Synthesis of Silafluorenes by Iridium-Catalyzed [2 + 2 + 2] Cycloaddition of Silicon-Bridged Diynes with Alkynes

Silicon-bridged 1,6-diynes underwent [2 + 2 + 2] cycloaddition with alkynes in the presence of an iridium(I)−phosphine catalyst to afford densely substituted silafluorene derivatives. Extended silafluorene skeletons were constructed by the [2 + 2 + 2] cycloaddition of tetraynes.

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Bibliographic Details
Published in:Organic letters 2007-01, Vol.9 (1), p.133-136
Main Authors: Matsuda, Takanori, Kadowaki, Sho, Goya, Tsuyoshi, Murakami, Masahiro
Format: Article
Language:English
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Summary:Silicon-bridged 1,6-diynes underwent [2 + 2 + 2] cycloaddition with alkynes in the presence of an iridium(I)−phosphine catalyst to afford densely substituted silafluorene derivatives. Extended silafluorene skeletons were constructed by the [2 + 2 + 2] cycloaddition of tetraynes.
ISSN:1523-7060
1523-7052
DOI:10.1021/ol062732n