| 研究生: |
林家輝 Lin, Chia-Hui |
|---|---|
| 論文名稱: |
indole化合物的氧化性自由基反應 Oxidative Free Radical Reaction of Indoles |
| 指導教授: |
莊治平
CHuang, Che-Ping |
| 學位類別: |
碩士 Master |
| 系所名稱: |
理學院 - 化學系 Department of Chemistry |
| 論文出版年: | 2003 |
| 畢業學年度: | 91 |
| 語文別: | 中文 |
| 論文頁數: | 82 |
| 中文關鍵詞: | 氧化性自由基反應 、丙二酸二甲酯 、醋酸錳 、氧化反應 |
| 外文關鍵詞: | dimethyl malonate, indole, oxidative free radical reaction, 2-alkylidene 3-indole, manganese(III) acetate |
| 相關次數: | 點閱:103 下載:2 |
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利用醋酸錳(III)金屬離子來產生丙二酸二甲酯B親電性自由基,而加成到indole化合物A上,再經由氧化而產生化合物C。這反應是一個新穎的反應,是一般離子性有機合成上較難去合成的一個化合物(產率只有12﹪~ 44﹪)。而我們可以利用自由基的方法,一步合成高產率化合物C.化合物C則是合成生物鹼aristotelia alkaloids D、pyano[3,2-b]indole E、carbazole alkaloids F重要的中間體。
另外。我們在自由基的氧化反應中,也發現在indole苯環上有推電子基時G,會與醋酸錳(III)產生氧化反應,得到反式加成的產物H、I、J。
我們也進行苯基indole化合物K的氧化反應。在研究過程中,也發現了化合物L,且產率可高達75-95%。
由氧化反應結果顯示,indole化合物經由醋酸錳(III)氧化是取決於indole化合物上的取代基。
In the presence of manganese(III) acetate, the reaction of indole compounds A with dimethyl malonate B produces 2-alkylidene 3-indole derivatives C.
Previous syntheses of 2-alkylidene 3-indole derivatives C utilized the aldol reaction of 3-oxindoles. However, this approach is of limited synthetic utility. For example, 2-alkylidene 3-indole derivatives C were obtained with good stereoselectivity but low yields (12-44% yield).
With our novel method C can be obtained in good yields.2-Alkylidene3-indole derivatives C have been recognized as powerful synthetic precursors for the construction of Aristotelia alkaloids D, pyrano[3,2-b]indole E and δ-carbolines F.
We found that the oxidative free radical reaction of indole G bearing an electron donating group gave trans-hydroxy-indole H, I, and J.
The reaction of phenyl substituted indole K with manganese(III) afforded L in75-95%.
The product distribution of this manganese(III) oxidation of indoles is effected by the substituents of indoles.
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