Incredible examples of controlling highly reactive functional groups to synthesize
amazing architectures can be found in nature. N-Acyl azahexatriene, which is involved in biosynthesis, is clearly among them, despite
the extremely limited number of examples disclosed in the literature. We explored
the biomimetic synthesis of macrocarbocyclic natural products, chejuenolides A–C,
as well as structural variants, to unveil the hidden stereochemical relationships
between their biosynthesis and those of lankacidin antibiotics. This revealed the
logic of the reaction pattern, which was likely influenced by catalytic promiscuity
in nature.
Key words
antibiotic - biomimetic synthesis - chejuenolide - macrocyclization - Mannich