James, Stella L. Routes to chiral N-acyliminium ion precursors for the synthesis of optically active pure ring-fused pyrroloisoquinoline alkaloids. Pyrrolisoquinoline (B) is found as a major structural motif of the erythrina alkaloid group of natural products. We recognised that a suitably substituted bicyclic lactam (A) could act as a precursor in an intramolecular N-acyliminium mediated cyclisation reaction in a stereoselective approach to the core of the erythrinane target ring system....cont'd untagged;Chemical Sciences not elsewhere classified 2013-08-08
    https://repository.lboro.ac.uk/articles/thesis/Routes_to_chiral_N-acyliminium_ion_precursors_for_the_synthesis_of_optically_active_pure_ring-fused_pyrroloisoquinoline_alkaloids_/9400133