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• W2882983721 abstract "Carbon radicals are reactive species useful in various organic transformations. The C-X bond cleavage of organohalides by photoirradiation is a common method to generate carbon radicals in a controlled fashion. The use of organochloride substrates is still a formidable challenge due to the low reduction potential and the high dissociation energy of the C-Cl bond. In this report, we address these issues by using a nonmetal organic molecule with a relatively simple structure as a photocatalyst. In this catalyst (bis(dimethylamino)carbazole), the amino groups increase both the HOMO and LUMO energy levels, especially in the former. As a result, compared to the parent molecule, the new catalyst shows experimentally red-shifted absorption in the visible region and forms an excited state with better reducing capability. This photocatalyst was used in the reduction of unactivated aryl chlorides and alkyl chlorides in the presence of hydrogen atom donor at room temperature. The catalytic system can also be applied to the coupling of aryl chlorides with electron-rich arene and heteroarenes to affect the C-C bond-forming reactions. Our mechanistic study results support the assumption that carbon radicals are formed from the organochlorides via a single-electron-transfer step." @default.
• W2882983721 created "2018-08-03" @default.
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• W2882983721 date "2018-07-13" @default.
• W2882983721 modified "2023-10-02" @default.
• W2882983721 title "UVA- and Visible-Light-Mediated Generation of Carbon Radicals from Organochlorides Using Nonmetal Photocatalyst" @default.
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• W2882983721 doi "https://doi.org/10.1021/acs.joc.8b01306" @default.
• W2882983721 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30005575" @default.
• W2882983721 hasPublicationYear "2018" @default.
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