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Synlett 1991; 1991(6): 431-432
DOI: 10.1055/s-1991-20753
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Palladium-Catalyzed Cycloaddition of Alkynes (RC≡CR′) with Dimethylgermylene

Hartmut Brauer* , Wilhelm P. Neumann
  • *Lehrstuhl für Organische Chemie I der Universität Dortmund, Otto-Hahn-Str. 6, D-4600 Dortmund 50, Germany
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Publication Date:
07 March 2002 (online)

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The cycloaddition of alkynes with free singlet dimethylgermylene catalyzed by tetrakis(triphenylphosphine)-palladium(0) leads regioselectively in high yield to new 1-germacyclopenta-2,4-dienes, 1,4-digermacyclohexa-2,5-dienes, and 1-oxa-2-germacyclopent-3-enes with an exocyclic double bond. The latter yield, with acetic acid, quantitatively the substituted vinylgermyl acetates.

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