| 研究生: |
陳裕君 Chen, Yu-jyun |
|---|---|
| 論文名稱: |
苯并[b]芴及異噁唑化合物的合成 The synthesis of benzo[b]fluorene and isoxazole |
| 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: | 2009 |
| 畢業學年度: | 97 |
| 語文別: | 中文 |
| 論文頁數: | 82 |
| 中文關鍵詞: | 異噁唑化合物 、苯并[b]芴 、醋酸錳(Ⅲ) 、自由基 |
| 外文關鍵詞: | free radical, isoxazole, benzo[b]fluorene, manganese(III) |
| 相關次數: | 點閱:76 下載:1 |
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碳-碳鍵的合成可藉由離子性反應或自由基反應來達成,以金屬鹽類進行氧化性自由基反應在有機合成領域已受到相當注目,而金屬鹽類中以醋酸錳(Ⅲ)和硝酸鈰銨(Ⅳ)最有效率,在本篇論文中,碳自由基可經由醋酸錳(Ⅲ)氧化氰基乙酸乙酯或丙二酸二甲酯有效產生,並與2-苯基-1,4-萘醌化合物進行分子間的自由基加成反應形成苯并[b]芴化合物。
藉由吡啶銨鹽脫去一質子先得到pyridinium ylide 後,可有效進行共軛加成至α,β-不飽和羰基化合物,此類由α,β-不飽和羰基化
合物與吡啶銨鹽來合成異噁唑化合物的方法已有相關發展;另外,經由α,β-不飽和羰基化合物與硝基化合物間的離子性反應也可合成異噁唑化合物。
Formation of C-C bond can be achieved either by ionic reactions or radical reactions. Oxidative free radical reaction mediated by metal salts has attracted attention in organic synthesis. Manganese(III) acetate and cerium(IV) ammonium nitrate have been the most efficient among these metal salts. In this thesis, carbon radical generated by oxidation of ethyl cyanoacetate or dimethyl malonate with the manganese(III) acetate undergo addition to 2-aryl-1,4-naphthaquinones effectively and benzo[b]fluorene was produced.
Pyridinium ylide can be generated by the deprotonation of pyridinium salt and it can undergo conjugate addition to
α,β-unsaturated carbonyl compounds effectively. A new method to the synthesis of isoxazole from readily available α,β-unsaturated carbonyl compounds and pyridinium salts has been developed. This isoxazole can
also be synthesized by a similar ionic reaction between α,β-unsaturated carbonyl compounds and nitro compounds.
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