研究生: |
許競太 Ching-Tai Hsu |
---|---|
論文名稱: |
銠金屬(I)結合掌性雙環[2.2.1]雙烯配體催化四芳香基硼鈉鹽對β,β-雙取代 α,β-不飽和酮類化合物進行不對稱1,4-加成反應 Rhodium/Diene-Catalyzed 1,4-Addition Reaction to β, β-Disubstituted α,β -Unsaturated Ketones: Enantioselective Construction of Chiral Quaternary Carbon Stereocenters |
指導教授: |
吳學亮
Wu, Hsyueh-Liang |
學位類別: |
碩士 Master |
系所名稱: |
化學系 Department of Chemistry |
論文出版年: | 2014 |
畢業學年度: | 102 |
語文別: | 中文 |
論文頁數: | 84 |
中文關鍵詞: | 1,4-加成反應 |
英文關鍵詞: | 1,4-addition reaction |
論文種類: | 學術論文 |
相關次數: | 點閱:150 下載:0 |
分享至: |
查詢本校圖書館目錄 查詢臺灣博碩士論文知識加值系統 勘誤回報 |
本文利用過渡金屬銠(I)金屬和掌性雙烯配基 (L2B) 當作催化劑,催化四芳香基硼鈉鹽48,在2-甲基四氫呋喃溶劑中,以甲醇當作添加劑,於80 °C環境下,對β,β-雙取代α,β-不飽和環狀酮類化合物進行不對稱1,4-加成反應,建構一系列具有掌性的四級碳中心的化合物。以3或是1 mol%的銠金屬催化可以得到3到83%的產率,87到>99.5%鏡像超越值的加成產物49。
接著,將具有高產率及高選擇性之產物49a當作起始物,進一步應用於合成出具掌性之內醯胺(55a、55b)及內酯(56a、56b)化合物。
In this thesis, a practical synthesis of optically active ketones 49 bearing a β-quaternary chiral center from asymmertric conjugated reaction of sodium tetraarylborates 48 to β,β-disubstituted α,β-unsaturated ketones is described. In the presence of 1mol% or 3mol% of rhodium catalyst in situ generated from the reaction of [RhCl(C2H4)2]2 and chiral diene ligand L2B, the asymmetric conjugate addition reaction, conducted at 80 °C in 2-methyltetrahydrofuran using MeOH as an additive, of a variety of sodium tetraarylborates 48 toβ,β-disubstituted α,β-unsaturated ketones furnished adducts 49 in up to 83% yield and up to >99.5% ee.
For the synthetic application, enantio-enriched compound 49a was transformed into chiral lactams (55a and 55b) and lactones (56a and 56b) respectively via Schmidt reaction and Baeyer Villiger oxidation reaction.
1. a. Christoffers, J.; Mann, A. Angew. Chem., Int. Ed. 2001, 40, 4591.
b. Denissova, I.; Barriault, L. Tetrahedron 2003, 59, 10105.
c. Li, X. L.; Zhao, B. X.; Huang, X. J.; Zhang, D. M.; Jiang, R. W.; Li, Y. J.; Jian, Y.
Q.; Wang, Y.; Li, Y. L.; Ye, W. C. Org. Lett. 2014, 16, 224.
d. Hong, Y. C.; Gandeepan, P.; Mannanthan, S.; Lee, W. T.; Cheng, C. H. Org. Lett. 2014.
2. d'Augustin, M.; Palais, L.; Alexakis, A. Angew. Chem., Int. Ed. 2005, 44, 1376.
3. Hawner, C.; Li, K.; Cirriez, V.; Alexakis, A. Angew. Chem., Int. Ed. 2008, 47, 8211.
4. Martin, D.; Kehrli, S.; d'Augustin, M.; Clavier, H.; Mauduit, M.; Alexakis, A. J. Am. Chem. Soc. 2006, 128, 8416.
5. Wu, J.; Mampreian, D. M.; Hoveyda, A. H. J. Am. Chem. Soc. 2005, 127, 4584.
6. Fillion, E.; Wilsily, A. J. Am. Chem. Soc. 2006, 128, 2774
7. Shintani, R.; Tsutsumi, Y.; Nagaosa, M.; Nishimura, T.; Hayashi, T. J. Am. Chem. Soc. 2009, 131, 13588.
8. Shintani, R.; Takeda, M.; Nishimura, T.; Hayashi, T. Angew. Chem., Int. Ed. 2010, 49, 3969.
9. Shintani, R.; Hayashi, T. Org. Lett. 2011, 13, 350.
10. Kikushima, K.; Holder, J. C.; Gatti, M.; Stoltz, B. M. J. Am. Chem. Soc. 2011, 133, 6902.
11. Hayashi, T.; Ueyama, K.; Tokunaga, N.; Yoshida, K. J. Am. Chem. Soc. 2003, 125, 11508.
12. Tokunaga, N.; Otomaru, Y.; Okamoto, K.; Ueyama, K.; Shintani, R.; Hayashi, T. J. Am. Chem. Soc. 2004, 126, 13584.
13. Defieber, C.; Paquin, J. F.; Serna, S.; Carreira, E. M. Org. Lett. 2004, 6, 3873.
14. Wang, Z. Q.; Feng, C. G.; Zhang, S. S.; Xu, M. H.; Lin, G. Q. Angew. Chem., Int. Ed. 2010, 49, 5780.
15. Liu, C. C.; Janmanchi, D.; Chen, C. C.; Wu, H. L. Eur. J. Org. Chem. 2012, 2503.
16. Chung, Y. C.; Janmanchi, D.; Wu, H. L. Org. Lett. 2012, 14, 2766.
17. Chavan, S. P.; Lasonkar, P. B. Tetrahedron:Asymmetry 2012 23 1496.