Synthesis and Characterization of 2,3,5,6,7,8-Hexadilabicyclo[2.2.2]octanes.
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Accession number;99A0308694
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| Title;Synthesis and Characterization of 2,3,5,6,7,8-Hexadilabicyclo[2.2.2]octanes. |
| Author;
SHIMIZU M
(Kyoto Univ., Kyoto)
INAMASU N
(Tokyo Inst. Technol., Kanagawa)
HIYAMA T
(Kyoto Univ., Kyoto)
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Journal Title;Abstr Symp Organomet Chem Jpn
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Journal Code:L0853A
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ISSN:
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VOL.45th;NO.;PAGE.2-3(1998)
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| Figure&Table&Reference; |
| Pub. Country;Japan |
| Language;English |
| Abstract;2,2,3,3,5,5,6,6,7,7,8,8-Dodecamethyl-2,3,5,6,7,8-hexasilabicyclo[2.2.2]octane(1) was synthesized for the first time via three steps in 56% overall yield through triple silylation with three dichlorodimethyldisilane molecules of two trianionic molecules derived from bis(phenylthio)methane. The molecular structure of 1 was shown to be slightly distorted from an ideal bicyclo[2.2.2]octane skeleton by X-ray analysis. Deprotonation of 1 at the two bridgehead carbons with a superbase cosisting of BuLi/t-BuOK followed by a reaction with such an electrophile as chlorosilane and methyl iodide gave the corresponding derivatives in excellent yields. UV spectra of 1 and its derivatives exhibited a bathochromic shift and hypochromic effect according to the number of C-Si and Si-Si bonds. (author abst.) |
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