DBU-functionalized MCM-41-coated nanosized hematite (DBU-F-MCM-41-CNSH): A new magnetically separable basic nanocatalyst for the synthesis of some nucleoside-containing heterocycles

Kordnezhadian, Reza; Shekouhy, Mohsen; Karimian, Somaye; Khalafi‐Nezhad, Ali

doi:10.1016/j.jcat.2019.10.020

Cited by 14 publications

(11 citation statements)

References 77 publications

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“…Hematite is applied as a pigment mineral, healing stone, and catalyst with magnetic separation ability. 91 Additionally, the paramagnetic ilmenite (FeTiO 3 ) and the ferrimagnetic pyrrhotite (monoclinic Fe 7 S 8 ) have emerged as great magnetically separable catalysts in different reactions. 92,93 Volcanic pumice magnetic particles (VPMPs) are light-colored, highly porous volcanic rocks with an intrinsic magnetic property of 30 emu g À1 .…”

Section: Natural-based Magnetic Systemsmentioning

confidence: 99%

Functionalized hybrid magnetic catalytic systems on micro- and nanoscale utilized in organic synthesis and degradation of dyes

et al. 2022

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Section: Natural-based Magnetic Systemsmentioning

confidence: 99%

Functionalized hybrid magnetic catalytic systems on micro- and nanoscale utilized in organic synthesis and degradation of dyes

et al. 2022

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“…Kordnezhadian et al [164] used DBU-anchored MCM-41 encapsulated hematite nanoparticles (DBUÀ F-MCM-41-CNSH) as basic catalyst for the solvent-free preparation of various nucleoside-containing pyrimido [4,5-b]quinolines, [2,3-d:6,5d']dipyrimidines and pyrido [2,3-d]pyrimidines in presence of traces of water (Figure 99). It was reported that solventless conditions bring the reactant molecules closer and facilitate effective collisions because of virtual increase in the concentration and removal of the solvent phase barrier.…”

Section: Multicomponent Reactionsmentioning

confidence: 99%

Functionalized MCM‐41: Versatile Catalysts for Organic Transformations

et al. 2022

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Functionalized MCM-41 constitute a group of potent hybrid catalysts for organic reactions. Their pore size is large enough to house large substrate molecules, the large bulk of surface silanol groups helps in introduction of a variety of functionalities required for the catalytic action. The current review emphasizes the broad methodology for the synthesis of these catalysts, effect of functionalization on reaction parameters, stability, efficiency, selectivity, reusability along with limitations of these catalysts to organic transformations, from a green chemistry standpoint. Some selected mechanisms of catalytic action are also highlighted. The review demonstrates that surface functionalized MCM-41 constitute innovative and need based catalyst systems that catalyze reactions like Sonogashira, Suzuki, Heck, Friedel Craft reaction, Aldol and Knoevenagel condensation etc. Several other reactions like oxidation, reduction, dehydration, esterification, epoxidation, CÀ S, CÀ N, CÀ O and SÀ S coupling as well as multicomponent synthesis of bioactive heterocycles have also been reported. It is hoped that this review will improve the understanding of scientific community on how these versatile catalysts operate and will provide opportunities to further enhance their utility for chemical industry.

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“…S23 in the ESI. † [55][56][57][58] Such reactions may be feasible on nucleobaseprotected DNA barcodes.…”

Section: Module Vanalysis Of Chemical Reaction Spacementioning

confidence: 99%

“…They involve malononitrile, epoxides and acrylic aldehyde as shown in Figure S23 in the ESI. [55][56][57][58] Such reactions may be feasible on nucleobase-DNA barcodes.…”

Section: Chemical Science Accepted Manuscriptmentioning

confidence: 99%