Results 31 to 40 of about 26,334 (117)

Strain and Complexity, Passerini and Ugi Reactions of Four‐Membered Heterocycles and Further Elaboration of TOSMIC Product

ChemistryOpen, 2023
Straightforward and general Passerini and Ugi procedures have been developed to incorporate four‐membered heterocycles into highly functionalized scaffolds.
Gábor Sztanó, Dr. Zoltán Dobi, Dr. Tibor Soós   +2 more
doaj   +1 more source

Tandem Catalysis of an Aldol-‘Click’ Reaction System within a Molecular Hydrogel

Molecules, 2016
A heterogeneous supramolecular catalytic system for multicomponent aldol-‘click’ reactions is reported. The copper(I) metallohydrogel functionalized with a phenyltriazole fragment was able to catalyze the multicomponent reaction between phenylacetylene ...
Marco Araújo, Iván Muñoz Capdevila, Santiago Díaz-Oltra, Beatriu Escuder   +3 more
doaj   +1 more source

Multicomponent Hosomi–Sakurai Reaction on Isosorbide Derivatives

Molecules
Trimethylsilyl ethers of monoprotected isosorbide derivatives have been subjected to multicomponent Hosomi–Sakurai reactions with allyl trimethylsilane and various aldehydes (aromatic or aliphatic) under the catalysis of trimethylsilyl triflate.
Luca Banfi, Lucia Garcia de la Parte, Chiara Lambruschini, Lisa Moni, Daniel Rufo Perez, Renata Riva   +5 more
doaj   +1 more source

A practical two-step procedure for the preparation of enantiopure pyridines: Multicomponent reactions of alkoxyallenes, nitriles and carboxylic acids followed by a cyclocondensation reaction

Beilstein Journal of Organic Chemistry, 2011
A practical approach to highly functionalized 4-hydroxypyridine derivatives with stereogenic side chains in the 2- and 6-positions is described. The presented two-step process utilizes a multicomponent reaction of alkoxyallenes, nitriles and carboxylic ...
Christian Eidamshaus, Roopender Kumar, Mrinal K. Bera, Hans-Ulrich Reissig   +3 more
doaj   +1 more source

New synthetic method for the synthesis of 1,4-dihydropyridine using aminated multiwalled carbon nanotubes as high efficient catalyst and investigation of their antimicrobial properties

Journal of Saudi Chemical Society, 2018
Synthesis of 1,4-dihydropyridines in the presence of aminated multiwalled carbon nanotubes and investigation into their antimicrobial properties were carried out.Amino functionalized carbon nanotubes were prepared through a facile, clean and safe ...
Roya Mahinpour, Leila Moradi, Zohreh Zahraei, Nafiseh Pahlevanzadeh   +3 more
doaj   +1 more source

Síntese do monastrol e novos compostos de Biginelli promovida por In(OTf)3 Synthesis of monastrol and of new Biginelli compounds promoted by In(OTf)3

Química Nova, 2005
In this paper, we describe a practical route for the synthesis of Biginelli compounds using In(OTf)3. To study the generality of this catalyst, several examples using aromatic aldehydes, 1,3-dicarbonyl compounds, urea, and thiourea were investigated. The
Marla N. Godoi, Hellen S. Costenaro, Eliane Kramer, Paola S. Machado, Marcelo G. Montes D'Oca, Dennis Russowsky   +5 more
doaj   +1 more source

Novel Biopolymer-Based Catalyst for the Multicomponent Synthesis of N-aryl-4-aryl-Substituted Dihydropyridines Derived from Simple and Complex Anilines

Molecules
Although Hantzsch synthesis has been an established multicomponent reaction method for more than a decade, its derivative, whereby an aniline replaces ammonium acetate as the nitrogen source, has not been explored at great length.
Giovanna Bosica, Roderick Abdilla
doaj   +1 more source

A general A³: coupling reaction based on functionalized alkynes

Química Nova, 2013
A range of hydroxypropargylpiperidones were efficiently obtained by a one-pot three-component coupling reaction of aldehydes, alkynols, and a primary amine equivalent (4-piperidone hydrochloride hydrate) in ethyl acetate using copper(I) chloride as a ...
Edison P. Wendler, Alcindo A. Dos Santos
doaj   +1 more source

Copper-Catalyzed Four-Component A³-Based Cascade Reaction: Facile Synthesis of 3-Oxetanone-Derived Spirocycles

Chemistry
3-Oxetanone-derived spirooxazolidines represent a class of building blocks for accessing diverse saturated heterocycles, but their synthetic methods remain unexplored.
Rongkang Zhang, Liliang Huang, Aiguo Gu, Huangdi Feng   +3 more
doaj   +1 more source

In Silico and in Vitro Studies of Fluorinated Chroman-2-Carboxilic Acid Derivatives as an Anti-tubercular Agent

Folia Medica, 2018
Background: Despite the use of traditional method, Ugi reaction currently is a well-established multicomponent reaction. Chromane motif itself possesses a variety of biological functions.
Kapadiya Khushal M., Jadeja Yashwantsinh S., Banik Avishek, Khunt Ranjan C.   +3 more
doaj   +1 more source