| Project/Area Number |
11650898
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Synthetic chemistry
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| Research Institution | Hiroshima University |
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Principal Investigator |
OHSHITA Joji Faculty of Engineering, Hiroshima University, Associate Professor, 工学部, 助教授 (90201376)
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| Project Period (FY) |
1999 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 2000: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 1999: ¥2,100,000 (Direct Cost: ¥2,100,000)
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| Keywords | silicon / enolate / silene / silyllithium / シラジエン / アシルシラン / 有機ケイ素 / カルボニル化合物 / 有機リチウム |
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| Research Abstract |
1. The reactions of tirs (rimehylsilyl) silanecarboxylates with lequiv of tris (trimethylsilyl) silyllihtium gave lithium alkoxybis (trimethylsilyl) silenolates (1) almos quantitatively by replacement of the trimethylsilyl group with a lithium atom. Further reaction of 1 with alkyl halides and chlorosilanes produced Si-substitution products in high yield. In contrast, with aldehydes, they gave products arising from addition reactions. They underwent oxidative coupling with palladium dichloride to give disilanedicarboxylates.
2. The reactions of lihtium silenolates with acyl chlorides gave bis- and tetraacylsilanes. This is the first synthesis of compounds having an Si atom substituted with two or more acyl groups.
3. The reactions of lithium silenolates with acetylenes were also studied. Lithium silenolates reacted readily with phenyl-substituted acetylenes to give ethenylsileolates in good yields. In contrast, they did not react with alkyl-substituted acetylenes. The ethenylsilenolates reacted with chlorosilanes to afford 2-siladiene derivatives in good yield.
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