A simple one-step procedure furnishing regioselectively functionalized imidazo[1,2-a]pyridines (2) by a novel condensation reaction of 1-phenylacetylimidazole (1) with acetylenic dicarboxylic esters is described; the structure of one of the products (2a) has been determined by X-ray crystallography.
H. Knölker and R. Boese, J. Chem. Soc., Chem. Commun., 1988, 1151 DOI: 10.1039/C39880001151
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