Pullella GA, Vuong D, Lacey E, Piggott MJ. Total Synthesis of the Antitumor-Antitubercular 2,6'-Bijuglone Natural Product Diospyrin and Its 3,6'-Isomer.
JOURNAL OF NATURAL PRODUCTS 2020;
83:3623-3634. [PMID:
33314932 DOI:
10.1021/acs.jnatprod.0c00800]
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Abstract
The 2,6'-bijuglone natural product diospyrin and its unnatural 3,6'-isomer idospyrin have been synthesized in seven steps each from N,N-diethylsenecioamide in overall yields of 12% and 13%, respectively. The syntheses diverge from ramentaceone (7-methyljuglone) and include a key Suzuki-Miyaura cross-coupling. Diospyrin, idospyrin, and several synthetic precursors exhibit potent and selective cytotoxicity to the murine myeloma NS-1 cell line over neonatal foreskin cells.
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