A novel palladium-catalyzed synthesis of phenanthrenes from ortho-substituted aryl iodides and diphenyl- or alkylphenylacetylenes.
[reaction--see text] 1,5-Selectively disubstituted 9,10-diphenyl- or alkylphenylphenanthrenes are obtained by reaction of ortho-substituted aryl iodides and diphenyl- or alkylphenylacetylenes in the presence of palladium and norbornene as catalysts. The reaction outcome is controlled by the steric effect exerted by the ortho substituent in the aryl iodide.
Catellani
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M
Dipartimento di Chimica Organica e Industriale, Università di Parma, Parco Area delle Scienze, 17A, I-43100 Parma, Italy. marta.catellani@unipr.it
Motti
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Baratta
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