Synthesis, characterization and first application of keggin-type heteropoly acids supported on silica coated NiFe<sub>2</sub>O<sub>4</sub>as novel magnetically catalysts for the synthesis of tetrahydropyridines

Khojastehnezhad, Amir; Moeinpour, Farid; Bakavoli, Mehdi; Seyedi, Seyed Mohammad; Abbasi, Mohsen

doi:10.1039/c4ra05133e

Cited by 39 publications

(17 citation statements)

References 32 publications

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“…In continuation of our previous work on the development of new synthetic methods [52][53][54][55][56][57][58][59][60][61][62][63], in this research, an advance in the synthesis of biologically important materials, use of a separable magnetic nano catalyst, NFS-PWA, is reported. This new environmentally benign, heterogeneous, and highly re-usable catalyst had very good catalytic activity in the preparation of tetrahydrobenzo[b]pyrans and pyrano[2,3-c]pyrazoles (Scheme 1).…”

Section: Resultsmentioning

confidence: 95%

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Silica-coated magnetic NiFe2O4 nanoparticles-supported H3PW12O40; synthesis, preparation, and application as an efficient, magnetic, green catalyst for one-pot synthesis of tetrahydrobenzo[b]pyran and pyrano[2,3-c]pyrazole derivatives

et al. 2015

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A powerful, magnetic, supported, acid catalyst, NiFe 2 O 4 @SiO 2 -H 3 PW 12 O 40 , was prepared by chemical support of Keggin (H 3 PW 12 O 40 ) heteropolyacid (HPA) on silica-coated NiFe 2 O 4 magnetic nanoparticles. XRD, TEM, SEM, VSM, and FTIR confirmed that the keggin HPA is well dispersed on the surface of silica-coated NiFe 2 O 4 magnetic nanoparticles. The magnetically recoverable catalyst could be easily recycled at least six times without significant loss of catalytic activity. After full characterization, its catalytic activity was investigated in the synthesis of tetrahydrobenzo[b]pyran and pyrano[2,3-c]pyrazole derivatives. Graphical Abstract (1) Novel silica-coated magnetic NiFe 2 O 4 nanoparticles-supported H 3 PW 12 O 40 was fabricated and characterized. (2) Recyclability of the catalyst. (3) Avoiding use of corrosive acid catalysts. (4) Green chemistry.

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Section: Resultsmentioning

confidence: 95%

“…Silica-coated MNP (NFS) were synthesized as reported elsewhere [62,63]. Then, for immobilization of PWA on the NFS, 0.75 g PWA was dissolved in 5 ml methanol.…”

Section: Preparation Of Nife 2 O 4 @Sio 2 -H 3 Pw 12 O 40 (Nfs-pwa)mentioning

confidence: 99%

Silica-coated magnetic NiFe2O4 nanoparticles-supported H3PW12O40; synthesis, preparation, and application as an efficient, magnetic, green catalyst for one-pot synthesis of tetrahydrobenzo[b]pyran and pyrano[2,3-c]pyrazole derivatives

et al. 2015

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“…Eshgh et al . synthesized phosphotungestic acid (H 3 PW 12 O 40 ) or phosphomolybdic acid (H 3 PMo 12 O 40 ) supported silica coated nickel ferrite nanoparticles (NiFe 2 O 4 @SiO 2 @H 3 PW 12 O 40 or NiFe 2 O 4 @SiO 2 @H 3 PMo 12 O 40 ).…”

Section: Synthesis Of 126‐triaryl‐4‐arylamino‐ Piperidine‐3‐ene‐3‐cmentioning

confidence: 99%

One‐Pot Pseudo Five Component Synthesis of Biologically Relevant 1,2,6‐Triaryl‐4‐arylamino‐piperidine‐3‐ene‐3‐ carboxylates: A Decade Update

Kaur¹,

Devi²,

Kumari³

et al. 2018

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Piperidines, an important class of N‐heterocycles, are very common in naturally occurring bioactive compounds. Recently, functionalized piperidines, specifically, 1,2,6‐triaryl‐4‐arylamino‐piperidine‐3‐ene‐3‐carboxylates have drawn considerable attention due to its diverse pharmacological efficacies that include anti‐cancer, anti‐microbial, anti‐oxidant, anti‐fungal, anti‐inflammatory and acetylcholinesterase (AChE) inhibitory activities. As a result, during the last decade, a number of methods reported for the synthesis of 1,2,6‐triaryl‐4‐arylamino‐piperidine‐3‐ene‐3‐carboxylates via one‐pot pseudo five‐component reactions of aromatic aldehydes, anilines and β‐keto esters under various reaction conditions. The present review deals with the ‘‘up to date” developments on the synthesis of 1,2,6‐triaryl‐4‐arylamino‐piperidine‐3‐ene‐3‐carboxylates reported so far.

