2013 Fiscal Year Final Research Report
Total synthesis of natural products through synthetic strategy based on enovative catalysis
| Project/Area Number |
23390004
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Chemical pharmacy
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| Research Institution | Kyoto University |
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Principal Investigator |
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 複素環化学 / 全合成 / 不斉合成 / 環化反応 / アポトーシス / 多剤耐性抗結核作用 |
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| Research Abstract |
In this research project, we focused on the total synthesis of perophoramidine and caprazamycin B. Concerning perophoramidine, we have developed the SmI2-mediated cyclization of unsaturated lactams or amidines bearing a carbodiimide moiety as well as the dearomatizing conjugate addition to quinoline derivatives including a lactam or amidine, to construct a spirocyclic quaternary carbon center and a five-membered amidine ring. By using these original synthetic tools, total synthesis of dehaloperophoramidine was achieved. For the caprazamycin synthesis, we explored the organocatalyzed asymmetric syntheses of fatty acid side chains and hydroxyamino acids bearing a uridine. Furthermore, diazepanone rings were also synthesized by using an Au- or Pt-catalyzed hydroamidation or Mitsunobu reaction. As a result, we succeed in the introduction of the fatty acid side chain into a model compound bearing a diazepanone ring as well as the transformation into the protected caprazol derivative.
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