研究生: |
吳彥勳 WU, Yen-Hsung |
---|---|
論文名稱: |
一價銠金屬催化具鏡像選擇性串聯環化:以配體效應控制銠金屬1,2-重排合成掌性2-茚酮 Rhodium(I)-Catalyzed Enantioselective Tandem Cyclization: Synthesis of Chiral 2-Indanones via Rh 1,2-Shift Controlled by Ligand Effects |
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 陳建添 Chen, Chien-Tien |
口試日期: | 2023/07/28 |
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: | 199 |
中文關鍵詞: | 一價銠金屬催化 、不對稱串聯環化反應 、軸掌性雙膦配體 、鏡像選擇性 、掌性2-茚酮 、芳基硼酯 、反丁烯二酸二酯 |
英文關鍵詞: | rhodium(I)-catalyzed, asymmetric tandem cyclization, axially chiral bisphosphine ligand, enantioselective, arylboronic esters, fumarate diesters |
研究方法: | 實驗設計法 |
DOI URL: | http://doi.org/10.6345/NTNU202301396 |
論文種類: | 學術論文 |
相關次數: | 點閱:107 下載:2 |
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本論文敘述利用一價銠金屬與軸掌性雙膦配體(S)-BINAP (L1) 所形成之催化劑,催化不同的芳基硼酯34與反丁烯二酸二酯化合物32進行不對稱的串聯環化反應,獲得一系列具有2-茚酮(2-indanone)結構之掌性化合物35,共有19個例子,產率最高達93%,鏡像選擇性則是最高達89% ee,且改使用順丁烯二酸二甲酯(32b’)進行反應時,結果與反丁烯二酸二甲酯(32b)相同,並透過推測之反應機構證明其可能原因。
在催化循環中的關鍵步驟為1,2-銠金屬轉移(1,2-rhodium shift)反應,透過氘標記反應實驗證明得到的產物35是經由1,2-銠金屬轉移反應。
This thesis describes an enantioselective tandem cyclization of fumarate diesters 32 with various arylboronic esters 34. In the presence of 5.0 mol% of Rh(I)-catalyst in situ generated from the [RhCl(cod)]2 and the axially chiral bisphosphine ligand (S)-BINAP ((S)-L1), the desired chiral 2-indanone derivatives 35 are obtained in up to 93% yield and 89% ee demonstiated in 19 examples. When substituting dimethyl maleate with dimethyl fumarate, we yielded the comparable result to the fumarate. And the possible reason was substantiated through the inferred reaction mechanism. Furthermore, the key step of catalytic cycle is 1,2-rhodium shift, deuterium labeling experiments were conducted to provide a solid evidence of 1,2-rhodium shift, leading to the formation of 35.
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