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DOI: 10.1055/s-2004-822314
Novel Regio- and Stereoselective Dimerization of Terminal Alkynes Catalyzed by Rare-Earth Silylamide
Publication History
Publication Date:
23 March 2004 (online)
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Abstract
Rare-earth silylamide complex, Y[N(SiMe3)2]3, was found to exhibit good catalyst activities for regio- and stereoselective dimerization of terminal aliphatic and aromatic alkynes in the presence of amine additives. Thus, using tertiary amine additives, particularly N(SiMe3)3, aliphatic terminal alkynes were efficiently converted to head-to-tail dimers. On the other hand, only Z-head-to-head dimers were obtained in high yields from aromatic alkynes with the catalyst and aromatic primary amines such as 4-ClC6H4NH2.
Key words
dimerization - terminal alkynes - enynes - rare-earth silylamide - amine additives
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References
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