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A metal‐free cascade annulation of propagylamines with amidines for divergent synthesis of polysubstituted imidazoles and 4‐alkenylquinazolines has been developed. The reaction is believed to proceed by sequential 1,4‐conjugate addition of amidines to propargylamines, 5‐exo‐dig annulation/aromatization to form the polysubstituted imidazoles, and nucleophilic addition/elimination/aromatization to quinazoline...
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