Polystyrene-supported palladium(II) ethylenediamine complex: A highly active and recyclable catalyst for the synthesis of 2-benzylimidazo[2,1-b]pyridines through heteroannulation of acetylenic compounds

✍ Scribed by Mohammad Bakherad; Bahram Bahramian; Hossein Nasr-Isfahani; Ali Keivanloo; Nesa Doostmohammadi

• Publisher: Journal of Heterocyclic Chemistry
• Year: 2009
• Tongue: English
• Weight: 81 KB
• Volume: 46
• Category: Article
• ISSN: 0022-152X
• DOI: 10.1002/jhet.16

✦ Synopsis

Abstract

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The polymer‐supported palladium(II) ethylenediamine [PS‐en‐Pd(II)] complex is a highly active catalyst for the heterocyclization that takes place during the Sonogashira reaction between an aryl iodide and 2‐amino‐1‐(2‐propynyl)pyridinium bromide. This heterogeneous palladium catalyst can readily be recovered from the reaction medium by simple filtration and reused without a significant loss in its activity. J. Heterocyclic Chem., (2009).