Novel UiO-NH₂-like Zr-Based MOF (Basu-DPU) as an Excellent Catalyst for Preparation of New 6<i>H</i>-Chromeno[4,3-<i>b</i>]quinolin-6-ones

Abstract

High Resolution Image Download MS PowerPoint Slide A new two-fold interpenetrated pillar-layered metal–organic framework (MOF) was designed and synthesized based on zirconium cations, an amine-functionalized ligand, and a linear exo -bidentate bis-pyridine ligand. The structure of the prepared framework was evaluated using various techniques, such as Fourier transform infrared (FTIR), 13 C NMR, energy-dispersive X-ray (EDX), elemental mapping analysis, scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis/differential thermal analysis (TGA/DTA), and Brunauer–Emmett–Teller (BET). Then, catalytic application of the prepared zirconium-based MOF was successfully explored in the synthesis of novel 6 H -chromeno[4,3- b ]quinolin-6-ones 4(a–l) through a one-pot three-component condensation reaction of 4-hydroxycumarine, 1-naphthylamine, and aromatic aldehydes under solvent-free conditions at 110 °C. The pure products were obtained with high atom efficiency (AE) and short reaction times and characterized by FTIR, NMR, and mass spectrometry techniques.