研究生: |
葉湘婷 Yeh, Hsiang-Ting |
---|---|
論文名稱: |
有機催化不對稱 Oxa-麥可/麥可環化加成連鎖反應:多取代苯併二氫吡喃衍生物的製備 Organocatalytic Asymmetric Cascade Oxa-Michael/Michael Cyclization Sequence: Synthesis of Highly Substituted Chromane Derivatives |
指導教授: |
陳焜銘
Chen, Kwun-Min |
口試委員: |
林文偉
Lin, Wen-Wei 劉維民 Liu, Wei-Min 陳焜銘 Chen, Kwun-Min |
口試日期: | 2022/01/21 |
學位類別: |
碩士 Master |
系所名稱: |
化學系 Department of Chemistry |
論文出版年: | 2022 |
畢業學年度: | 110 |
語文別: | 中文 |
論文頁數: | 120 |
中文關鍵詞: | 有機不對稱催化合成 、方醯胺 、連鎖 oxa-麥可/麥可反應 、鹵化四級碳 、色烷 |
英文關鍵詞: | Asymmetric organocatalytic synthesis, squaramide, cascade oxa-Michael/Michael reaction, Halogenated quaternary carbon, chromane |
研究方法: | 實驗設計法 |
DOI URL: | http://doi.org/10.6345/NTNU202200810 |
論文種類: | 學術論文 |
相關次數: | 點閱:112 下載:8 |
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單一操作,有機不對稱催化連鎖反應,已成為強而有力的合成方法,可構建 多個碳-碳鍵和化學立體中心。此類型反應對不對稱催化領域發展有很大進步, 大多數反應需要金屬催化劑或嚴格的反應條件。在有機合成中,親核試劑添加至 溴基硝基烯烴為重要的麥可加成反應,因為它們具有多重反應性和產生具有有價 值的分子架構。
在此研究中,我們發展了新穎合成方法,以雙成份兩步驟合成含有鹵化四級 碳立體中心的色烷衍生物,以雙官能基之方醯胺不對稱催化劑,經由有機不對稱 催化 oxa-麥可/麥可環化連鎖反應,獲得了預期的產物,其具有良好的化學產率 (22 -89 %)和鏡像超越值(31-97 % ee)。
Organocatalytic asymmetric cascade reactions have become a powerful synthetic paradigm for the construction of multiple carbon–carbon and stereogenic centers in a single operation. Although the catalytic asymmetric reactions were well developed, most of them required metal catalysts or the harsh reaction condition. One of the important Michael addition reactions is the addition of nucleophiles to bromonitroalkene due to their multiple reactivities and the valuable synthetic building blocks that are created.
In this research, we reported a new method for the two-component, two-step synthesis of chromane derivatives containing halogenated quaternary carbon stereocenter via an organocatalytic asymmetric cascade oxa-Michael/Michael cyclization sequence using a bifunctional squaramide catalyst. The desired products were obtained in 22 -89% yield and 31-91% ee.
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