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Synthesis 2013; 45(17): 2469-2473
DOI: 10.1055/s-0033-1338500
DOI: 10.1055/s-0033-1338500
paper
Phenylated Benzotetraphenes (Dibenzanthracenes) by Nickel-Catalyzed Diphenylacetylene Cycloadditions to Linear [3]Phenylenes
Further Information
Publication History
Received: 01 May 2013
Accepted after revision: 04 June 2013
Publication Date:
24 June 2013 (online)


Abstract
Ni(COD)(PMe3)2 catalyzes the cycloaddition of diphenylacetylene to the four-membered rings of linear [3]phenylene and its 2,3,7,8-tetrakis(trimethylsilyl) derivative. The reaction proceeds via initial formation of the 5,6-diphenylbenzo[3,4]cyclobuta[1,2-b]phenanthrene frame, followed by a competitive second, nonregioselective alkyne insertion to furnish the corresponding phenyl-substituted benzo[k]- and -[m]tetraphenes.
Supporting Information
- (1H and 13C NMR spectra of new compounds) for this article is available online at http://www.thieme-connect.com/ejournals/toc/synthesis.
- Supporting Information