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Microwave Assisted Sol-Gel Synthesis of MgO Nanoparticles and Their Catalytic Activity in the Synthesis of Hantzsch 1,4-Dihydropyridines（图）
magnesium oxide microwave-assisted sol-gel method nanoparticle Hantzsch 1,4-dihydropyridine
2013/10/5
A microwave-assisted sol-gel method was employed for the preparetion of nano-sized MgO particles using Mg(NO3)2·6H2O as precursor and deionized water as solvent. The sample calcined at 500 °C had a hi...
Cobalt Nanoparticles Promoted Highly Efficient One Pot Four-Component Synthesis of 1,4-Dihydropyridines under Solvent-Free Conditions（图）
cobalt nanoparticle 1,4-dihydropyridine four-component condensation heterogeneou catalyst magnetically separable catalyst
2013/10/10
A straightforward and general method has been developed for the synthesis of C5-unsubstitiuted 1,4-dihydropyridines by a reaction using dimedone, acetophenone, aromatic aldehydes, and ammonium acetate...
Silica Sulfuric Acid: An Efficient Heterogeneous Catalyst for the One-Pot Synthesis of 1,4-Dihydropyridines under Mild and Solvent-Free Conditions（图）
aldehyde ethyl acetoacetate ammonium acetate silica sulfuric acid 1,4-dihydropyridine
2013/10/12
A series of 1,4-dihydropyridines have been prepared by a one-pot condensation of aldehydes, ethyl acetoacetate, and ammonium acetate in the presence of a heterogeneous catalyst silica sulfuric acid at...
Sulfonic acid-functionalized silica: a remarkably efficient heterogeneous reusable catalyst for the one-pot synthesis of 1,4-dihydropyridines
1,4-Dihydropyridine b-dicarbonyl compounds solid acid SiO2-R-SO3H
2010/10/19
An efficient one-pot method for the synthesis of 1,4-dihydropyridines from b-dicarbonyl compounds, aldehyde, and ammonium acetate is reported using sulfonic acid-functionalized silica at 90 °C under s...
An efficient one pot synthesis of 1,4-dihydropyridines using alumina sulfuric acid (ASA) catalyst
Hantzsch 1 4-dihydropyridines ASA catalyst one pot conversion
2010/4/8
An efficient synthetic method for 1,4-dihydropyridines has been developed using 3 or 4 component condensation reactions of aldehydes, 1,3-dicarbonyl compounds, and ammonium acetate in the presence of ...