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A concise method of constructing polycyclic tropinone frameworks was developed. The single‐step synthesis of polycyclic tropinone consists of an intramolecular [4+3] cycloaddition reaction of N‐nosyl‐pyrrole with oxyallyl cation that was generated in situ by an intermolecular condensation reaction of the nucleophilic functional groups on a tethered pyrrole with the aldehyde of 2‐(silyloxy)‐acrolein...
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