Migrated lupane derivatives. Boron trifluoride etherate-catalyzed backbone rearrangement of 3.ALPHA.,4.ALPHA.- and 3.BETA.,4.BETA.-epoxy-D:A-friedo-18.BETA.,19.ALPHA.H-lupanes and solvent effects.
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概要
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Backbone rearrangements of 3α,4α- and 3β,4βepoxy-<I>D</I>:<I>A</I>-friedo-18β,19α<I>H</I>-lupanes catalyzed by boron trifluoride etherate gave 18β,19α<I>H</I>-lup-12-en-3-ols, lup-18-en-3-ols, and lup-19-en-3-ols, besides known <I>D</I>:<I>B</I>-friedo-18β,19α<I>H</I>-lup-5-en-3-ols and -5(10)-en-3-ols. <I>D</I>:<I>B</I>-Friedo-18β,19α<I>H</I>-lup-l(10)-en-3α-ol and 3β,10β-epoxy-<I>D</I>:<I>B</I>-friedo-18β,19α<I>H</I>-lupane were also obtained from α- and β-epoxides, respectively. Solvent effects on these reactions were examined.
- 公益社団法人 日本化学会の論文
著者
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Takahashi Takeyoshi
Department Of Applied Biological Science College Of Agriculture And Veterinary Medicine Nihon Univer
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Tsuyuki Takahiko
Department Of Chemistry College Of General Education University Of Tokyo
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Yokoyama Yasushi
Department Of Advanced Materials Chemistry Graduate School Of Engineering Yokohama National Universi
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Moriyama Yoshihiko
Institute of Chemistry, Kyoto Prefectual University of Medicine
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