New Syntheis of 2,5-Difunctionalized 3,4-Dialkylsiloles.
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Accession number;99A0308719
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| Title;New Syntheis of 2,5-Difunctionalized 3,4-Dialkylsiloles. |
| Author;
YAMAGUCHI S
(Kyoto Univ., Kyoto, Jpn)
JIN R-Z
(Kyoto Univ., Kyoto, Jpn)
OHNO S
(Kyoto Univ., Kyoto, Jpn)
TAMAO K
(Kyoto Univ., Kyoto, Jpn)
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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.52-53(1998)
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| Figure&Table&Reference; |
| Pub. Country;Japan |
| Language;English |
| Abstract;A new synthetic route to 2,5-difunctionalized 3,4-dialkylsiloles has been developed. Halogenolysis of titanacyclopentadienes, prepared from alkynes and (.ETA.2-propene)Ti(Oi-Pr)2, affords 1,4-dihalobutadienes, which are further transformed into silole derivatives. Selective halodesilylation reactions of 2,5-disilylsiloles thus prepared give a series of 3,4-dialkyl-2,5-dihalosiloles. Some 2,5-dihalosiloles are further derivatized to unsymmetrical 2,5-difunctionalized siloles having boron or tin functionalities. A silole dimer, 2,2'-bisilole, has also been prepared by the oxidative coupling using copper complex starting from 2,5-diiodosiloles and the crystal structure and UV-vis absorption spectra have been determined. (author abst.) |
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