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Ilam petrochemical Complex, Ilam, IranReceived March 3, 2012, Accepted April 2, 2012A rapid and practical green route for N-formylation of primary and secondary amines with formic acid at roomtemperature under the solvent-free conditions using HEU zeolite as a heterogeneous, reusable and highlyefficient catalyst is described. The process is remarkably simple and environmentally benign. Excellentchemoselectivity was observed for the conversion of primary amines in the presence of secondary amines.Key Words : N-Formylation, Amines, Solvent-free, Natural HEU zeolite, Formic acidIntroductionFormamides are important intermediates in the prepa-ration of amine derivatives and have been widely used in thesynthesis of pharmaceutically valuable compounds.

An Efficient Method for N-Formylation of Amines Using Natural HEU Zeolite at Room Temperature Under Solvent-Free Conditions