Nanomagnetic zirconia-based sulfonic acid (Fe3O4@ZrO2-Pr-SO3H): a new, efficient and recyclable solid acid catalyst for the protection of alcohols via HMDS under solvent free conditions

RSC Advances ◽  
2016 ◽  
Vol 6 (68) ◽  
pp. 63480-63487 ◽  
Author(s):  
Azadeh Tadjarodi ◽  
Rahim Khodikar ◽  
Hosssein Ghafuri
Keyword(s):  
Sulfonic Acid ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Solvent Free ◽  
Solvent Free Conditions

In the present work, sulfonic acid functionalized nanomagnetic zirconia is prepared by the reaction of (3-mercaptopropyl)trimethoxysilane and nanomagnetic zirconia.

Phospho sulfonic acid: an efficient and recyclable solid acid catalyst for the solvent-free synthesis of α-hydroxyphosphonates and their anticancer properties

2015 ◽  
Vol 39 (5) ◽  
pp. 3916-3922 ◽  
Author(s):  
Reddi Mohan Naidu Kalla ◽  
Hye Ri Lee ◽  
Jiafu Cao ◽  
Jin-Wook Yoo ◽  
Il Kim
Keyword(s):  
Anticancer Activity ◽  
Sulfonic Acid ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Solvent Free ◽  
Green Protocol ◽  
Anticancer Properties ◽  
Solvent Free Synthesis

Some of the title compounds synthesized by a green protocol showed potent anticancer activity.

scholarly journals Phospho sulfonic acid: A novel and efficient solid acid catalyst for the one-pot preparation of 2H-indazolo[2,1-b]-phthalazine-triones

2013 ◽  
Vol 78 (4) ◽  
pp. 469-476 ◽  
Author(s):  
Reza Kiasat ◽  
Arash Mouradezadegun ◽  
Jafar Saghanezhad
Keyword(s):  
Sulfonic Acid ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Catalytic Amount ◽  
One Pot ◽  
Solvent Free Conditions ◽  
Three Component Reaction ◽  
The One ◽  
Short Time

The efficient one-pot condensation of aldehyde, dimedone, and phthalhydrazide has been achieved in the presence of a catalytic amount of phospho sulfonic acid as a novel environmentally benign heterogeneous solid acid under solvent-free conditions. A diversified 2H-indazolo[1,2-b]phthalazinetrione derivatives were prepared in good to excellent yields in short time. The economical factors (time, cost, waste etc.) for this three-component reaction hold promise for the future of organic synthesis.

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