研究生: |
盧咸叡 Lu, Hsien-jui |
---|---|
論文名稱: |
一價銠金屬催化1,6-烯炔環化反應 : 以β-硼酯取代不飽和酯起始之串聯反應 Rhodium(I)-Catalyzed Cascade Cyclization of 1,6-Enynes : A Cascade Reaction Initiated by Addition of β-Substituted Unsaturated Ester Pinacolborane |
指導教授: |
吳學亮
Wu, Hsyueh-Liang |
口試委員: |
吳學亮
Wu, Hsyueh-Liang 林民生 Hayashi, Tamio 謝仁傑 Hsieh, Jen-Chieh |
口試日期: | 2023/07/13 |
學位類別: |
碩士 Master |
系所名稱: |
化學系 Department of Chemistry |
論文出版年: | 2023 |
畢業學年度: | 111 |
語文別: | 中文 |
論文頁數: | 280 |
中文關鍵詞: | 一價銠金屬催化串聯反應 、不飽和酯氫化 、分子內氫化銠轉移 |
英文關鍵詞: | Rhodium(I)-catalyzed cascade reaction, α,β-Unsaturated ester hydrogenation, intramolecular rhodium hydride migration |
研究方法: | 實驗設計法 |
DOI URL: | http://doi.org/10.6345/NTNU202301543 |
論文種類: | 學術論文 |
相關次數: | 點閱:73 下載:1 |
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本篇論文探討利用具有1,6-烯炔起始物進行銠金屬催化串聯反應。從一系列的反應設計中,發現此串聯反應能藉由β-氫消去反應所產生的氫化銠,進而將α,β-不飽和酯上的雙鍵進行氫化。此串聯反應是利用具有1,6-烯炔起始物1a以及β位為硼酯取代的α,β-不飽和酯作為親核性試劑2a進行反應。銠金屬經由與親核性試劑2a進行金屬交換反應後,和起始物上反應性較好的三鍵進行選擇性1,2-加成後,進行分子內環化反應形成烷基銠中間體,經由β-氫消去反應產生氫化銠,而經由分子內轉移使氫化銠選擇性加成至α,β-不飽和酯上的雙鍵後進行質子化反應,最終產生雙鍵被分子內產生的氫化銠氫化成單鍵的產物。
This thesis describes a rhodium catalyzed cascade reaction of an 1,6-enyne strating material. Through a series designed experiments, a reaction involving hydrogenation of α,β-unsaturated ester via rhodium hydride, producedd by β-hydride elimination. This is the first example of α,β-unsaturated ester hydrogenation utilizing intramolecular producedd rhodium hydride. This cascade reaction utilized a starting material with 1,6-enyne structure 1a and a β-boronic acid acid pinacol ester (Bpin) substituded α,β-unsaturated ester as nucleophile 2a, the reaction was initiated by rhodium transmetalation with nucleophile 2a, then selective 1,2-addition with the more reactive triple bond on starting material, after intramolecular cyclization and β-hydride elimination, rhodium hydride will migrate from the newly formed olefin to the olefin on the nucleophile, after which hydrogenation takes place, foming the desired product 3aa.
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