Novel Synthesis of the Angular [3]Phenylene (Terphenylene) by Cobalt-Catalyzed Cyclization of Bis(2-ethynylphenyl)ethyne: a Molecule with an Internal Cyclohexatriene Ring

Authors

  • Dr. Rainer Diercks,

    1. Department of Chemistry, University of California, and the Materials and Molecular Research Division, Lawrence Berkeley Laboratory, Berkeley, CA 94 720 (USA)
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  • Professor Dr. K. Peter C. Vollhardt

    Corresponding author
    1. Department of Chemistry, University of California, and the Materials and Molecular Research Division, Lawrence Berkeley Laboratory, Berkeley, CA 94 720 (USA)
    • Department of Chemistry, University of California, and the Materials and Molecular Research Division, Lawrence Berkeley Laboratory, Berkeley, CA 94 720 (USA)
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  • This work was supported by the National Institutes of Health (CA 20 173). K. P. C. V. is a Miller Research Professor in Residence (1985–1986). R. D. was the recipient of a NATO Science Fellowship (1984–1985). The X-ray structural analysis was carried out by Dr. F. J. Hollander, staff crystallographer.

Abstract

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The first real cyclohexatriene derivative, the title compound 2, has been characterized by an X-ray structure analysis. In the key step of the new, productive synthesis, the triyne 1 is cyclized in the presence of the catalyst [(C5H5)Co(CH2[DOUBLE BOND]CH2)2].

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