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

Abstract

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 6H-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.

MOF-Derived ZrO2-Supported Bimetallic Pd–Ni Catalyst for Selective Hydrogenation of 1,3-Butadiene

“…Among the various types of MOFs, Zr-based MOFs have been extensively studied by catalysis scholars owing to the strong Zr-O coordination bond, feasible synthesis conditions, and the ease of reproducibility [43,44]. UiO-67 is one of the Zr-MOFs, which consists of Zr 6 (OH) 4 O 4 clusters and 4,4-biphenyl dicarboxylic acid (H 2 bpdc) linkers [45,46].…”

Palladium immobilized on guanidine functionalized magnetic nanoparticles: a highly effective and recoverable catalyst for ultrasound aided Suzuki–Miyaura cross-coupling reactions

“…[16][17][18] Despite the prevalence of the reaction, various studies have been conducted recently to develop a stable, economical, and effective heterogenous catalyst using various solid supports, such as carbon-based materials, 19,20 graphene oxides, 21 boehmite, 22 and metal-organic frameworks. [23][24][25] Iron oxide is one of the utilized supports for anchoring the metal nanoparticles as a catalyst in organic synthesis for its inherent features, such as paramagnetism, ease of synthesis, compatibility with the environment, and easy separation by an external magnet. [26][27][28][29][30] On the other hand, guanidine, a naturally occurring nitrogen-rich compound acting as a superbase and N-donor ligand to easily coordinate with the metal ions, is used for the surface functionalization of magnetic supports.…”