o-Diethynylbenzene is catalytically co-cyclised with alkynes in the presence of dicarbonyl(cyclopentadienyl)cobalt to provide a versatile synthesis of the biphenylene nucleus.
Berris, Bruce C.,Lai, Yee-Hing,Vollhardt, Peter C.
A p-benzyne to m-benzyne conversion through a 1,2-shift of a phenyl group. Completion of the benzyne cascade
Pyrolysis of 1,6-diphenylhexa-1,5-diyne-cis-3-ene at 800-1000 °C leads to a mixture of 1- and 2-phenylbiphenylene, along with triphenylene. Formation of the two biphenylenes is taken as strong evidence of the rearrangement of a p-benzyne into a m-benzyne through a shift of one of the phenyl groups. Copyright
Polishchuk, Alexei L.,Bartlett, Kevin L.,Friedman, Lee A.,Jones Jr., Maitland
p. 798 - 806
(2007/10/03)
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