TiO 2 Nanoparticles Immobilized on Carbon Nanotubes: An Efficient Heterogeneous Catalyst in Cyclocondensation Reaction of Isatins with Malononitrile and 4‐Hydroxycoumarin or 3,4‐Methylenedioxyphenol under Mild Reaction Conditions

2020 ◽  
Vol 34 (4) ◽  
Author(s):  
Shahrzad Abdolmohammadi ◽  
Seyed Reza Rasouli Nasrabadi ◽  
Mohammad Reza Dabiri ◽  
Sayed Mustafa Banihashemi Jozdani
Keyword(s):  
Carbon Nanotubes ◽  
Heterogeneous Catalyst ◽  
Reaction Conditions ◽  
Cyclocondensation Reaction ◽  
Efficient Heterogeneous Catalyst

scholarly journals Conversion of CO2 into Chloropropene Carbonate Catalyzed by Iron (II) Phthalocyanine Hypercrosslinked Porous Organic Polymer

Molecules ◽  
2020 ◽  
Vol 25 (20) ◽  
pp. 4598
Author(s):  
Eva M. Maya ◽  
Antonio Valverde-González ◽  
Marta Iglesias
Keyword(s):  
Heterogeneous Catalyst ◽  
Direct Synthesis ◽  
Cyclic Carbonate ◽  
Organic Polymer ◽  
Iron Loading ◽  
Reaction Conditions ◽  
Porous Organic Polymer ◽  
Commercial Iron ◽  
Excellent Stability ◽  
Efficient Heterogeneous Catalyst

Commercial iron (II) phthalocyanine (FePc) was knitted with biphenyl using a Friedel–Crafts reaction to yield a micro-meso porous organic polymer (FePc-POP) with a specific surface area of 427 m2/g and 5.42% of iron loading. This strategy allowed for the direct synthesis of a heterogeneous catalyst from an iron containing monomer. The catalytic system, formed by the knitted polymer containing FePc and DMAP (4-dimethylamino pyridine) as base, results in an efficient heterogeneous catalyst in the cycloaddition of CO2 to epichlorohydrin to selectively obtain the corresponding cyclic carbonate. Thus, a TON (mmol substrate converted/mmol catalysts used) value of 2700 was reached in 3 h under mild reaction conditions (solvent free, 90 °C, 3 bar of CO2). The catalyst does not exhibit leaching during the reactions, which was attributed to the excellent stability of the metal in the macrocycle.

scholarly journals Air-stable, recyclable, and time-efficient diphenylphosphinite cellulose-supported palladium nanoparticles as a catalyst for Suzuki–Miyaura reactions

2011 ◽  
Vol 7 ◽  
pp. 378-385 ◽  
Author(s):  
Qingwei Du ◽  
Yiqun Li
Keyword(s):  
Heterogeneous Catalyst ◽  
Palladium Nanoparticles ◽  
Palladium Complex ◽  
Complex Cell ◽  
Reaction Conditions ◽  
Highly Efficient ◽  
Excellent Yield ◽  
Simple Filtration ◽  
Supported Palladium ◽  
Efficient Heterogeneous Catalyst

A diphenylphosphinite cellulose palladium complex (Cell–OPPh2–Pd0) was found to be a highly efficient heterogeneous catalyst for the Suzuki–Miyaura reaction. The products were obtained in good to excellent yield under mild reaction conditions. Moreover, the catalyst could be easily recovered by simple filtration and reused for at least 6 cycles without losing its activity.

scholarly journals Immobilized TiO2 nanoparticles on carbon nanotubes: an efficient heterogeneous catalyst for the synthesis of chromeno[b]pyridine derivatives under ultrasonic irradiation

RSC Advances ◽  
2019 ◽  
Vol 9 (71) ◽  
pp. 41868-41876 ◽  
Author(s):  
Shahrzad Abdolmohammadi ◽  
Behrooz Mirza ◽  
Esmail Vessally
Keyword(s):  
Carbon Nanotubes ◽  
Tio2 Nanoparticles ◽  
Heterogeneous Catalyst ◽  
Ultrasonic Irradiation ◽  
Aromatic Aldehydes ◽  
Pyridine Derivatives ◽  
New Synthesis ◽  
Immobilized Tio2 ◽  
Efficient Heterogeneous Catalyst

A new synthesis of chromeno[b]pyridines is described via reaction of 4-aminocoumarin, aromatic aldehydes and malononitrile catalyzed by TiO2 nanoparticles immobilized on CNTs as an efficient heterogeneous catalyst under ultrasonic irradiation.

scholarly journals Fe3O4@Sap/Cu(ii): an efficient magnetically recoverable green nanocatalyst for the preparation of acridine and quinazoline derivatives in aqueous media at room temperature

RSC Advances ◽  
2021 ◽  
Vol 11 (26) ◽  
pp. 15989-16003
Author(s):  
Milad Kazemnejadi ◽  
Mohammad Ali Nasseri ◽  
Safoora Sheikh ◽  
Zinat Rezazadeh ◽  
Seyyedeh Ameneh Alavi Gol
Keyword(s):  
Heterogeneous Catalyst ◽  
Room Temperature ◽  
Aqueous Media ◽  
Reaction Conditions ◽  
Green Protocol ◽  
Highly Efficient ◽  
Quinazoline Derivatives ◽  
Efficient Heterogeneous Catalyst

A highly efficient, robust, and green protocol has been developed for the synthesis of acridine and quinazoline derivatives in water under mild reaction conditions using a Fe3O4@Sap/Cu(ii) nanocomposite as an efficient heterogeneous catalyst.

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