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Synthesis 2008(6): 995-997  
DOI: 10.1055/s-2007-990934
PSP
© Georg Thieme Verlag Stuttgart · New York

Unsymmetrical Aryl-Aryl Cross-Coupling Leading to 6H-Dibenzopyrans

Elena Mottia, Nicola Della Ca’a, Raffaella Ferracciolib, Marta Catellani*a
a Dipartimento di Chimica Organica e Industriale, Università di Parma, V. le G. P. Usberti 17/A, 43100 Parma, Italy
Fax: +39(0521)905472; e-Mail: marta.catellani@unipr.it;
b CNR-Istituto di Scienze e Tecnologie Molecolari (ISTM), Via C. Golgi 19, 20133 Milano, Italy
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Publication History

Received 14 August 2007
Publication Date:
28 November 2007 (online)

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Abstract

6H-Dibenzopyrans are prepared starting from ortho-substituted aryl iodides, o-bromophenols and activated olefins, in the presence of a catalytic system based on palladium acetate and norbornene by means of a simple and efficient, one-pot, three-component procedure under mild conditions.

Key words

dibenzopyrans - aryl-aryl cross-coupling - palladium - norbornene - catalysis