ChemInform Abstract: Polyphosphoric Acid Catalyst for the One-Pot Synthesis of 3,4-Dihydropyrimidin-2(1H)-ones by Grinding under Solvent-Free Conditions.
ZnO nanoparticles as a worthwhile and recyclable catalyst have been used for the one-pot synthesis of 1,8-dioxo-decahydroacridines and 1,8-dioxooctahydro-xanthenes via multi-component reactions under solvent-free conditions. The presented method is mild, environmentally friendly, inexpensive and highly effective to give the products in good to excellent yields.