Arnold RE, Saska J, Mesquita-Ribeiro R, Dajas-Bailador F, Taylor L, Lewis W, Argent S, Shao H, Houk KN, Denton RM. Total synthesis, biological evaluation and biosynthetic re-evaluation of
Illicium-derived neolignans.
Chem Sci 2024;
15:11783-11793. [PMID:
39092111 PMCID:
PMC11290413 DOI:
10.1039/d4sc03232b]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2024] [Accepted: 06/13/2024] [Indexed: 08/04/2024] Open
Abstract
We report the first total syntheses of simonsol F (3), simonsinol (5), fargenin (4), and macranthol (6) in addition to syntheses of simonsol C (2), simonsol G (1), and honokiol (14). The syntheses are based upon a phosphonium ylide-mediated cascade reaction and upon natural product isomerization reactions which proceed through Cope rearrangements of putative biosynthetic dienone intermediates. As a corollary of the natural product isomerization reactions, we propose an alternative biosynthesis of honokiol (14), simonsinol (5), and macranthol (6) which unites the natural products in this family under a single common precursor, chavicol (7). Finally, we demonstrate that simonsol C (2) and simonsol F (3) promote axonal growth in primary mouse cortical neurons.
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