Transannular dipolar cycloaddition as an approach towards the synthesis of the core ring system of the sarain alkaloids.


Intramolecular transannular dipolar cycloaddition was investigated as a key step in a synthetic approach to the core of the sarain alkaloids; although the use of an azomethine ylide was unsuccessful with the chosen aldehyde substrate, cycloaddition with a nitrone did give the alternative regioisomeric bridged cycloadduct. 
DOI: 10.1039/c0ob01019g


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