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- W4385992041 abstract "Visible-light photoredox catalysis is well-established as a powerful and versatile organic synthesis strategy. However, some substrate classes, despite being attractive precursors, are recalcitrant to single-electron redox chemistry and thus not very amenable to photoredox approaches. Among these are carbonyl derivatives, e.g. ketones, aldehydes, and imines, which in most cases require Lewis or Brønsted acidic additives to activate via photoinduced electron transfer. In this work, we unveil a range of photoredox transformations on ketones and imines, enabled by strongly reducing photosensitizers and operating under simple, general conditions with a single sacrificial reductant and no additives. Specific reactions described here are umpolung C-C bond forming reactions between aromatic ketones or imines and electron-poor alkenes, imino-pinacol homocoupling reactions of challenging alkyl-aryl imine substrates, and γ-lactonization reactions of aromatic ketones with methyl acrylate. The reactions are all initiated by photoinduced electron transfer to form a ketyl or iminyl that is subsequently trapped." @default.
- W4385992041 created "2023-08-19" @default.
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- W4385992041 date "2023-01-01" @default.
- W4385992041 modified "2023-10-14" @default.
- W4385992041 title "Reductive photoredox transformations of carbonyl derivatives enabled by strongly reducing photosensitizers" @default.
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- W4385992041 doi "https://doi.org/10.1039/d3sc03000h" @default.
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- W4385992041 hasPublicationYear "2023" @default.
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