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“…As a follow‐up to our previous studies of the preparation of nanocatalysts, in the work reported here we first used an improved Hummers method (Marcano–Tour method) to prepare GO, and then used an organic ligand, namely 1,8‐diamino‐3,6‐dioxaoctane (DADO), to covalently functionalize its edges and basal plane. Finally, copper was inserted into the ligand and Cu‐coordinated DADO‐functionalized GO (GO‐DADO‐Cu) was obtained (Scheme ).…”

Section: Introductionmentioning

confidence: 99%

New functionalization of graphene oxide with N₂O₂ligand for efficient loading of Cu nanostructures as a heterogeneous nanocatalyst for the synthesis of β‐hydroxy‐1,2,3‐triazoles

Rakhshanipour

Bakavoli

2020

Applied Organom Chemis

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A new and heterogeneous copper complex immobilized on graphene oxide (GO) was prepared. This was achieved through organic functionalization of GO using 1,8‐diamino‐3,6‐dioxaoctane (DADO) and then inorganic coordination of copper on the edges and basal plane of the functionalized GO (GO‐DADO‐Cu), which was reduced to Cu(0). The chemical structure of the prepared nanocatalyst was analyzed using various techniques. Most of the analyses confirmed the successful anchoring of copper and organic ligand on the GO surface. Moreover, the synthesized nanocatalyst has shown high catalytic activity in the synthesis of β‐hydroxy‐1,2,3‐triazole derivatives under mild reaction conditions (water and room temperature) resulting in good to excellent yields.

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Synthesis, characterization and first application of keggin-type heteropoly acids supported on silica coated NiFe₂O₄as novel magnetically catalysts for the synthesis of tetrahydropyridines

Cited by 39 publications

References 32 publications

Silica-coated magnetic NiFe2O4 nanoparticles-supported H3PW12O40; synthesis, preparation, and application as an efficient, magnetic, green catalyst for one-pot synthesis of tetrahydrobenzo[b]pyran and pyrano[2,3-c]pyrazole derivatives

Silica-coated magnetic NiFe2O4 nanoparticles-supported H3PW12O40; synthesis, preparation, and application as an efficient, magnetic, green catalyst for one-pot synthesis of tetrahydrobenzo[b]pyran and pyrano[2,3-c]pyrazole derivatives

One‐Pot Pseudo Five Component Synthesis of Biologically Relevant 1,2,6‐Triaryl‐4‐arylamino‐piperidine‐3‐ene‐3‐ carboxylates: A Decade Update

New functionalization of graphene oxide with N₂O₂ligand for efficient loading of Cu nanostructures as a heterogeneous nanocatalyst for the synthesis of β‐hydroxy‐1,2,3‐triazoles

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Synthesis, characterization and first application of keggin-type heteropoly acids supported on silica coated NiFe2O4as novel magnetically catalysts for the synthesis of tetrahydropyridines

Cited by 39 publications

References 32 publications

Silica-coated magnetic NiFe2O4 nanoparticles-supported H3PW12O40; synthesis, preparation, and application as an efficient, magnetic, green catalyst for one-pot synthesis of tetrahydrobenzo[b]pyran and pyrano[2,3-c]pyrazole derivatives

Silica-coated magnetic NiFe2O4 nanoparticles-supported H3PW12O40; synthesis, preparation, and application as an efficient, magnetic, green catalyst for one-pot synthesis of tetrahydrobenzo[b]pyran and pyrano[2,3-c]pyrazole derivatives

One‐Pot Pseudo Five Component Synthesis of Biologically Relevant 1,2,6‐Triaryl‐4‐arylamino‐piperidine‐3‐ene‐3‐ carboxylates: A Decade Update

New functionalization of graphene oxide with N2O2ligand for efficient loading of Cu nanostructures as a heterogeneous nanocatalyst for the synthesis of β‐hydroxy‐1,2,3‐triazoles

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Synthesis, characterization and first application of keggin-type heteropoly acids supported on silica coated NiFe₂O₄as novel magnetically catalysts for the synthesis of tetrahydropyridines

New functionalization of graphene oxide with N₂O₂ligand for efficient loading of Cu nanostructures as a heterogeneous nanocatalyst for the synthesis of β‐hydroxy‐1,2,3‐triazoles