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Paper | Regular issue | Vol 65, No. 5, 2005, pp.1071-1078
Published online, 3rd March, 2005
DOI: 10.3987/COM-05-10340
Preliminary Study of Palladium Catalyzed Iminoannulation in an Imidazo[1,2-a]pyridine Series

Mounir Andaloussi, Jean M. Chezal, Emmanuel Moreau, Claire Lartigue, Anas El Laghdach, Jean C. Teulade, and Olivier Chavignon*

*Laboratoire de Chimie Organique Thérapeutique, Groupe de Recherche en Pharmacochimie, Faculté de Pharmacie, Université de Clermont I, 28, Place Henri Dunant, B.P. 38, 63001 Clermont-Ferrand Cedex, France


Palladium-catalyzed iminoannulation was carried out in an imidazo[1,2-a]pyridine (IP) series. tert-Butylimine of 3-haloimidazo[1,2-a]pyridine-2-carbaldehyde reacted with suitably functionalized alkynes in the presence of a catalytic amount of Pd(OAc)2/PPh3 and a base to yield dipyrido[1,2-a; 3’,4’-d]imidazoles (5).