Synthesis of organosilicon polymers by using the Lewis-acid-catalyzed trans-allylsilylation of alkynes |
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| Authors: | Naoki Asao |
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| Institution: | Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8578, Japan |
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| Abstract: | The HfCl4 catalyzed polymerization of allyl(4-ethynylphenyl)dimethylsilane (1a) proceeded smoothly to give polydimethyl-(1,4-pentadienyl)phenylsilane] (2a), and the HfCl4 catalyzed reaction of 1-allyl-2-(4-ethynyphenyl)-1,1,2,2-tetramethyldisilane (1b) afforded poly1,1,2,2-tetramethyl-1-(1,4-pentadienyl)-2-phenyldisilane] (2b). These polymerization reactions proceeded via the stereoselective trans-allylsilylation of the 4-ethynyl group attached to the aromatic ring. |
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| Keywords: | Organosilicon polymer σ-π Conjugation Allylsilylation Lewis-acid catalyst Carbometallation Hafnium chloride |
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