Synthesis of Imidazo[1,2-a]pyridines: "Water-Mediated" Hydroamination and Silver-Catalyzed Aminooxygenation
Darapaneni Chandra Mohan, Sadu Nageswara Rao and Subbarayappa Adimurthy*
*Central Salt & Marine Chemicals Research Institute, Council
of Scientific & Industrial Research, G.B. Marg, Bhavnagar-364 002, Gujarat,
India, Email: adimurthy
csmcri.org
D. C. Mohan, S. N. Rao, S. Adimurthy, J. Org. Chem., 2013, 78, 1266-1272.
DOI: 10.1021/jo3025303
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Abstract
An aqueous synthesis gives methylimidazo[1,2-a]pyridines, imidazo[1,2-a]pyrazines, and imidazo[2,1-a]isoquinolines without any deliberate addition of catalyst. Using acetonitrile as solvent, Ag-catalyzed intramolecular aminooxygenation produced imidazo[1,2-a]pyridine-3-carbaldehydes in good yields.
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Key Words
Imidazo[1,2-a]pyridines, Green Chemistry
ID: J42-Y2013-0380
