 abstract "Photoinduced hydrogen atom transfer (HAT) has been developed as a powerful tool to generate synthetically valuable radical species. The direct photoexcitation of ketones has been known to promote HAT or to generate acyl radicals through Norrish-type pathways, but these modalities remain severely limited by radical side reactions. We report herein a catalyst- and transition metal-free method for the acylation of C-H bonds that leverages the unique properties of stable, isolable acyl azolium species. Specifically, acyl azolium salts are shown to undergo an intermolecular and regioselective HAT upon LED irradiation with a range of substrates bearing active C-H bonds followed by C-C bond formation to afford ketones. Experimental and computational studies support photoexcitation of the acyl azolium followed by facile intersystem crossing to access triplet diradical species that promote selective HAT and radical-radical cross-coupling." @default.
- W4313946435 created "2023-01-10" @default.
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- W4313946435 date "2023-01-10" @default.
- W4313946435 modified "2023-10-17" @default.
- W4313946435 title "Photoinduced Acylations Via Azolium-Promoted Intermolecular Hydrogen Atom Transfer" @default.
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- W4313946435 doi "https://doi.org/10.1021/jacs.2c12845" @default.
- W4313946435 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36625715" @default.
- W4313946435 hasPublicationYear "2023" @default.
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