Acetalization of aldehydes and ketones over H4[SiW12O40] and H4[SiW12O40]/SiO2

2014 ◽  
Vol 4 (8) ◽  
pp. 2618-2625 ◽  
Author(s):  
Shen Zhao ◽  
Yueqing Jia ◽  
Yu-Fei Song
Keyword(s):  
Catalytic Activity ◽  
Solvent Free ◽  
Solvent Free Conditions ◽  
Aldehydes And Ketones

A Keggin cluster of H4[SiW12O40] (H-SiW12) has been developed to catalyze the acetalization of aldehydes and ketones under solvent-free conditions, and could be recycled at least ten times without an obvious decrease in catalytic activity.

A Mesoporous ErIII-MCM-41 Catalyst for the Cyanosilylation of Aldehydes and Ketones under Solvent-free Conditions

ChemSusChem ◽  
2008 ◽  
Vol 1 (11) ◽  
pp. 916-919 ◽  
Author(s):  
Antonio Procopio ◽  
Gobind Das ◽  
Monica Nardi ◽  
Manuela Oliverio ◽  
Luigi Pasqua
Keyword(s):  
Solvent Free ◽  
Solvent Free Conditions ◽  
Aldehydes And Ketones ◽  
Mcm 41

Mixed er-NHC/phosphine Pd(ii) complexes and their catalytic activity in the Buchwald–Hartwig reaction under solvent-free conditions

2019 ◽  
Vol 48 (10) ◽  
pp. 3447-3452 ◽  
Author(s):  
Alexandra A. Ageshina ◽  
Grigorii K. Sterligov ◽  
Sergey A. Rzhevskiy ◽  
Maxim A. Topchiy ◽  
Gleb A. Chesnokov ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Solvent Free ◽  
Secondary Amines ◽  
Solvent Free Conditions ◽  
Primary And Secondary Amines

A single catalyst for solvent-free Buchwald–Hartwig amination with both primary and secondary amines.

scholarly journals N-Hydroxyphthalimide Supported on Silica Coated with Ionic Liquids Containing CoCl2 (SCILLs) as New Catalytic System for Solvent-Free Ethylbenzene Oxidation

Catalysts ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 252 ◽  
Author(s):  
Gabriela Dobras ◽  
Kornela Kasperczyk ◽  
Sebastian Jurczyk ◽  
Beata Orlińska
Keyword(s):  
Catalytic Activity ◽  
Ionic Liquids ◽  
Fold Increase ◽  
Solvent Free ◽  
High Catalytic Activity ◽  
Ethylbenzene Oxidation ◽  
Solvent Free Conditions ◽  
Ft Ir ◽  
Tga Analysis ◽  
Ft Ir Spectroscopy

N-Hydroxyphthalimide was immobilized via ester bond on commercially available silica gel (SiOCONHPI) and then coated with various ionic liquids containing dissolved CoCl2 (SiOCONHPI@CoCl2@IL). New catalysts were characterized by means of FT IR spectroscopy, elemental analysis, SEM and TGA analysis and used in ethylbenzene oxidation with oxygen under mild solvent-free conditions (80 °C, 0.1 MPa). High catalytic activity of SiOCONHPI was proved. In comparison to a non-catalytic reaction, a two-fold increase in conversion of ethylbenzene was observed (from 4.7% to 8.6%). Coating of SiOCONHPI with [bmim][OcOSO3], [bmim][Cl] and [bmim][CF3SO3] containing CoCl2 enabled to increase the catalytic activity in relation to systems in which IL and CoCl2 were added directly to reaction mixture. The highest conversion of ethylbenzene was obtained while SiOCONHPI@CoCl2@[bmim][OcOSO3] were used (12.1%). Catalysts recovery and reuse was also studied.

ChemInform Abstract: The Catalytic Activity of Titania Nanostructures in the Synthesis of Amides under Solvent-Free Conditions.

ChemInform ◽  
2012 ◽  
Vol 43 (44) ◽  
pp. no-no
Author(s):  
Sangaraiah Nagarajan ◽  
Park Ran ◽  
Poovan Shanmugavelan ◽  
Murugan Sathishkumar ◽  
Alagusundaram Ponnuswamy ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Solvent Free ◽  
Solvent Free Conditions ◽  
Titania Nanostructures

The catalytic activity of titania nanostructures in the synthesis of amides under solvent-free conditions

2012 ◽  
Vol 36 (6) ◽  
pp. 1312 ◽  
Author(s):  
Sangaraiah Nagarajan ◽  
Park Ran ◽  
Poovan Shanmugavelan ◽  
Murugan Sathishkumar ◽  
Alagusundaram Ponnuswamy ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Solvent Free ◽  
Solvent Free Conditions ◽  
Titania Nanostructures

Preparation, characterization and application of succinimidinium hydrogensulfate ([H-Suc]HSO4) as an efficient ionic liquid catalyst for the N-Boc protection of amines

RSC Advances ◽  
2015 ◽  
Vol 5 (26) ◽  
pp. 19790-19798 ◽  
Author(s):  
Farhad Shirini ◽  
Omid Goli Jolodar ◽  
Mohadeseh Seddighi ◽  
Hojatollah Takbiri Borujeni
Keyword(s):  
Ionic Liquid ◽  
Catalytic Activity ◽  
Sulfuric Acid ◽  
Solvent Free ◽  
Solvent Free Conditions

Succinimidinium hydrogensulfate ([H-Suc]HSO4), which is prepared from the reaction of succinimide and sulfuric acid, showed excellent catalytic activity for the N-Boc protection of various amines under solvent free conditions.

scholarly journals LiHSO4/SiO2as a New, Efficient and Reusable Catalytic System for the Chemoselective Conversion of Aldehydes to Acylals under Solvent-Free Conditions

2009 ◽  
Vol 6 (s1) ◽  
pp. S390-S396 ◽  
Author(s):  
Abdolkarim Zare ◽  
Alireza Hasaninejad ◽  
Esmael Rostami ◽  
Ahmad Reza Moosavi-Zare ◽  
Maria Merajoddin ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Acetic Anhydride ◽  
Catalytic System ◽  
Catalytic Amount ◽  
Significant Loss ◽  
Solvent Free ◽  
Reaction Conditions ◽  
Highly Efficient ◽  
Solvent Free Conditions

A highly efficient, green and expeditious solvent-free method is described for the chemoselective conversion of aldehydes to the corresponding acylals in excellent yields, using acetic anhydride in the presence of catalytic amount (20 mol%) of silica-supported LiHSO4. Ketones does not react under these reaction conditions. LiHSO4/SiO2can be recovered and reused without any significant loss of its catalytic activity.

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