| 研究生: |
劉駿威 Jun-Wei Liu |
|---|---|
| 論文名稱: |
含雙呋喃天然物Squamocin-K之全合成研究 Total Synthesis of Bis-THF Containing Natural Product Squamocin-K |
| 指導教授: |
侯敦仁
Duen-Ren Hou |
| 口試委員: | |
| 學位類別: |
碩士 Master |
| 系所名稱: |
理學院 - 化學學系 Department of Chemistry |
| 畢業學年度: | 100 |
| 語文別: | 中文 |
| 論文頁數: | 139 |
| 中文關鍵詞: | 番荔枝科 、亞甲基繫繩 、置換反應 |
| 外文關鍵詞: | annonaceous acetogenins, Squamocin-K, CM |
| 相關次數: | 點閱:12 下載:0 |
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本篇論文利用掌性雙烯雙醇化合物1當作起始物合成番荔枝科乙醯化合物(annonaceous acetogenins)中含有相鄰兩個四氫呋喃(adjacent bis-tetrahydrofurans)中心結構的天然物的差向異構物(14S,21S)-bis-epi-Squamocin-K (18),藉此發展具有相鄰兩個四氫呋喃的番荔枝科化合物之合成方法。本篇利用亞甲基繫繩以及環閉合
置換反應建構其中心結構,之後利用交叉置換反應建構兩端的長碳鏈結構,接著使用環內酯15a做為親核試劑,反應得到關鍵產物。最後轉換官能基得到最終產物天然物的差向異構物(14S,21S)-bis-epi-Squamocin-K (18)。
To develop a new and efficient synthetic methodology for annonaceous acetogenins, a large family of natural products containing adjacent bis-tetrahydrofurans as the core structure, we
chose bis-epimer (14S,21S)-bis-epi-Squamocin-K (18) as our target molecules. The adjacent bis-tetrahydrofurans cores was constructed by using chiral dienediol 1 as the starting material. Methylene acetal was used as the linker to connect dienediol 1, and then ring-closing-metathesis reaction was applied to provide the precursor of the adjacent bis-tetrahydrofurans structure. The cross-metathesis reaction was used to extend the carbon skeleton. The lactone 15a was used as nucleophile and the total synthesis of 14S,21S-bis-epi-Squamocin-K (18) was achieved.
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