4.8 Article

Total Synthesis of (-)-Himalensine A

Journal

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 139, Issue 49, Pages 17755-17758

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/jacs.7b10956

Keywords

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Funding

  1. Syngenta
  2. EPSRC Centre for Doctoral Training in Synthesis for Biology and Medicine [EP/L015838/1]
  3. AstraZeneca
  4. Diamond Light Source
  5. Defence Science and Technology Laboratory
  6. Evotec
  7. GlaxoSmithKline
  8. Janssen
  9. Novartis
  10. Pfizer
  11. Takeda
  12. UCB
  13. Vertex
  14. European Union's Horizon research and innovation programme under Marie Sklodowska-Curie grant [752491, 676108]
  15. EPSRC
  16. EPSRC [EP/G007802/1] Funding Source: UKRI
  17. Engineering and Physical Sciences Research Council [1515061, EP/G007802/1] Funding Source: researchfish
  18. Marie Curie Actions (MSCA) [752491] Funding Source: Marie Curie Actions (MSCA)

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The first enantioselective synthesis of (-)-himalensine A has been achieved in 22 steps. The synthesis was enabled by a novel catalytic, enantioselective prototropic shift/furan Diels-Alder (IMDAF) cascade to construct the ACD tricyclic core. A reductive radical cyclization cascade was utilized to build the B ring, and end-game manipulations featuring a molecular oxygen mediated gamma-CH oxidation, a Stetter cyclization to access the pendant cyclopentenone, and a highly chemoselective lactam reduction delivered the natural product target.

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