Synthesis and biological evaluation of (-) and (+)-spiroleucettadine and analogues
Journal Title
Publication Type
Journal epub ahead of print
A second generation enantiospecific synthesis of spiroleucettadine is described. The original reported antibacterial activity was not observed when repeated on the synthetic samples, however, significant anti-proliferative activity was uncovered for both enantiomers of spiroleucettadine. Comparison of the optical rotational data and ORD-CD spectra of both enantiomers and the reported spectrum from the natural source has not provided a definitive answer regarding the absolute stereochemistry of naturally occurring spiroleucettadine. Efforts then focussed on alteration at the C-4 and C-5 position of the slightly more active (-)-spiroleucettadine. Ten analogues were synthesised, with three analogues ( 21 , 22 and 24 ) found to possess similar anti-proliferative profiles to spiroleucettadine ( 3 ) against the H522 lung cancer cell line (0.31 μM, 0.38 μM and 0.28 μM vs 0.28 μM, respectively).
Hypervalent iodine; Medicinal Chemistry; alkaloids; oxidative spirocyclization; total synthesis
WEHI Research Division(s)
Chemical Biology
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Creation Date: 2021-02-01 12:08:36
Last Modified: 2021-03-02 03:03:50
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