Synthesis of Benzopyrano[2,3-d]pyrimidines Using Silica-Bonded N-Propyldiethylenetriamine Sulfamic Acid (SPDTSA) As Heterogeneous Solid Acid Catalyst under Solvent-Free Conditions

Niknam, Khodabakhsh; Borazjani, Nassim -

doi:10.22036/org.chem..2015.10697

Synthesis of Benzopyrano[2,3-d]pyrimidines Using Silica-Bonded N-Propyldiethylenetriamine Sulfamic Acid (SPDTSA) As Heterogeneous Solid Acid Catalyst under Solvent-Free Conditions

Document Type : Full Paper

Authors

Khodabakhsh Niknam ¹

Nassim - Borazjani ²

¹ Persian Gulf University

² Department of Chemistry, Faculty of Sciences Persian Gulf University

10.22036/org.chem..2015.10697

Abstract

Silica-bonded N-propyldiethylenetriamine sulfamic acid (SPDTSA) is employed as a recyclable heterogeneous solid acid catalyst for the synthesis of benzopyrano[2,3-d]pyrimidines through one-pot condensation reaction of salicylaldehydes, malononitrile and secondary amines at room temperature under solvent-free conditions. SPDTSA showed much the same efficiency when used in consecutive reaction runs.

Keywords

Benzopyrano[2

3-d]pyrimidines

Heterogeneous catalysts

Solid acids

Synthesis

Solvent-free conditions