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Synlett 1991; 1991(6): 431-432
DOI: 10.1055/s-1991-20753
DOI: 10.1055/s-1991-20753
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© Georg Thieme Verlag, Rüdigerstr. 14, 70469 Stuttgart, Germany. All rights reserved.
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data processing and storage.Palladium-Catalyzed Cycloaddition of Alkynes (RC≡CR′) with Dimethylgermylene
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Publication Date:
07 March 2002 (online)
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.