scholarly journals Direct synthesis of amides and imines by dehydrogenative homo or cross-coupling of amines and alcohols catalyzed by Cu-MOF

RSC Advances ◽  
2021 ◽  
Vol 11 (34) ◽  
pp. 20788-20793
Author(s):  
Soheil Zamani Anbardan ◽  
Javad Mokhtari ◽  
Ahmad Yari ◽  
Abolfazl Hassani Bozcheloei
Keyword(s):  
Heterogeneous Catalyst ◽  
Room Temperature ◽  
Direct Synthesis ◽  
Cross Coupling ◽  
Recyclable Heterogeneous Catalyst

Oxidative dehydrogenative homo or cross-coupling of amines with alcohols to imines and amides was achieved with high to moderate yields at room temperature using Cu-MOF as an efficient and recyclable heterogeneous catalyst.

Efficient synthesis of pyrido[2,3-d]pyrimidine-7-carboxylic acids catalyzed by a TiO2/SiO2 nanocomposite in aqueous media at room temperature

2018 ◽  
Vol 73 (9) ◽  
pp. 641-645 ◽  
Author(s):  
Sepehr Sadegh-Samiei ◽  
Shahrzad Abdolmohammadi
Keyword(s):  
Heterogeneous Catalyst ◽  
Carboxylic Acids ◽  
Room Temperature ◽  
Aqueous Media ◽  
Reaction Times ◽  
Molar Ratio ◽  
Efficient Synthesis ◽  
Reaction Conditions ◽  
Moderate Reaction ◽  
Recyclable Heterogeneous Catalyst

AbstractA novel and efficient synthesis of eight 5-aryl-1,3-dimethyl-2,4-dioxo-1,2,3,4,5,8-hexahydropyrido[2,3-d]pyrimidine-7-carboxylic acids using a TiO2/SiO2 nanocomposite with a molar ratio of 1:1 as a recyclable heterogeneous catalyst is described. The desired products, five of which are new, are formed in short reaction times (2–3 h) with high to excellent yields (94%–98%) under very moderate reaction conditions (room temperature, aqueous media).

scholarly journals A New Heterogeneous Catalyst Obtained via Supramolecular Decoration of Graphene with a Pd2+ Azamacrocyclic Complex

Molecules ◽  
2019 ◽  
Vol 24 (15) ◽  
pp. 2714 ◽  
Author(s):  
Matteo Savastano ◽  
Paloma Arranz-Mascarós ◽  
Maria Paz Clares ◽  
Rafael Cuesta ◽  
Maria Luz Godino-Salido ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Self Assembly ◽  
Room Temperature ◽  
Coupling Reaction ◽  
Cross Coupling ◽  
Assembly Process ◽  
Efficient Catalyst ◽  
Mild Conditions ◽  
Cross Coupling Reaction ◽  
Green Procedure

A new G-(H2L)-Pd heterogeneous catalyst has been prepared via a self-assembly process consisting in the spontaneous adsorption, in water at room temperature, of a macrocyclic H2L ligand on graphene (G) (G + H2L = G-(H2L)), followed by decoration of the macrocycle with Pd2+ ions (G-(H2L) + Pd2+ = G-(H2L)-Pd) under the same mild conditions. This supramolecular approach is a sustainable (green) procedure that preserves the special characteristics of graphene and furnishes an efficient catalyst for the Cu-free Sonogashira cross coupling reaction between iodobenzene and phenylacetylene. Indeed, G-(H2L)-Pd shows an excellent conversion (90%) of reactants into diphenylacetylene under mild conditions (50 °C, water, aerobic atmosphere, 14 h). The catalyst proved to be reusable for at least four cycles, although decreasing yields down to 50% were observed.

Graphene oxide–TiO2 composite: an efficient heterogeneous catalyst for the green synthesis of pyrazoles and pyridines

2016 ◽  
Vol 40 (6) ◽  
pp. 5053-5060 ◽  
Author(s):  
Shweta Kumari ◽  
Amiya Shekhar ◽  
Devendra D. Pathak
Keyword(s):  
Graphene Oxide ◽  
Green Synthesis ◽  
Aqueous Medium ◽  
Heterogeneous Catalyst ◽  
Room Temperature ◽  
Highly Efficient ◽  
Recyclable Heterogeneous Catalyst ◽  
Efficient Heterogeneous Catalyst

GO–TiO2 has been found to be a highly efficient and recyclable heterogeneous catalyst for the synthesis of pyrazoles and pyridines in aqueous medium at room temperature.

scholarly journals Superparamagnetic nanoparticles as a recyclable catalyst: a new access to phenol esters via cross dehydrogenative coupling reactions

RSC Advances ◽  
2017 ◽  
Vol 7 (88) ◽  
pp. 55756-55766 ◽  
Author(s):  
Chung K. Nguyen ◽  
Hoang H. Vu ◽  
Ha V. Dang ◽  
Ngon N. Nguyen ◽  
Nhan T. H. Le ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Direct Synthesis ◽  
Recyclable Catalyst ◽  
Superparamagnetic Nanoparticles ◽  
Coupling Reactions ◽  
Chemical Structures ◽  
Dehydrogenative Coupling ◽  
Recyclable Heterogeneous Catalyst

CuFe2O4 superparamagnetic nanoparticles were utilized as a recyclable heterogeneous catalyst for the direct synthesis of chemical structures containing both phenol ester and benzothiazole moieties via cross dehydrogenative coupling reactions.

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.

scholarly journals Textile-supported silver nanoparticles as a highly efficient and recyclable heterogeneous catalyst for nitroaromatic reduction at room temperature

RSC Advances ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 6288-6292 ◽  
Author(s):  
Wei Feng ◽  
Tingting Huang ◽  
Liqian Gao ◽  
Xianfeng Yang ◽  
Wenbin Deng ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Heterogeneous Catalyst ◽  
Room Temperature ◽  
Highly Efficient ◽  
Excellent Activity ◽  
Recyclable Heterogeneous Catalyst

A novel textile-supported nanosilver (TsNS) catalyst was prepared and applied in nitroaromatic reduction with excellent activity, stability and recyclability.

Cu(ii) anchored nitrogen-rich covalent imine network (CuII-CIN-1): an efficient and recyclable heterogeneous catalyst for the synthesis of organoselenides from aryl boronic acids in a green solvent

RSC Advances ◽  
2014 ◽  
Vol 4 (86) ◽  
pp. 46075-46083 ◽  
Author(s):  
Susmita Roy ◽  
Tanmay Chatterjee ◽  
Biplab Banerjee ◽  
Noor Salam ◽  
Asim Bhaumik ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Cross Coupling ◽  
Boronic Acids ◽  
Coupling Reactions ◽  
Green Solvent ◽  
Cross Coupling Reactions ◽  
Recyclable Heterogeneous Catalyst

A Cu(ii)-grafted covalent imine framework material has been designed, which catalyzes the C–Se cross-coupling reactions to obtain a library of organoselenides.

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