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Tethered bis‐2,5‐dimethylene‐2,5‐dihydrofurans were generated in the gas phase by flash vacuum pyrolysis (FVP) of diester precursors. These furan‐based bis(p‐quinodimethanes) are shown to undergo reactions leading to macrocycles. The observed products strongly support a mechanism involving cyclic diradical intermediates. Formation of the furan‐based p‐quinodimethane and the corresponding cyclization...
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