An unusual cobalt-mediated cleavage of a
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Naoto Hayashi; Douglas M Ho; Robert A Pascal Jr.
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Article
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2000
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Elsevier Science
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French
β 156 KB
When 1-(pentaphenylphenyl)-2-phenylacetylene (1) is heated with (Z 5 -cyclopentadienyl)dicarbonylcobalt, 1,2,3,4-tetraphenylΒ―uorene (3) and related minor products are formed rather than the expected tetraarylcyclobutadiene. The formation of 3 requires that a seven-carbon fragment (formally a phenylc