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Synthesis 2004(18): 3084-3088
DOI: 10.1055/s-2004-834894
DOI: 10.1055/s-2004-834894
SPECIALTOPIC
© Georg Thieme Verlag Stuttgart · New York
Selective [2+2+2] Cycloaddition of Nickel-Benzyne and an Asymmetric 1,3-Diyne: An Iterative Route to Substituted [n]Acenes
Further Information
Received
4 September 2004
Publication Date:
22 October 2004 (online)
Publication History
Publication Date:
22 October 2004 (online)

Abstract
A new iterative route to substituted acenes is reported that centers on regioselective cycloaddition of a nickel-benzyne and 1-trimethylsilyl-1,3-pentadiyne. The five-step sequence installs two fused aromatic rings and two methyl substituents onto the backbone in 27% overall yield.
Key words
alkynes - cycloaddition - fused-ring systems - nickel - regioselectivity
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