過渡金屬催化不同的烯炔類進行有機反應, 氧化加成, 環化作用及二聚體環化

Transition Metals Catalyzed Organic Transformations, Oxidative Cycloadditions, Cyclizations and Dimeric Cyclizations on Diverse Enynes

沙提斯(SATISH MADHAV GHORPADE)

指導教授 ： 劉瑞雄

國立清華大學/理學院/化學系/博士(2014年)

https://doi.org/10.6843/NTHU.2014.00264

摘要

簡介
本文介紹了利用金與銅的鹽類合成新型有機轉換化反應的發展。使用軟alkynophilic金屬使廣泛的各種各樣的現成的基質進行溫和的、非鏡像選擇性和高效轉換來合成生物學上重要的含氮雜環產物。為了更好地理解，本文分為四個章節。

第一章論述了cis-3-En-1-ynes的金催化氧化環化反應產生環戊烯酮衍生物。用於合成環戊烯酮衍生物的此反應使用了金錯合物和8-甲基喹啉氧化物作為催化劑基底。這類反應適用於範圍廣泛的苯環和非苯環衍生的起始物，從而得到各種茚酮和環戊烯酮衍生物。欲獲得這類的產物不能使用與diazocarbonyl試劑一同反應，因為金的碳烯化合物往往與碳氫鍵進行反應。
第二章討論1,4–烯炔類的金催化氧化環化反應被用來研究Wagner–Meerwein重排的γ效應。實驗和理論預測都證實了金的取代基中的γ位置可以導引抗 anti-β-取代基進行立體位向確定的1,2移位，而無視其固有特性。
第三章介紹了3,5-和3,6-dienynes金催化的反應與8-烷基喹啉氧化物產生氧化環高立體位向選擇性，這個過程涉及喹啉架構的催化活性。其反應機制包括α-羰基吡啶鎓內鹽(I)的中間產物與拘束的烯烴類一起產生的[3+2]-環加成反應。
第四章所介紹的研究目的是利用廉價的叔胺類化合物的銅催化氧化反應進行一步的合成複雜而重要的分子結構。N-hydroxyaminopropenes經由銅催化的含氧的氧化反應形成具有C2對稱並含氮和氧的官能化環己烷。

關鍵字

金催化反應 ； 銅催化反應 ； 氧化環化反應 ； 氧化二聚體環化反應 ； 金屬碳烯化合物

並列摘要

ABSTRACT
This dissertation describes development of new synthetic organic transformations by using gold and copper salts. The use of these soft alkynophilic metals enables mild, diastereoselective and efficient transformations of a variety of readily available substrates to wide range of synthetically useful and biologically important N, O containing heterocyclic and carbocyclic products. For better understanding the thesis is divided into four chapters.

The first chapter deals with the Gold-catalyzed oxidative cyclizations of cis-3-En-1-ynes to form cyclopentenone derivatives. The title reaction for synthesizing cyclopentenone derivatives utilizes a gold complex and 8-methylquinoline oxide as the catalyst system. The value of such reactions is reflected by their applicability to a broad range of benzene- and nonbenzene-derived substrates, thus giving various indanone and cyclopentenone derivatives, respectively. Such products are not attainable using diazocarbonyl reagents, as the gold carbenoids tend to react with C-H bonds.

The second chapter deals with the gold-catalyzed oxidative cyclizations of 1,4-enynes were used to study the γ-effect on the Wagner–Meerwein rearrangement. Both experimental and theoretical work disclose that a gold substituent in the γ-position can direct a stereospecific 1,2 shift of the anti-β-substituent regardless of its intrinsic properties.

The third chapter describes gold-catalyzed reactions of 3,5- and 3,6-dienynes with 8-alkyl- quinoline oxides results in an oxidative cycloaddition with high stereospecificity, this process involves a catalytic activation of a quinoline framework. The reaction mechanism involves the intermediacy of α-carbonyl pyridinium ylides (I) in a concerted [3+2]-cycloaddition with a tethered alkene.

The fourth chapter presents the work aim at one-step construction of complex and important molecular frameworks via Cu-catalyzed oxidations of cheap tertiary amines. Cu-catalyzed aerobic oxidations of N-hydroxyaminopropenes to form C2-symmetric N- and O-functionalized cyclohexanes.

並列關鍵字

Gold catalysis ； Copper catalysis ； Oxidative cyclisation ； Oxidative dimerisation ； Metal carbene

參考文獻

4. Zhang, L.; Sun, J.; Kozmin, S. A. Adv. Synth. Catal. 2006, 348, 2271.

5. Fu¨rstner, A.; Davies, P. W. Angew. Chem., Int. Ed. 2007, 46, 3410.

6. Gorin, D. J.; Toste, F. D. Nature 2007, 446, 395.

12. Organic Chemistry Morrison, R.T.; Boyd, R.N. pp. 473-478.

14. Xiao, J.; Li, X. Angew. Chem., Int. Ed. 2011, 50, 7226.