Exploiting multiple nucleophilic sites on pyrrole for the assembly of polyheterocyclic frameworks: application to a formal total synthesis of (±)-aspidospermidine
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Banwell, Martin
Smith, Jason A
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Royal Society of Chemistry
Abstract
The tricyclic ketone 19, an advanced intermediate in Aubé's recently reported synthesis of aspidospermidine (4), is prepared in twelve steps from pyrrole (3). The key transformations involve a previously described intramolecular Michael addition reaction
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Journal of the Chemical Society, Perkin Transactions 1