Redox Active Sodium Iodide/Recyclable Heterogeneous Solid Acid: An Efficient Dual Catalytic System for Electrochemically Oxidative α-C−H Thiocyanation and Sulfenylation of Ketones

2017 ◽  
Vol 360 (7) ◽  
pp. 1444-1452 ◽  
Author(s):  
Sen Liang ◽  
Cheng-Chu Zeng ◽  
Hong-Yu Tian ◽  
Bao-Guo Sun ◽  
Xu-Gang Luo ◽  
...  
Keyword(s):  
Catalytic System ◽  
Sodium Iodide ◽  
Solid Acid ◽  
Active Sodium ◽  
Redox Active ◽  
Heterogeneous Solid

Photocatalytic decarboxylative alkylations mediated by triphenylphosphine and sodium iodide

Science ◽  
2019 ◽  
Vol 363 (6434) ◽  
pp. 1429-1434 ◽  
Author(s):  
Ming-Chen Fu ◽  
Rui Shang ◽  
Bin Zhao ◽  
Bing Wang ◽  
Yao Fu
Keyword(s):  
Large Scale ◽  
Sodium Iodide ◽  
Organic Dyes ◽  
Industrial Processes ◽  
Enol Ethers ◽  
Light Emitting ◽  
Silyl Enol Ethers ◽  
Redox Active ◽  
Decarboxylative Coupling ◽  
The Cost

Most photoredox catalysts in current use are precious metal complexes or synthetically elaborate organic dyes, the cost of which can impede their application for large-scale industrial processes. We found that a combination of triphenylphosphine and sodium iodide under 456-nanometer irradiation by blue light–emitting diodes can catalyze the alkylation of silyl enol ethers by decarboxylative coupling with redox-active esters in the absence of transition metals. Deaminative alkylation using Katritzky’s N-alkylpyridinium salts and trifluoromethylation using Togni’s reagent are also demonstrated. Moreover, the phosphine/iodide-based photoredox system catalyzes Minisci-type alkylation of N-heterocycles and can operate in tandem with chiral phosphoric acids to achieve high enantioselectivity in this reaction.

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.

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.

scholarly journals Production of furfural from xylose and corn stover catalyzed by a novel porous carbon solid acid in γ-valerolactone

RSC Advances ◽  
2017 ◽  
Vol 7 (48) ◽  
pp. 29916-29924 ◽  
Author(s):  
Yuanshuai Zhu ◽  
Wenzhi Li ◽  
Yijuan Lu ◽  
Tingwei Zhang ◽  
Hasan Jameel ◽  
...  
Keyword(s):  
Corn Stover ◽  
Catalytic System ◽  
Porous Carbon ◽  
Solid Acid

An efficient catalytic system using S-RFC as catalyst was developed to produce furfural from xylose and corn stover in GVL.

Synthesis of spirooxindole derivatives catalyzed by GN/SO3H nanocomposite as a heterogeneous solid acid

2018 ◽  
Vol 44 (11) ◽  
pp. 6979-6993 ◽  
Author(s):  
Ali Allahresani ◽  
Bahare Taheri ◽  
M. A. Nasseri
Keyword(s):  
Solid Acid ◽  
Heterogeneous Solid

Halloysite nanotubes based heterogeneous solid acid catalysts

2020 ◽  
Vol 44 (30) ◽  
pp. 12897-12908
Author(s):  
Aman Mahajan ◽  
Princy Gupta
Keyword(s):  
Acid Catalysis ◽  
Solid Acid ◽  
Catalytic Performance ◽  
Halloysite Nanotubes ◽  
Solid Acids ◽  
Review Article ◽  
Solid Acid Catalysts ◽  
Acid Catalysts ◽  
Heterogeneous Solid ◽  
Excellent Catalytic Performance

Taking into account the excellent catalytic performance of halloysite nanotubes, the main focus of this review article is to unveil the research on halloysite nanotubes for the preparation of solid acids and their applications in acid catalysis.

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