Application of Heteropolyacids and Nano-catalyst in Heterocycles Synthesis

Abstract

Heteropolyacids (HPAs) possess unique properties such as: well-defined structure, Bronsted acidity, possibility to modify their acidbase and redox properties by changing their chemical composition (substituted HPAs), ability to accept and release electrons, high proton mobility, etc. In view of green chemistry, the substitution of harmful liquid acids by solid reusable HPAs as catalyst in organic synthesis is the most promising application of this acids. Heteropolyacids (HPAs) and related compounds have received considerable attention as solid acids in recent years. The application of heteropolyacids as catalytic materials is growing continuously in the catalytic field.