Covalently anchored sulfamic acid on cellulose as heterogeneous solid acid catalyst for the synthesis of structurally symmetrical and unsymmetrical 1,4-dihydropyridine derivatives

2017 ◽  
Vol 41 (12) ◽  
pp. 5133-5141 ◽  
Author(s):  
Shrikrishna Karhale ◽  
Chandrakant Bhenki ◽  
Gajanan Rashinkar ◽  
Vasant Helavi
Keyword(s):  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Sulfamic Acid ◽  
Acid Catalyst ◽  
Covalent Grafting ◽  
Heterogeneous Solid ◽  
Dihydropyridine Derivatives

A novel heterogeneous solid acid catalyst has been prepared by covalent grafting of chlorosulphonic acid on amino-functionalized cellulose (Cell–Pr-NHSO3H).

Melamine trisulfonic acid (MTSA): an efficient and recyclable heterogeneous catalyst in green organic synthesis

RSC Advances ◽  
2015 ◽  
Vol 5 (110) ◽  
pp. 90819-90837 ◽  
Author(s):  
Rajesh H. Vekariya ◽  
Kinjal D. Patel ◽  
Hitesh D. Patel
Keyword(s):  
Heterogeneous Catalyst ◽  
Organic Synthesis ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Organic Transformations ◽  
Highly Efficient ◽  
Recyclable Heterogeneous Catalyst ◽  
Melamine Trisulfonic Acid ◽  
Heterogeneous Solid

Melamine trisulfonic acid (MTSA) as a highly efficient heterogeneous solid acid catalyst catalyzes various organic transformations.

Sulfamic Acid: An Efficient, Cost-Effective and Recyclable Solid Acid Catalyst for the Friedlander Quinoline Synthesis.

ChemInform ◽  
2006 ◽  
Vol 37 (5) ◽  
Author(s):  
J. S. Yadav ◽  
P. Purushothama Rao ◽  
D. Sreenu ◽  
R. Srinivasa Rao ◽  
V. Naveen Kumar ◽  
...  
Keyword(s):  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Sulfamic Acid ◽  
Acid Catalyst ◽  
Cost Effective

TiO2-coated magnetite nanoparticle-supported sulfonic acid as a new, efficient, magnetically separable and reusable heterogeneous solid acid catalyst for multicomponent reactions

RSC Advances ◽  
2015 ◽  
Vol 5 (57) ◽  
pp. 45974-45982 ◽  
Author(s):  
Ali Amoozadeh ◽  
Sanaz Golian ◽  
Salman Rahmani
Keyword(s):  
Magnetite Nanoparticles ◽  
Sulfonic Acid ◽  
Multicomponent Reactions ◽  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Acid Catalyst ◽  
Magnetite Nanoparticle ◽  
Magnetically Separable ◽  
Heterogeneous Solid

TiO2-coated magnetite nanoparticles-supported sulfonic acid (nano-Fe3O4–TiO2–SO3H (n-FTSA)) is synthesized by the immobilization of –SO3H groups on the surface of nano-Fe3O4–TiO2.

Sulfamic acid: an efficient and recyclable solid acid catalyst for the synthesis of 4,5-dihydropyrrolo[1,2-a]quinoxalines

2015 ◽  
Vol 56 (31) ◽  
pp. 4619-4622 ◽  
Author(s):  
Ahmed Kamal ◽  
Korrapati Suresh Babu ◽  
S.M. Ali Hussaini ◽  
P.S. Srikanth ◽  
Moku Balakrishna ◽  
...  
Keyword(s):  
Solid Acid ◽  
Solid Acid Catalyst ◽  
Sulfamic Acid ◽  
Acid Catalyst
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