Application of Ti-MOF-UR as a new porous catalyst for the preparation of pyrazolo[3,4-b]quinoline and pyrazolo[4,3-e]pyridines

Application of Functionalized Zn-Based Metal–Organic Frameworks (Zn-MOFs) with CuO in Heterocycle Synthesis via Azide–Alkyne Cycloaddition

“…Initially, the starting materials, such as 4-(4-ethynylphenyl)­pyridine and 4-(4-ethynylphenyl)-1,4-dihydropyridine derivatives, 3-(1-methyl-1 H -pyrrol-2-yl)-3-oxopropanenitrile (Scheme ), 3-(5-methoxy-2-methyl-1 H -indol-3-yl)-3-oxopropanenitrile (Scheme ), 3-(1 H -indol-3-yl)-1 H -pyrazol-5-amine (Scheme ), and 3-(4-chlorophenyl)-1 H -pyrazol-5-amine (Scheme ), were prepared according to the reported methods in the literature, ,− respectively. In the next step, a mixture of starting materials (A and B) (each one 1 mmol), 4-ethynylbenzaldehyde (1 mmol, 0.130 g), and Zn-MOF@CuO (10 mg) as a catalyst were stirred at 110 °C under solvent-free conditions.…”

Synthesis and Application of Task-Specific Bimetal–Organic Frameworks in the Synthesis of Biological Active Spiro-Oxindoles

“…With the industrialization of societies, the need for effective catalysts for use in various industries has increased. , The design and synthesis of effective catalysts can be useful in reducing various kinds of water pollution and natural soil with the effect of reducing the number of byproducts and not requiring much energy consumption to carry out the reaction. , Metal–organic frameworks (MOFs) are a new class of nanoreactors that are composed of various metals and organic compounds as ligands. − Diversity in the selection of suitable ligands and metals has made MOFs designable. Due to their special structure, these porous compounds have distinctive features such as adjustable chemistry, pore size, large specific surface area, and very diverse structure. , This unique structure of MOFs has been used in various fields such as catalysis, − photocatalysis, , magnetic resonance imaging (MRI), gas separation and storage, biotechnology, drug delivery, and other fields .…”

Design, synthesis and application of a magnetic H-bond catalyst in the preparation of new nicotinonitriles via cooperative vinylogous anomeric-based oxidation

“…13,14 Hydrogen bond catalysts are substances that facilitate secondary bond formation between hydrogen and lone pairs within molecules. 15,16 Hydrogen bonds occur when a hydrogen atom is attracted by a lone pair from an electronegative atom (such as oxygen, nitrogen, or uorine) of another molecule. These bonds can signicantly affect the physical and chemical properties of molecules and play an important role in various biological and chemical processes.…”