Sun C, Inokuma T, Tsuji D, Yamaoka Y, Akagi R, Yamada KI. Total synthesis of 1,4a-di-
epi-ent-pancratistatin, exemplifying a stereodivergent approach to pancratistatin isomers.
Chem Commun (Camb) 2024;
60:6757-6760. [PMID:
38864269 DOI:
10.1039/d4cc02199a]
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Abstract
The total synthesis of 1,4a-di-epi-ent-pancratistatin, a novel stereoisomer of the anti-tumor Amaryllidaceae alkaloid pancratistatin, was achieved in 14 steps starting from D-mannitol. The construction of the pancratistatin skeleton involved conjugate addition of organocuprate to a nitrosoolefin, which was generated in situ from inosose oxime. This was followed by stereoselective reduction of the oxime to an amine and site-selective formylation. Biological evaluations revealed that the newly synthesized compounds exhibit cytotoxicity toward cancer cells and significant ferroptosis inhibitory activity. These compounds constitute a promising small-molecule library for the development of potent bioactive agents.
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