A biomimetic synthesis of the marine thioalkaloids dassonmycins A and B is reported. The synthesis features a chemoselective reduction of a diketopiperazine to form a 2-piperazinone, which undergoes heteroannulation with naphthoquinone to yield dassonmycin A. Dassonmycin A undergoes slow cyclization to form dassonmycin B at physiological pH, supporting a biosynthesis hypothesis that this reaction could occur in the cytosol of the bacterial host species.
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http://dx.doi.org/10.1021/acs.orglett.4c03937 | DOI Listing |
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