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Synlett 2011(6): 741-744
DOI: 10.1055/s-0030-1259712
DOI: 10.1055/s-0030-1259712
SYNPACTS
© Georg Thieme Verlag
Stuttgart ˙ New York
Metal-Catalyzed Cascade Reactions of Ethynyl-Substituted Naphthalenes: Synthesis of Polycyclic Arenes
Weitere Informationen
Received
8 November 2010
Publikationsdatum:
08. März 2011 (online)
Publikationsverlauf
Publikationsdatum:
08. März 2011 (online)
Abstract
Palladium-catalyzed cycloaddition reactions of 1,8-diethynylnaphthalene derivatives with o-diiodoarenes take place to generate the corresponding benzo[k]fluoranthene-based linear acenes in moderate to good yields. In addition, 1-ethynyl-8-iodonaphthalenes undergo palladium-catalyzed cyclodimerizations to produce zethrenes. Finally, in the presence of a catalytic system comprised of [NiBr2(dppe)/Zn], 1-ethynyl-8-iodonaphthalenes reacts with nitriles and 2-butyne to form the respective pyrroloarenes and pyrene.
Key words
arenes - cross-coupling - cycloadditon - nickel - palladium - polycycles
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References and Notes
The structure of 13 has been confirmed by X-ray structural analysis (Wu, T.-C.; Wu, Y.-T. unpublished results).