Tandem Oxidative Pudovik Reaction Using Fe 3 O 4 @SiO 2 ‐Metformin‐Cu ( II ) as an Efficient and Recoverable Catalyst

2020 ◽  
Vol 5 (14) ◽  
pp. 4263-4266 ◽  
Author(s):  
Sahar Babazadeh ◽  
Maryam Kazemi Miraki ◽  
Farzane Pazoki ◽  
Akbar Heydari
Keyword(s):  
Pudovik Reaction ◽  
Recoverable Catalyst

Cu-Fe Spinels: First Heterogeneous and Magnetically Recoverable Catalyst for the Ferrier Rearrangement of 2-Nitroglycals

2019 ◽  
Vol 16 (6) ◽  
pp. 447-453 ◽  
Author(s):  
Leticia Lafuente ◽  
María Florencia Rochetti ◽  
Rodolfo Bravo ◽  
Leandro Sasiambarrena ◽  
Cintia C. Santiago ◽  
...  
Keyword(s):  
Reaction Products ◽  
External Magnet ◽  
Recoverable Catalyst ◽  
Ferrier Rearrangement ◽  
Magnetically Recoverable Catalyst

Cu-Fe spinels promoted the Ferrier rearrangement of 2-nitroglycals with several O-nucleophiles. 2,3-Unsaturated carbohydrate derivatives were prepared by the reaction of 3,4,6-tri-Oacetyl- 2-nitroglucal and alcohols in the presence of 5 % of CuFe2O4. After separation of the catalyst with an external magnet, the reaction products were obtained in good yields and high stereo and regioselectivity. Also, S- and heterocyclic C-3 substituted 2-nitro-endo-glycals could be prepared by this method.

Efficient Conversion of Cellulose to Glucose, Levulinic Acid, and Other Products in Hot Water Using SO2 as a Recoverable Catalyst

2012 ◽  
Vol 51 (47) ◽  
pp. 15503-15508 ◽  
Author(s):  
Weina Liu ◽  
Yucui Hou ◽  
Weize Wu ◽  
Zhenyu Liu ◽  
Qingya Liu ◽  
...  
Keyword(s):  
Levulinic Acid ◽  
Hot Water ◽  
Efficient Conversion ◽  
Recoverable Catalyst

Lewis Acid-Promoted Suzuki Reaction using Palladium Chloride Anchored on a Polymer as a Catalyst

2008 ◽  
Vol 61 (8) ◽  
pp. 610 ◽  
Author(s):  
Guozhi Fan ◽  
Hanjun Zhang ◽  
Siqing Cheng ◽  
Zhandong Ren ◽  
Zhijun Hu ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Lewis Acid ◽  
Lewis Acids ◽  
Heterogeneous Catalysts ◽  
Suzuki Reaction ◽  
Cross Coupling ◽  
Palladium Chloride ◽  
Coupling Reactions ◽  
Cross Coupling Reactions ◽  
Recoverable Catalyst

Palladium chloride anchored on polystyrene modified by 5-amino-1,10-phenanthroline was prepared and used as an efficient recoverable catalyst for Suzuki cross-coupling reactions. The heterogeneous catalysts can be easily separated from the reaction mixture and reused for five cycles without significant Pd leaching and loss of catalytic activity. Rate enhancement in the Suzuki reaction by Lewis acids was also studied.

scholarly journals Pyridine-Functionalized MCM-41 as an Efficient and Recoverable Catalyst for the Synthesis of Pyran Annulated Heterocyclic Systems

2010 ◽  
Vol 58 (2) ◽  
pp. 270-272 ◽  
Author(s):  
Ahmad Shaabani ◽  
Mostafa Mohammadpour Amini ◽  
Sabrieh Ghasemi ◽  
Rahim Ghadari ◽  
Ali Hossein Rezayan ◽  
...  
Keyword(s):  
Recoverable Catalyst ◽  
Mcm 41

scholarly journals Magnetically recoverable nanostructured Pd complex of dendrimeric type ligand on the MCM-41: Preparation, characterization and catalytic activity in the Heck reaction

2020 ◽  
Vol 43 (1) ◽  
pp. 184-199
Author(s):  
Mohammad Abdollahi-Alibeik ◽  
Najmeh Gharibpour ◽  
Zahra Ramazani
Keyword(s):  
Heck Reaction ◽  
Palladium Complex ◽  
Nanostructured Material ◽  
Magnetic Core ◽  
Aryl Halides ◽  
Heterogeneous Samples ◽  
Recoverable Catalyst ◽  
Ft Ir ◽  
Magnetically Recoverable Catalyst ◽  
Mcm 41

AbstractA palladium complex of a dendrimer type ligand of aminoethylacrylamide immobilized onto the mesoporous channels of MCM-41 with magnetic core was prepared and characterized using various techniques such as XRD, TEM, BET, FT-IR, TGA, and VSM. The prepared nanostructured material was found as a magnetically recoverable catalyst for Heck reaction of aryl halides and vinylic C–H. The catalyst is easily recoverable with an external magnet and is reusable with different leaching amounts depending to loading of Pd. A hot filtration test was also performed and gave evidence that Palladium in heterogeneous samples can dissolve and then redeposit on the surface of the support material.

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