A Ring Formation by Photocycloaddition to Pyrrolobenzazepines

The synthesis of the 3-epimeric schelhammericines, being the first synthesis approach to a homoerythrinane alkaloid at all (111), is based 

Simultaneous B Ring Formation/C Ring Expansion Starting from Spiro-2-tetralones 

An original approach to the homoerythrinane framework represents the one pot tandem or domino alkylation-Michael addition sequence of 2-tetralones, followed by N-insertion via intramolecular 

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