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Four indolizine derivatives were obtained  via  1,3-dipolar cycloaddition reaction of 1-(2′-benzimidazolylmethyl)pyridinium ylide with various electron-deficient alkynes. The reaction of this pyridinium  N -ylide with dimethyl maleate gave an unexpected methyl 1-oxo-benzimidazo[1,2- a ]pyridine-3-carboxylate. The structures of all reported compounds have been examined by X-ray crystallography and NMR spectroscopy.

1-(2′-Benzimidazolylmethyl)-pyridinium ylide in the one-pot synthesis of indolizine and benzimidazo[1,2- a ]pyridine derivatives