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Birch-Type Photoreduction of Arenes and Heteroarenes by Sensitized Electron Transfer.


ABSTRACT: The direct reduction of arenes and heteroarenes by visible-light irradiation remains challenging, as the energy of a single photon is not sufficient for breaking aromatic stabilization. Shown herein is that the energy accumulation of two visible-light photons allows the dearomatization of arenes and heteroarenes. Mechanistic investigations confirm that the combination of energy-transfer and electron-transfer processes generates an arene radical anion, which is subsequently trapped by hydrogen-atom transfer and finally protonated to form the dearomatized product. The photoreduction converts planar aromatic feedstock compounds into molecular skeletons that are of use in organic synthesis.

SUBMITTER: Chatterjee A 

PROVIDER: S-EPMC6790943 | biostudies-literature |

REPOSITORIES: biostudies-literature

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