Polymer supported DMAP: an easily recyclable organocatalyst for highly atom-economical Henry reaction under solvent-free conditions

RSC Advances ◽  
2016 ◽  
Vol 6 (106) ◽  
pp. 104154-104163 ◽  
Author(s):  
Diparjun Das ◽  
Gunindra Pathak ◽  
Lalthazuala Rokhum
Keyword(s):  
Supported Catalysts ◽  
Heterogeneous Systems ◽  
Solvent Free ◽  
Henry Reaction ◽  
Homogeneous Catalysts ◽  
Solvent Free Conditions ◽  
Simple Filtration ◽  
Polymer Supported

Polymer supported catalysts are regarded as a borderline class of catalysts, which retains the advantages of homogeneous catalysts while securing the ease of recovery by simple filtration and workup of heterogeneous systems.

Ethyl acrylate conjugated polystyryl-diphenylphosphine — An extremely efficient catalyst for Henry reaction under solvent-free conditions (SolFC)

2013 ◽  
Vol 91 (4) ◽  
pp. 300-306 ◽  
Author(s):  
Lalthazuala Rokhum ◽  
Ghanashyam Bez
Keyword(s):  
Ethyl Acrylate ◽  
Solid Support ◽  
Solvent Free ◽  
Stoichiometric Ratio ◽  
Henry Reaction ◽  
Efficient Catalyst ◽  
Fast Growing ◽  
Solvent Free Conditions ◽  
Polymer Supported

Over the last few decades, the fast-growing development of polymer supported reagents has led to the synthesis of a variety of reagents on solid support. Some of the major advantages of using such reagents are that they are less hygroscopic, easy to recover, and can be recycled. Here, we have demonstrated that in situ generated ethyl acrylate conjugated polystyryl-diphenylphosphine (PDPP–EA) derived from the reaction of a mixture of polystyryl-diphenylphosphine and ethyl acrylate in a stoichiometric ratio can efficiently catalyze the synthesis of β-nitroalcohols from the reaction of aldehydes and nitroalkanes under solvent-free conditions (SolFC).

Zr(HSO4)4/SiO2 as an Efficient Alternative Catalyst for the Claisen-Schmidt Condensation

2008 ◽  
Vol 63 (12) ◽  
pp. 1421-1424 ◽  
Author(s):  
Bi Bi Fatemeh Mirjalilia ◽  
Abddhamid Bamoniri ◽  
Masoumeh Alipour ◽  
Mohammad Ali Karimi Zarchia
Keyword(s):  
Aromatic Aldehydes ◽  
Solvent Free ◽  
Solvent Free Conditions ◽  
Simple Filtration ◽  
Efficient Alternative ◽  
Work Up

Zr(HSO4)4/SiO2 promotes the regio-, stereo- and chemoselective Claisen-Schmidt condensation of aromatic aldehydes with ketones under solvent-free conditions with improved yields. The work-up of the reaction mixture is simple, and the catalyst is easily removed from the products by simple filtration.

A Merrifield resin supported Pd–NHC complex with a spacer(Pd–NHC@SP–PS) for the Sonogashira coupling reaction under copper- and solvent-free conditions

2015 ◽  
Vol 39 (3) ◽  
pp. 2333-2341 ◽  
Author(s):  
Sanjay N. Jadhav ◽  
Arjun S. Kumbhar ◽  
Sawanta S. Mali ◽  
Chang Kook Hong ◽  
Rajashri S. Salunkhe
Keyword(s):  
Coupling Reaction ◽  
Cross Coupling ◽  
Solvent Free ◽  
Sonogashira Coupling ◽  
Cross Coupling Reaction ◽  
Solvent Free Conditions ◽  
Sonogashira Coupling Reaction ◽  
Merrifield Resin ◽  
Polymer Supported ◽  
Supported Pd

Synthetic applications of a polymer supported air-stable palladium NHC complex with a spacer (catalyst6, Pd–NHC@SP–PS) and without a spacer (catalyst7, Pd–NHC@PS) have been studied for the Sonogashira cross-coupling reaction.

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