Synthesis of the glycoluril derivatives by the HZSM-5 nanozeolite as a catalyst

Abstract

In this work, we used nano-sized protonated Zeolite Socony Mobil-5 (HZSM-5) zeolite as a mild and efficient catalyst for the synthesis of tetrahydroimidazo[4,5-d]imidazole-2,5(1H,3H)dione (=glycoluril) (1) and its derivatives (2-6) through reaction between urea and dicarbonyl compound. The yield of the reactions and products were determined and discussed. The Zeolite Socony Mobil-5 (ZSM-5) nanozeolite has more reactivity in its H form. HZSM-5 was prepared by ion exchange of ZSM-5 nanozeolite with NH4Cl, followed by drying and calcination. (Formula presented.). © 2014 The Author(s). Published by Taylor & Francis.