Electrochemical Synthetic Application of Bisflavanones
Autor: | Tzu-Sheng-Chuang, 莊慈生 |
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Rok vydání: | 2005 |
Druh dokumentu: | 學位論文 ; thesis |
Popis: | 94 Biflavonoids usually exist in natural plants. They were found to have some activities in hepatitis B virus, anti-cancer,anti-spasm, improving immunity. 6-Methoxyflavone were synthesized by Baker- Venkataraman Rearrangement. We tried to invesgate the factors which affect the electroorganic dimerization of 6-methoxyflavone was easily reduced by using electrochemical method to give two hydrodimers of 6,6’-dimethoxy-2,2’-biflavanone (racemate) and 6,6’-dimethoxy-2,2’- biflavanone (meso) and one reductive product of 6-methoxyfiavaanone. Their yields were dependent on the nature of electrodes, the kinds of supporting electrolytes and the reaction temperature. They were found to afford higher yields of 6,6’-dimethoxy-2,2’-biflavanone (racemate), 6,6’-dimethoxy-2,2’-biflavanone (meso) and 6-methoxyfiavaanone.(24.9﹪, 22.9﹪,and38.5﹪,respectively,) in the reaction condition of Pd(-)/C(+)-0.1MH2SO4/MeOH-20F/mol at 0℃ |
Databáze: | Networked Digital Library of Theses & Dissertations |
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