| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2010: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2009: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2008: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Research Abstract |
Lewis acid catalyzed asymmetric cycloaddition reactions of cyclic carbonyl ylides generated from diazo carbonyl compounds were found to proceed not only by a normal electron demand type but also by an inverse electron demand type such as in the reaction with vinyl ethers and N-methylindoles with high levels of asymmetric induction. Thus a wide scope procedure for asymmetric syntheses of oxygen-bridged polycyclic compounds has been developed. With regard to a generality of diazo carbonyl substrates, the procedure could be applied for not only diazo compounds containing a benzene ring but also acyclic diazo diketones and the substrates containing a pyrrolidine ring. For the synthetic application, the synthesis of (+)-Tashiromine has been achieved.
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