Polymer (PVP) supported ferric chloride: an efficient and recyclable heterogeneous catalyst for high yield synthesis of 1,5-benzodiazepine derivatives under solvent free conditions and microwave irradiation

2005 ◽  
Vol 6 (1) ◽  
pp. 67-70 ◽  
Author(s):  
M. Adharvana Chari ◽  
K. Syamasundar
Keyword(s):  
Microwave Irradiation ◽  
Heterogeneous Catalyst ◽  
Ferric Chloride ◽  
Solvent Free ◽  
High Yield ◽  
Solvent Free Conditions ◽  
Benzodiazepine Derivatives ◽  
Recyclable Heterogeneous Catalyst

H-β-zeolite catalyzed transamidation of carboxamides, phthalimide, formamides and thioamides with amines under neat conditions

RSC Advances ◽  
2015 ◽  
Vol 5 (115) ◽  
pp. 95313-95317 ◽  
Author(s):  
Sadu Nageswara Rao ◽  
Darapaneni Chandra Mohan ◽  
Subbarayappa Adimurthy
Keyword(s):  
Heterogeneous Catalyst ◽  
Solvent Free ◽  
Β Zeolite ◽  
Solvent Free Conditions ◽  
Recyclable Heterogeneous Catalyst

Efficient transamidation of unactivated carboxamides, phthalimides, formamides and thioamides with amines under solvent-free conditions using H-β-zeolite as a green and recyclable heterogeneous catalyst is described.

An efficient method for the silylation of hydroxyl groups with hexamethyldisilazane (HMDS) catalyzed by aluminum tris(dihydrogen phosphate) under solvent-free and ambient conditions

2008 ◽  
Vol 86 (8) ◽  
pp. 841-845 ◽  
Author(s):  
Hamid Reza Shaterian ◽  
Majid Ghashang ◽  
Nassrin Tajbakhsh Riki ◽  
Manijeh Asadi
Keyword(s):  
Heterogeneous Catalyst ◽  
Efficient Method ◽  
Room Temperature ◽  
Solvent Free ◽  
Dihydrogen Phosphate ◽  
Hydroxyl Groups ◽  
Ambient Conditions ◽  
Solvent Free Conditions ◽  
Free Hydroxyl ◽  
Recyclable Heterogeneous Catalyst

A highly efficient and mild procedure for the trimethylsilylation of a wide variety of alcohols, including primary, benzylic, secondary, hindered secondary, tertiary, phenols, and oximes with hexamethyldisilazane (HMDS), using Al(H2PO4)3 as a recyclable heterogeneous catalyst at room temperature in a few minutes with excellent yields under solvent-free conditions is described.Key words: trimethylsilylation, hexamethyldisilazane, aluminum tris(dihydrogen phosphate) [Al(H2PO4)3], solvent-free, hydroxyl groups.

A sulfonated Schiff base dimethyltin(iv) coordination polymer: synthesis, characterization and application as a catalyst for ultrasound- or microwave-assisted Baeyer–Villiger oxidation under solvent-free conditions

RSC Advances ◽  
2016 ◽  
Vol 6 (81) ◽  
pp. 78225-78233 ◽  
Author(s):  
Luísa M. D. R. S. Martins ◽  
Susanta Hazra ◽  
M. Fátima C. Guedes da Silva ◽  
Armando J. L. Pombeiro
Keyword(s):  
Schiff Base ◽  
Coordination Polymer ◽  
Microwave Irradiation ◽  
Heterogeneous Catalyst ◽  
Polymer Synthesis ◽  
Solvent Free ◽  
Microwave Assisted ◽  
Solvent Free Conditions ◽  
Villiger Oxidation ◽  
Efficient Heterogeneous Catalyst

The sulfonated Schiff base dimethyltin(iv) coordination polymer is an efficient heterogeneous catalyst for the peroxidative Baeyer–Villiger oxidation of ketones, under ultrasound or microwave irradiation and solvent- and additive-free conditions.

scholarly journals One Pot, Solvent-Free Synthesis of Substituted 3,4-Dihydropyrimidin-2(1H)-Ones/Thiones under Microwave Irradiation (CEM) Using Reusable Nickel Nanoparticles

2015 ◽  
Vol 50 ◽  
pp. 17-25 ◽  
Author(s):  
Mayur K. Vekariya ◽  
Rajesh H. Vekariya ◽  
Nirav N. Barot ◽  
Tauhid A. Shaikh ◽  
Harjinder Kaur ◽  
...  
Keyword(s):  
Microwave Irradiation ◽  
Nickel Nanoparticles ◽  
Condensation Reaction ◽  
Solvent Free ◽  
High Yield ◽  
One Pot ◽  
Mass Spectral ◽  
Keto Esters ◽  
Aryl Aldehydes ◽  
Solvent Free Conditions

A library of 3,4-dihydropyrimidin-2(1H)-ones/thiones derivatives were synthesized via Biginelli condensation reaction of β-keto esters, aryl aldehydes and urea/thiourea under solvent-free conditions utilizing nickel nanoparticles under microwave irradiation (CEM Discover). The structures of the all compounds were elucidated with the aid of elemental analysis, IR, 1H-NMR and Mass spectral data. Nickel nanoparticles can be recovered and reused five times without loss of their efficiency. Short reaction time, high yield of products and simple workup procedure, solvent-free conditions and reusability of the catalyst are the superior features of this protocol.

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