Green, One-Pot, Solvent-Free Synthesis of 1,2,4,5-Tetrasubstituted Imidazoles Using a Brønsted Acidic Ionic Liquid as Novel and Reusable Catalyst

Silica Gel-Supported Polyphosphoric Acid (PPA-SiO2) Catalyzed One-Pot Multi-Component Synthesis of 3,4-Dihydropyrimidin-2(1H)-ones and -thiones: An Efficient Method for the Biginelli Reaction

“…Due to our interest in the synthesis of heterocyclic compounds, [25][26][27][28][29] and in continuation of our previous works on the applications of reusable catalysts in organic reactions, [30][31][32][33][34][35][36][37][38][39] herein we reported the PPA-SiO 2 catalyzed synthesis of 3,4-dihydropyrimidin-2(1H)-ones and -thiones (Scheme 1).…”

Carbon-based Solid Acid Catalyzed One-pot Mannich Reaction: A Facile Synthesis of β-Amino Carbonyl Compounds

“…In continuation of our previous works on the applications of reusable catalysts in the synthesis of organic compounds, [18][19][20][21][22][23][24][25][26][27] we report herein a new and efficient synthesis of β-amino carbonyl compounds by condensation of acetophenone, aromatic aldehydes and aromatic amines using CBSA as a catalyst (Scheme 1).…”

Tetrabutylammonium Hexatungstate [Tba]2[w6o19]: A Novel Heterogeneous Catalyst for One-Pot Synthesis of Hantzsch 1,4-Dihydropyridines in Solvent-Free

“…Prompted by these findings and interest on the development of novel synthetic methodologies in organic reactions [24][25][26][27][28][29][30] …”