Palladium catalyzed C-P cross-coupling reactions in ionic liquids

C-P cross-coupling reactions between phosphine-borane complexes and aryl iodides are successfully performed in imidazolium based ionic liquids (ILs). To improve the recycling of the catalyst, a monophosphine covalently attached to a pyridinimn salt was prepared. Associated to palladium, this catalyst shows a high catalytic activity and stays immobilized in the IL. It was reused at least in six cycles. (c) 2006 Elsevier Ltd. All rights reserved.