Results 71 to 80 of about 11,559 (254)

Azirinium ylides from α-diazoketones and 2H-azirines on the route to 2H-1,4-oxazines: three-membered ring opening vs 1,5-cyclization

Beilstein Journal of Organic Chemistry, 2015
Strained azirinium ylides derived from 2H-azirines and α-diazoketones under Rh(II)-catalysis can undergo either irreversible ring opening across the N–C2 bond to 2-azabuta-1,3-dienes that further cyclize to 2H-1,4-oxazines or reversibly undergo a 1,5 ...
Nikolai V. Rostovskii, Mikhail S. Novikov, Alexander F. Khlebnikov, Galina L. Starova, Margarita S. Avdontseva   +4 more
doaj   +1 more source

Volatile organic compounds and consumer preference for meat from suckling goat kids raised with natural or replacers milk [PDF]

, 2019
Most of European Union goats are slaughtered with carcase weights between 5 kg and 11 kg. Some farmers rear kids with milk replacers to produce cheese with the dams’ milk.
Alcalde Aldea, María Jesús, Argüello Hernández, Anastasio, Casquete, Rocío, Guía Córdoba, María de, Martín, Alberto, Panea, Begoña, Ripoll García, Guillermo   +6 more
core   +3 more sources

Decoding Urease Inhibition: A Comprehensive Review of Inhibitor Scaffolds

ChemMedChem, Volume 21, Issue 2, January 2026.
Representative functional groups known for urease inhibition are reviewed within diverse scaffolds using structure–activity analyses to identify features associated with high inhibitory activity. Urease is a metalloenzyme produced by a wide range of organisms and plays a critical role in nitrogen microbial metabolism by catalyzing the hydrolysis of ...
Nuno Martinho, Natália Aniceto
wiley   +1 more source

The Cyclisation of l-Aryl-2-Benzamidoalkan-l-Ols to 4,5-DihydroOxazoles or Isoquinolines [PDF]

, 1990
The cyclisation of several N-benzoyl derivatives of 2-amino-l-phenylpropan-l-ol w~e carried out employing the Pictet-Cams modification ofthe BischlerNapieralski reaction. The formation of4, 5-dihydro-oxazoles orisoquinolines depends on the substituents
Md. Sharif, Atan, O. Fitton, Alan
core  

Discrimination of roast and ground coffee aroma [PDF]

, 2012
Background: Four analytical approaches were used to evaluate the aroma profile at key stages in roast and ground coffee brew preparation (concentration within the roast and ground coffee and respective coffee brew; concentration in the headspace of the
AM Costa Freitas, AS Franca, C Yeretzian, C Yeretzian, CG Zambonin, E Cantergiani, EA Da Silva, F Mayer, F Ullrich, G Budryn, H Steinhart, I Flament, ID Fisk, ID Fisk, ID Fisk, ID Fisk, J Pawliszyn, M Bröhan, M Korhoňová, N Bhumiratana, N Wang, O Gonzalez-Rios, P Schieberle, P Semmelroch, P Semmelroch, PDC Mancha Agresti, RG Buttery, S Risticevic, W Grosch, W Holscher   +29 more
core   +3 more sources

Development of New Benzo[b]Thiophene‐2‐Carboxamide Derivatives as Advanced Glycation End‐Products Receptor (RAGE) Antagonists

ChemMedChem, Volume 21, Issue 1, January 2026.
A streamlined Ullmann‐Goldberg strategy enabled the synthesis of benzo[b]thiophene‐2‐carboxamides, promising ligands of the pro‐inflammatory RAGE receptor involved in inflammaging and age‐related diseases. LC‐MS, NMR, X‐ray and DFT studies elucidated the copper‐catalyzed mechanism. The lead compound, 3t’, shows inhibitory activity on the sRAGE/AGE2‐BSA
Lisa Bonin, Matthieu Hedouin, Christophe Furman, Ophélie Not, Steve Lancel, Mona Bensalah, Gael Coadou, Eric Boulanger, Sergiu Shova, Hassan Oulyadi, Alina Ghinet   +10 more
wiley   +1 more source

Iodoaminations of alkenes [PDF]

, 2016
The activation of alkenes and their subsequent functionalization is a frequently used methodology in synthetic chemistry. This review highlights recent iodine-mediated aminations and elaborates on the various strategies to bring about regio- or ...
Mizar, Pushpak, Wirth, Thomas
core   +1 more source

Transfer Hydrogenation: Advances in Manganese and Nickel Metal Catalysis

Journal of Chemistry, Volume 2026, Issue 1, 2026.
Transfer hydrogenation (TH) of ketones, catalyzed by transition–metal complexes, produces alcohols, which are important building blocks in the pharmaceutical and fine chemical industries. For a long time, catalysts based on noble metals such as ruthenium, rhodium, and iridium have dominated the TH of ketones.
James Kamau, George S. Nyamato, Joanne Ogunah, Munmun Bardhan   +3 more
wiley   +1 more source

GO/MNPs–TEA–CuI in water: a green and efficient catalytic system for multicomponent preparation of highly substituted imidazoles and oxazoles

Frontiers in Chemistry
A sustainable and highly efficient catalytic protocol has been developed employing graphene oxide-supported magnetic nanoparticles functionalized with triethanolamine and copper(I) iodide (GO/MNPs–TEA–CuI) for the synthesis of functionalized imidazole ...
Mohamed Abu Shuheil, Ahmed Aldulaimi, Rekha M. M., Subhashree Ray, Omayma Salim Waleed, C. P. Surya, Renu Sharma, Vatsal Jain   +7 more
doaj   +1 more source

Solid Phase versus Solution Phase Synthesis of Heterocyclic Macrocycles

Molecules, 2013
Comparing a solution phase route to a solid phase route in the synthesis of the cytotoxic natural product urukthapelstatin A (Ustat A) confirmed that a solid phase method is superior.
Shelli R. McAlpine, Seong Jong Kim
doaj   +1 more source