研究生: |
邱澔瑜 Chiou, Hau-Yu |
---|---|
論文名稱: |
有機不對稱連鎖反應:以1,3-共軛烯炔與烯胺酮衍生物進行Michael/oxa-Michael加成反應建立四氫-4H-苯併吡喃架構 Organocascade Michael/oxa-Michael addition to construct tetrahydro-4H-chromene skeletons of 1,3-enyne with 1,3-cyclohexane-derived enaminones |
指導教授: |
陳焜銘
Chen, Kwun-Min |
學位類別: |
碩士 Master |
系所名稱: |
化學系 Department of Chemistry |
論文出版年: | 2017 |
畢業學年度: | 105 |
語文別: | 中文 |
論文頁數: | 86 |
中文關鍵詞: | 有機連鎖反應 、[3+3]合環反應 、1,3-共軛烯炔 |
英文關鍵詞: | Organocascaed, [3+3]-cycloaddtion, 1,3-enyne |
DOI URL: | https://doi.org/10.6345/NTNU202202395 |
論文種類: | 學術論文 |
相關次數: | 點閱:180 下載:0 |
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以有機催化劑進行有機不對稱連鎖反應進行,建構高鏡像選擇性之四氫-4H-苯並吡喃架構之產物。使用1,3-硝基共軛烯炔及烯胺酮,以氯仿為溶劑並利用20%之奎寧-硫尿素衍生之雙關能基催化劑,透過催化劑上三級胺及硫尿素之氫鍵催化,於0 oC,下進行兩分子間[3+3]合環反應,經由Michael/丙二烯生成/oxa-Micheal之過程得到四氫-4H-苯並吡喃架構為主架構之產物,最高可達48%產率,以及不錯的鏡像選擇性(up to >99%)。
The method is to construct high enatioseletivity of fourhydro-4H-chromene scaffold via bifunctional organocatalyst. The organocascade reaction is carried out between 1,3-nitro enynes and enaminones to afford tetrahydro-4H-chromene structures in CHCl3 through hydron-bonding interaction under 0 degree. The reaction proceeds through sequential conjugate Michael addition/allene formation/intramolecular oxa-Michael addition in medium yield (up to 48% yield) and excellent stereoselectivites (up to >99%).
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