Herein, we disclose a strategy to
realize α,β-difunctionalization
and C–N bond cleavage of saturated amines with benzo[c]isoxazoles via a B(C6F5)3-catalyzed consecutive hydrogen-borrowing and [4 + 2] cycloaddition
followed by a C–N bond cleavage process. In general, the reactions
proceed efficiently in the absence of any oxidant and metal catalyst
to afford a broad range of quinoline derivatives starting from easily
accessible substrates in an atom-economical manner.
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