The structure of neolitsine (I) has been confirmed by synthesis of the racemic compound, prepared from benzylisoquinoline derivatives by a photolytic ring closure.
The aporphine series. Part I. Developments of the Bischler–Napieralski–Pschorr synthetic method. The synthesis of (±)-isobulbocapnine and (±)-actinodaphnine methyl ether