| Budget Amount *help |
¥27,560,000 (Direct Cost: ¥21,200,000、Indirect Cost: ¥6,360,000)
Fiscal Year 2011: ¥6,630,000 (Direct Cost: ¥5,100,000、Indirect Cost: ¥1,530,000)
Fiscal Year 2010: ¥10,010,000 (Direct Cost: ¥7,700,000、Indirect Cost: ¥2,310,000)
Fiscal Year 2009: ¥10,920,000 (Direct Cost: ¥8,400,000、Indirect Cost: ¥2,520,000)
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| Research Abstract |
We found that formal[ 4+2] cycloaddition reactions of 3-ethoxycyclobutanones with allylsilanes, silyl enol ethers, imines, or indoles proceeded smoothly to afford the corresponding six-membered cyclic compounds in high yields by activating the cyclobutanones with appropriate Lewis acids. We accomplished total synthesis of(±)-bremazocine and(±)-aspidospermidine by using the new cycloaddition.
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