Chloroaluminate ionic liquid‐modified silica‐coated magnetic nanoparticles: Efficient and reusable catalyst for selective synthesis of mono‐ and bis‐dihydropyrano[3,2‐ b ]chromenediones

2017 ◽  
Vol 31 (11) ◽  
Author(s):  
Ehsan Estakhri ◽  
Mahboobeh Nasr‐Esfahani ◽  
Iraj Mohammadpoor‐Baltork ◽  
Shahram Tangestaninejad ◽  
Majid Moghadam ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Magnetic Nanoparticles ◽  
Reusable Catalyst ◽  
Selective Synthesis ◽  
Modified Silica

Magnetic Nanoparticles Supported Acidic Ionic Liquid as a Highly Active and Reusable Catalyst for Esterification

2016 ◽  
Vol 852 ◽  
pp. 485-488 ◽  
Author(s):  
Qiang Zhang ◽  
Xin Zhao ◽  
Xue Hua Zhu ◽  
Ji Hang Li
Keyword(s):  
Ionic Liquid ◽  
Catalytic Activity ◽  
Magnetic Nanoparticles ◽  
Catalytic Performance ◽  
Significant Loss ◽  
Reusable Catalyst ◽  
Hydrogen Sulfate ◽  
External Magnet ◽  
Acidic Ionic Liquid ◽  
Highly Active

A magnetic nanoparticles supported dual acidic ionic liquid catalyst was prepared via anchoring 3-sulfobutyl-1-(3-propyltriethoxysilane) imidazolium hydrogen sulfate onto the surface of silica-coated Fe3O4 nanoparticles. And this novel supported acidic ionic liquid catalyst showed good catalytic performance in esterification. More importantly, the catalyst could be easily recovered by an external magnet and reused six times without significant loss of catalytic activity.

A Suitable One-Pot Synthesis of 3,4-Dihydropyrano[3,2-c]Chromenes Using Magnetic Nanoparticles Tag: Piperidinium Benzene-1,3-Disulfonate Ionic Liquid as a Novel, Green, Efficient and Reusable Catalyst in Aqueous Medium

2017 ◽  
Vol 14 (6) ◽  
pp. 904-911 ◽  
Author(s):  
Ramin Ghorbani-Vaghei ◽  
Jafar Mahmoodi ◽  
Yaser Maghbooli ◽  
Azadeh Shahriari
Keyword(s):  
Ionic Liquid ◽  
Magnetic Nanoparticles ◽  
Reaction Times ◽  
Catalytic Amount ◽  
High Yield ◽  
Reusable Catalyst ◽  
One Pot ◽  
Efficient Catalyst ◽  
Water Solvent ◽  
The One

Background: The synthesis of 3,4-dihydropyrano[3,2-c]chromenes via the one-pot three-component reactions of various aldehydes, malononitrile, and 4-hydroxycumarin at 60 °C in water as a solvent by the magnetic nanoparticles tag: piperidinium benzene-1,3-disulfonate ionic liquid as a green and efficient catalyst. Some benefits of the presented technique are significant cost impact, impressive catalysis and the ability to reuse of the catalyst. The current procedure offers high yield, short reaction times, neat reaction and simple reusable catalyst. Objective: A magnetic nanoparticles tag: piperidinium benzene-1,3-disulfonate ionic liquid as a green, efficient, reusable and heterogeneous catalyst was used for the synthesis of 3,4-dihydropyrano[3,2-c]chromenes. Method: We have described an efficient and green process for the synthesis of the one-pot three-component synthesis of 3,4-dihydropyrano[3,2-c]chromenes from the reaction between 4-hydroxy-coumarin with malononitrile and aldehydes in the presence of catalytic amount of magnetic nanoparticles tag: piperidinium benzene-1,3-disulfonate ionic liquid as a novel and powerful nano ionic liquid with good to excellent yields and in a short reaction time in water solvent at 60 °C. Result: The main advantage of this process is the simplicity of the work-up and the products can be isolated without chromatography. Conclusion: We suggest that the method has also various additional advantages such as low loading of catalyst, clean reaction, which makes it a suitable and noteworthy approach for the synthesis of 3,4- dihydropyrano[3,2-c]chromenes.

scholarly journals Novel magnetic nanoparticles with ionic liquid tags as a reusable catalyst in the synthesis of polyhydroquinolines

RSC Advances ◽  
2016 ◽  
Vol 6 (86) ◽  
pp. 82842-82853 ◽  
Author(s):  
Meysam Yarie ◽  
Mohammad Ali Zolfigol ◽  
Yadollah Bayat ◽  
Asiye Asgari ◽  
Diego A. Alonso ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Magnetic Nanoparticles ◽  
Reusable Catalyst ◽  
Reaction Conditions

{Fe3O4@SiO2@(CH2)3Im}C(NO2)3 as a novel nanostructured heterogeneous reusable catalyst was used for the four component preparation of the polyhydroquinoline derivatives under mild and eco-friendly reaction conditions.

[Mn(TPPS)] immobilized on ionic liquid-modified silica as a heterogeneous and reusable catalyst for epoxidation of alkenes with NaIO4 under ultrasonic irradiation

2016 ◽  
Vol 13 (6) ◽  
pp. 1061-1067 ◽  
Author(s):  
Robabeh Hajian ◽  
Shahram Tangestaninejad ◽  
Majid Moghadam ◽  
Valiollah Mirkhani ◽  
Iraj Mohammadpoor-Baltork
Keyword(s):  
Ionic Liquid ◽  
Ultrasonic Irradiation ◽  
Reusable Catalyst ◽  
Modified Silica ◽  
Epoxidation Of Alkenes
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