Total Synthesis of (-)-Voacinol and (-)-Voacandimine C.
Total Synthesis of (-)-Voacinol and (-)-Voacandimine C.
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全合成了(-)-Voacinol和(-)-Voacandimine C。
DOI:
10.1021/jacs.2c03057
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发表时间:
2022-05-25
影响因子:
15
通讯作者:
Movassaghi, Mohammad
中科院分区:
文献类型:
--
作者:
Flynn, Kristen M.;Myeong, In-Soo;Pinto, Taylor;Movassaghi, Mohammad
We describe the first total synthesis of complex aspidosperma alkaloids (–)-voacinol and (–)-voacandimine C via a late-stage C7-methylenation strategy inspired by a biogenetic hypothesis. We envisioned rapid access to these natural alkaloids from a common, symmetrical precursor assembled by methylenation of a D-ring-oxidized variant of the structurally related natural product (–)-deoxoapodine. Chemoselective N9-oxidation of a pentacyclic deoxoapodine precursor enabled the synthesis of the corresponding hexacyclic C8-aminonitrile. Stereocontrolled methylenation of a C8-enamine derivative of deoxoapodine, accessed by ionization of the C8-aminonitrile, afforded a symmetrical dodecacyclic bisaminonitrile as a versatile precursor to these bisindole alkaloids. Final-stage, biosynthesis-inspired, controlled reductive opening of the oxolane substructures of this dodecacyclic intermediate provided a unified approach to (–)-voacinol and (–)-voacandimine C, while direct reduction of the same intermediate afforded the structurally related (–)-methylenebisdeoxoapodine.
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影响因子:
15
作者:
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通讯作者:
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影响因子:
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作者:
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影响因子:
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通讯作者:
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15
作者:
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