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Herein, we report an efficient strategy for the remote C−H pyridylation of hydroxamates with excellent ortho‐selectivity by designing a new class of photon‐absorbing O‐aryl oxime pyridinium salts generated in situ from the corresponding pyridines and hydroxamates. When irradiated by visible light, the photoexcitation of oxime pyridinium intermediates generates iminyl radicals via the photolytic N−O...
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