Synthesis of the left hand unit of batzelladine F; revision of the reported relative stereochemistry

Article abstract of DOI:10.1016/S0040-4020(99)00288-4

The addition of guanidine to the bis-α,β-unsaturated ketone 17 is reported, leading to the formation of the tricyclic guanidine 18, the left hand portion of the naturally occurring alkaloid batzelladine F. Nmr evidence is given which casts doubt upon the assignment of the relative stereochemistry of this metabolite.