Mesoporous MCM‐41 Silica Supported Pyridine Nanoparticle: A Highly Efficient, Recyclable Catalyst for Expeditious Synthesis of Quinoline Derivatives through Domino Approach

Mal, Kajal; Chatterjee, Sauvik; Bhaumik, Asim; Mukhopadhyay, Chhanda

doi:10.1002/slct.201803708

Cited by 20 publications

(13 citation statements)

References 110 publications

(28 reference statements)

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“…Hence, our synthesized nanoparticle is recyclable catalyst. [73,74] There is reduction of copper observed after recycle by XPS analysis of spent but this reduction of Cu(ii) into Cu(0) catalyse the reduction reaction and this Cu(0) again oxidized to copper oxide in alkaline medium. [75,76]…”

Section: Kinetic and Recycle Studymentioning

confidence: 99%

Ketone Hydrogenation by Using ZnO−Cu(OH)Cl/MCM‐41 with a Splash of Water: An Environmentally Benign Approach

Choudhary

Ghosh

Mobin

2020

Chemistry An Asian Journal

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MCM-41-supported ZnOÀ Cu(OH)Cl nanoparticles were synthesized via an incipient wetness impregnation technique using zinc chloride and copper chloride salts as well as water at room temperature. The catalyst was characterized by powder X-ray diffraction (PXRD), infrared spectroscopy (IR), and TGA, whereas surface and morphological studies were performed by using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The above studies revealed the incorporation of metal species into the pores of MCM-41, leading to a decrease in surface area of the nanoparticles that was found to be 239.079 m 2 /g. The substituents attached to the ketone determine the rate of the reaction, and the utilization of the green solvent 'water' astonishingly completes the hydrogenation reaction in 45 minutes at 40°C with 100% conversion and 100% selectivity as analyzed by gas chromatography-mass spectrometry. Hence, ZnOÀ Cu(OH)Cl/MCM-41 nanoparticles with 2.46 wt% zinc and 6.39 wt% copper were demonstrated as an active catalyst for the reduction of ketones without using any gaseous hydrogen source making it highly efficient as well as environmentally and economically benign.

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Section: Kinetic and Recycle Studymentioning

confidence: 99%

Ketone Hydrogenation by Using ZnO−Cu(OH)Cl/MCM‐41 with a Splash of Water: An Environmentally Benign Approach

Choudhary

Ghosh

Mobin

2020

Chemistry An Asian Journal

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“…3‐mercaptopropyltrimethoxysilane (MPTMS) is the mostly used mercaptosilane for the preparation of sulfur FSs . T. T. V. Tran et al.…”

Section: Conventional Fss: Types and Their Chemical Modificationsmentioning

confidence: 99%

“…In addition to oxidation, thiol FSs could undergo other significant chemical modifications as described here . Thiol FS has undergone a nucleophilic substitution with chloroethanol.…”

Section: Conventional Fss: Types and Their Chemical Modificationsmentioning

confidence: 99%

“…For the synthesis of a pyridine containing silica supported base catalyst, K. Mal et al. have reacted (3‐chloromethyl)pyridinehydrochloride with thiol FS in the presence of triethylamine . On the other hand, in few cases, thiol FSs have been utilized without undergoing the aforementioned chemical modifications .…”

Section: Conventional Fss: Types and Their Chemical Modificationsmentioning

confidence: 99%

“…Amine FS has catalyzed the synthesis of chromene and dimethyl carbonate . Tripolyphosphate FS, urea FS, guanidine FS, phosphoric acid FS and pyridine FS are found catalytic applications in the synthesis of 3‐acyloxylindolines, benzlidenemalononitrile, furanone derivatives, spiropyrans and quinoline derivatives, respectively. 6H‐chromeno[4,3‐b]quinolin‐6‐ones, substituted styrenes, carbinolamides, napthopyrans and pyran derivatives have been recently prepared using IL FS catalysts.…”

Section: Applications and Advantages Of Fs‐based Catalystsmentioning

confidence: 99%

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Functionalized Silicas for Metal‐Free and Metal‐Based Catalytic Applications: A Review in Perspective of Green Chemistry

Antony

Marimuthu

Yang

et al. 2019

The Chemical Record

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Heterogeneous catalysis plays a key role in promoting green chemistry through many routes. The functionalizable reactive silanols highlight silica as a beguiling support for the preparation of heterogeneous catalysts. Metal active sites anchored on functionalized silica (FS) usually demonstrate the better dispersion and stability due to their firm chemical interaction with FSs. Having certain functional groups in structure, FSs can act as the useful catalysts for few organic reactions even without the need of metal active sites which are termed as the covetous reusable organocatalysts. Magnetic FSs have laid the platform where the effortless recovery of catalysts is realized just using an external magnet, resulting in the simplified reaction procedure. Using FSs of multiple functional groups, we can envisage the shortened reaction pathway and, reduced chemical uses and chemical wastes. Unstable bio‐molecules like enzymes have been stabilized when they get chemically anchored on FSs. The resultant solid bio‐catalysts exhibited very good reusability in many catalytic reactions. Getting provoked from the green chemistry aspects and benefits of FS‐based catalysts, we confer the recent literature and progress focusing on the significance of FSs in heterogeneous catalysis. This review covers the preparative methods, types and catalytic applications of FSs. A special emphasis is given to the metal‐free FS catalysts, multiple FS‐based catalysts and magnetic FSs. Through this review, we presume that the contribution of FSs to green chemistry can be well understood. The future perspective of FSs and the improvements still required for implementing FS‐based catalysts in practical applications have been narrated at the end of this review.

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Decade Advance of Isatin in Three‐component Reactions

Zhang

Huang

et al. 2023

Asian J Org Chem

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Isatin is an important building block in organic synthesis. The electron-deficient carbonyl in C-3 site is similar to aldehyde. C-3 carbonyl is also able to function as the Onucleophile. Devise methodologies about three-component reactions of isatin have been reported in this decade. This review highlights these multicomponent reactions by triggered mechanisms. We hope it will promote future research in this area.

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Mesoporous MCM‐41 Silica Supported Pyridine Nanoparticle: A Highly Efficient, Recyclable Catalyst for Expeditious Synthesis of Quinoline Derivatives through Domino Approach

Cited by 20 publications

References 110 publications

Ketone Hydrogenation by Using ZnO−Cu(OH)Cl/MCM‐41 with a Splash of Water: An Environmentally Benign Approach

Ketone Hydrogenation by Using ZnO−Cu(OH)Cl/MCM‐41 with a Splash of Water: An Environmentally Benign Approach

Functionalized Silicas for Metal‐Free and Metal‐Based Catalytic Applications: A Review in Perspective of Green Chemistry

Decade Advance of Isatin in Three‐component Reactions

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