研究生: |
黃筱菁 |
---|---|
論文名稱: |
共軛双烯與環氧、胺、炔的分子內環化反應 |
指導教授: | 葉名倉 |
學位類別: |
碩士 Master |
系所名稱: |
化學系 Department of Chemistry |
論文出版年: | 2007 |
畢業學年度: | 95 |
語文別: | 中文 |
論文頁數: | 131 |
中文關鍵詞: | 環氧 、胺 、炔 、環化 |
論文種類: | 學術論文 |
相關次數: | 點閱:249 下載:0 |
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摘要
本論文共分成三部分:
利用(η5-2,4-己二烯)三羰鐵陽離子錯鹽與帶有氰基之鋅銅試劑進行親核性加成反應,以氧化劑將三羰鐵錯合物去錯合後將氰基轉換為環氧基,藉由環氧基易開環的特性,利用路易士酸BF3‧OEt2催化環氧雙烯衍生物,可有效率地進行分子內環化反應,得到聯結雙環的環化產物。
利用(η5-1,3-環己雙烯)三羰鐵陽離子錯鹽以及(η5-1,3-環庚雙烯)三羰鐵陽離子錯鹽與異丁腈鋰進行親核性反應,經氧化劑去錯合後,得到C-5位置帶有雙甲基之1,3-環形雙烯氰化合物,並將氰基轉換為苯磺醯胺化合物,利用金陽離子催化帶雙甲基的共軛雙烯苯磺醯胺化合物進行分子內氫胺化反應,得到吲哚衍生物。
利用烯酮碘化物與帶有芳香族的炔基之鋅銅試劑進行親核性加成反應,再將酮基轉換成矽烯醇基,利用二氯化鉑催化帶矽烯醇基之1,3-環己二烯炔進行分子內環化反應,可得架橋雙環[4.2.2]的環化產物。
Abstract
Addition of cyano-funtionalized zinc-copper reagents to (η5-hexa- 2,4- diene)Fe(CO)3 cation followed by decomplexation with cerium ammonium nitrate (CAN) proceduced the C-5 cyano-funtionalized 2,4-dienes. Transformation of the cyano group using trimethylsulfonium iodide and base give epoxides. The intramolecular cyclization reaction of diene onto epoxides is catalyzed by 0.5 mol % boron trifluoride diethyl etherate to give heterobicyclic products.
Intramolecular hydroamination of 1,3-diene with benzenesulfonamide is catalyzed by Gold(I) to give the allylamine compounds in excellent diastereoselectivity and yields. The allylic amine products are important precursors in organic synthesis and are encountered in many natural products.
Platinum (II) chloride catalyzed intramolecular cyclizations of silyl enol ethers onto alkynes furnished bridged bicyclo[4,2,2] compounds. Starting substrate with an electron- withdrawing group at the benzene ring failed to give any cyclized products.
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