研究生: |
陳安正 Ann-Cheng Chen |
---|---|
論文名稱: |
雜芳香環駢蓓菉苓類化合物之合成與光化學重排反應 Syntheses and Photorearrangements of Heteroarene-fused Barrelenes |
指導教授: |
廖俊臣
Chun-Chen Liao |
口試委員: | |
學位類別: |
博士 Doctor |
系所名稱: |
理學院 - 化學系 Department of Chemistry |
論文出版年: | 2005 |
畢業學年度: | 93 |
語文別: | 中文 |
論文頁數: | 198 |
中文關鍵詞: | 有機光化學 、蓓菉苓 、掩飾鄰苯□ 、二-pi-甲烷重排 、光化學重排反應 、雜芳香環化合物 |
外文關鍵詞: | Organic Photochemistry, Barrelene, di-pi-methane rearrangement, Photorearrangement, Heteroaromatic compounds |
相關次數: | 點閱:3 下載:0 |
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本論文係探討一系列雜芳香環駢蓓菉苓(桶烯)類化合物之合成與光化學重排反應。
我們利用多種各具不同取代基的雙環[2.2.2]辛-5,7-雙烯-2,3-雙酮 (15, 15*, 20, 25, 29)與1,2-二胺基-1,2-二氰基乙烯 (1,2-二胺基丁烯二□)、1,2-二胺基苯以及2,3-二胺基□行縮合反應得到一系列的□口井駢蓓菉苓(1, 1*, 4, 6, 8)、奎喏□駢蓓菉苓衍生物(2, 2*, 5, 7, 9)或苯駢奎喏□駢蓓菉苓(3, 10);除了3與10兩個化合物產率較低(約45%),其他化合物都有相當良好的產率(80 % - 98 %)。
這些雜芳香環駢蓓菉苓不論在直接以紫外光照光的條件下或是在具有光敏劑存在的條件下都會進行二-□-甲烷重排(DPM)或氮-二-□-甲烷重排(ADPM),而反應途徑的選擇性主要由蓓菉苓上的芳香雜環決定,亦同時受到蓓菉苓橋頭位置的取代基或是烯基上的取代基所影響。另一方面,反應橋聯的選擇性(DPM vs. ADPM)我們亦可以藉由其橋聯當時三重態的能量加以解釋。
我們亦嚐試在不同溶劑或不同波長下對蓓菉苓的衍生物進行反應橋聯的實驗,發現溶劑效應在一系列的反應中並不會造成明顯的影響。
產物結構大致上以氫核磁共振光譜與碳核磁共振配合高解析質譜(對照起使物與產物)進行分析,也都能夠確實的了解產物的結構。
This thesis describes the synthesis and a detailed study on the photorearrangements of several heteroarene-fused barrelenes.
A series of pyrazinobarrelenes (1, 1*, 4, 6, 8), quinoxalinobarrelenes (2, 2*, 5, 7, 9) and benzoquinoxalinobarrelenes (3, 10) were prepared in good to excellent yields (45 - 98% yields) from the condensation of bicyclo[2.2.2]octa-5,7-diene-2,3-diones (15, 15*, 20, 25, 29) with 1,2-diamino-1,2-dicyanoethylene (diaminomaleonitrile), 1,2-diamiobenzene, 2,3-diaminonaphthalene.
These heteroarene-fused barrelenes underwent two kinds of rearrangement reactions namely, di-□-methane (DPM) or aza-di-□-methane (ADPM) rearrangement upon direct irradiation with UV light or under sensitized condition. Reaction pathway depends upon several factors including the nature of the heteroarrene moiety, substituents (methyl group, n-propyl group) on the bridge-head and substituents (methoxy carbonyl group) on the double bond of the barrelenes. Triplet state energy of bridging moiety can be used in explanation of the reaction mode.
Solvent effect on the mode of the reaction were also studied but gave no profound effect on the reaction pathway selectivities.
The structures of all the new compounds were determined mainly by 1H NMR, 13C NMR and HRMS spectroscopic methods.
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