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- W4225670829 abstract "1,3,2-diazaphospholenes hydrides (DAP-Hs) are highly nucleophilic organic hydrides serving as main-group catalysts for a range of attractive transformations. DAP hydrides can act as stoichiometric hydrogen atom transfer agents in radical reactions. Herein, we report a DAP-catalyzed reductive radical cyclization of a broad range of aryl and alkyl halides under mild conditions. The pivotal DAP catalyst turnover was achieved by a DBU-assisted σ-bond metathesis between the formed DAP halide and HBpin, which rapidly regenerates DAP-H. The transformation is significantly accelerated by irradiation with visible light. Mechanistic investigations indicate that visible light irradiation leads to the formation of DAP dimers, which are in equilibrium with DAP radicals and accelerate the cyclization. The direct use of (DAP)2 enabled a catalytic protocol in the absence of light." @default.
- W4225670829 created "2022-05-05" @default.
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- W4225670829 date "2022-05-06" @default.
- W4225670829 modified "2023-10-16" @default.
- W4225670829 title "1,3,2‐Diazaphospholene‐Catalyzed Reductive Cyclizations of Organohalides**" @default.
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- W4225670829 doi "https://doi.org/10.1002/anie.202202306" @default.
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