Results 21 to 30 of about 95,350 (343)

Versatile Microwave-Assisted and Lanthanum Chloride Catalysed Synthesis of Polysubstituted Imidazoles Using Urea/Thiourea as Benign Source of Ammonia

E-Journal of Chemistry, 2012
Lanthanum chloride was found to be an effective catalyst for the facile and one-pot synthesis of polysubstituted imidazoles under solvent free condition in excellent yields.
Mohammad Reza Manafi, Pedram Manafi, Mohammad Reza Kalaee   +2 more
doaj   +1 more source

The Reaction of Aminonitriles with Aminothiols: A Way to Thiol-Containing Peptides and Nitrogen Heterocycles in the Primitive Earth Ocean

Life, 2018
The Strecker reaction of aldehydes with ammonia and hydrogen cyanide first leads to α-aminonitriles, which are then hydrolyzed to α-amino acids.
Ibrahim Shalayel, Seydou Coulibaly, Kieu Dung Ly, Anne Milet, Yannick Vallée   +4 more
doaj   +1 more source

Cholinesterase-like organocatalysis by imidazole and imidazole-bearing molecules [PDF]

Scientific Reports, 2017
AbstractOrganocatalysis, which is mostly explored for its new potential industrial applications, also represents a chemical event involved in endogenous processes. In the present study, we provide the first evidence that imidazole and imidazole derivatives have cholinesterase-like properties since they can accelerate the hydrolysis of acetylthiocholine
NIERI, PAOLA, CARPI, SARA, FOGLI, STEFANO, POLINI, BEATRICE, BRESCHI, MARIA CRISTINA, PODESTA', ADRIANO   +5 more
openaire   +3 more sources

N-Pyridinyl Sulfilimines as a Source for α-Imino Gold Carbenes: Access to 2-Amino-Substituted N-Fused Imidazoles.

Organic Letters, 2019
Gold-catalyzed formal 1,3-dipolar annulation between readily accessible N-pyridinylsulfilimines and ynamides is reported. A diverse set of imidazole derivatives is prepared from the corresponding sulfilimines and ynamides.
Xianhai Tian, Lina Song, M. Rudolph, Qian Wang, Xinlong Song, F. Rominger, A. Hashmi   +6 more
semanticscholar   +1 more source

Fruit juices act as biocatalysts in the efficient synthesis of potentially bioactive imidazoles

Green Chemistry Letters and Reviews, 2022
An efficient and eco-friendly itinerary has been carried out for the synthesis of imidazole derivatives (3a–3h) from the reactions between substituted aldehydes (1a–1h), benzil (2a), and ammonium acetate (2b) in Citrus limon L.
Susheel Gulati, Rajvir Singh, Suman Sangwan   +2 more
doaj   +1 more source

1-Propyl-4(5)-Methylimidazole Isomers for Temperature Swing Solvent Extraction

Molecules, 2022
Temperature swing solvent extraction (TSSE) utilizes an amine solvent with temperature-dependent water solubility to dissolve water at a lower temperature to concentrate or crystallize the brine and the phases are separated.
Shuai Qian, Lauren M. Ward, Luke S. Rakers, Steven T. Weinman, Jason E. Bara   +4 more
doaj   +1 more source

Cyclization of Activated Methylene Isocyanides with Methyl N(N),N′-Di(tri)substituted Carbamimidothioate: A Novel Entry for the Synthesis of N,1-Aryl-4-tosyl/ethoxycarbonyl-1H-imidazol-5-amines

SynOpen, 2019
Base-induced cyclization of active methylene isocyanides with carbamimidothioates for the synthesis of N,1-aryl-4-tosyl/ethylcarboxy-1H-imidazol-5-amines is reported.
Dukanya Dukanya, Toreshettahally R. Swaroop, Shobith Rangappa, Kanchugarakoppal S. Rangappa, Basappa Basappa   +4 more
doaj   +1 more source

Synthesis, Characterization, and Catalytic Properties of Magnetic Fe3O4@FU: A Heterogeneous Nanostructured Mesoporous Bio-Based Catalyst for the Synthesis of Imidazole Derivatives

Frontiers in Chemistry, 2020
In this protocol, Fucoidan (FU), a fucose-rich sulfated polysaccharide extracted from brown algae Fucus vesiculosus was used for in situ preparation of magnetic Fe3O4@FU. Nanoco magnetic properties of Fe3O4@FU were investigated by energy dispersive X-ray
Maryam Banazadeh, Sara Amirnejat, Shahrzad Javanshir   +2 more
doaj   +1 more source

Acyl‐Imidazoles: A Privileged Ester Surrogate for Enantioselective Synthesis

ChemCatChem, 2019
Since the first report by Evans in asymmetric Friedel‐Crafts reactions, the use of acyl‐imidazoles has blossomed as powerful ester/amide surrogates. The imidazole scaffold indeed displays stability and special activation features allowing both better ...
Jimmy Lauberteaux, Delphine Pichon, O. Baslé, M. Mauduit, Renata Marcia de Figueiredo, J. Campagne   +5 more
semanticscholar   +1 more source

β–Cyclodextrin–Propyl Sulfonic Acid Catalysed One-Pot Synthesis of 1,2,4,5-Tetrasubstituted Imidazoles as Local Anesthetic Agents

Molecules, 2015
Some functionalized 1,2,4,5-tetrasubstituted imidazole derivatives were synthesized using a one-pot, four component reaction involving 1,2-diketones, aryl aldehydes, ammonium acetate and substituted aromatic amines.
Yan Ran, Ming Li, Zong-Ze Zhang
doaj   +1 more source