Results 41 to 50 of about 873 (170)

Convenient Synthesis of Thiohydantoins, Imidazole-2-thiones and Imidazo[2,1-b]thiazol-4-iums from Polymer-Supported α-Acylamino Ketones

open access: yesMolecules, 2018
The preparation of 5-methylene-thiohydantoins using solid-phase synthesis is reported in this paper. After sulfonylation of immobilized Ser (t-Bu)-OH with 4-nitrobenzenesulfonyl chloride followed by alkylation with various bromoketones, the 4-Nos group ...
Petra Králová   +3 more
doaj   +1 more source

Decoding Urease Inhibition: A Comprehensive Review of Inhibitor Scaffolds

open access: yesChemMedChem, 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

Heterocyclic systems containing S/N regioselective nucleophilic competition: facile synthesis, antitubercular and antimicrobial activity of thiohydantoins and iminothiazolidinones containing the benzo[b]thiophene moiety [PDF]

open access: yesJournal of the Serbian Chemical Society, 2005
The required compounds N-aryl-N'-(3-chloro-2-benzo[b]thenoyl)–thioureas 1a–k were prepared by condensing 3-chloro-2-benzo[b]thenoyl chloride with different arylamines using ammonium thiocyanate, which in turn when treated with chloroacetic acid, yielded ...
H. S. JOSHI   +2 more
doaj  

Illuminating Tau Aggregates: Multiscale Approaches for Detection, Imaging, and Understanding

open access: yesAggregate, Volume 6, Issue 10, October 2025.
This review presents recent advances in molecular imaging of tauopathies, focusing on tau aggregation mechanisms, structural polymorphism, and imaging strategies. It highlights the development of tau‐selective fluorescent probes and PET tracers and explores emerging techniques such as cryo‐EM and super‐resolution imaging, offering a multiscale ...
Kaustubh R. Bhuskute   +2 more
wiley   +1 more source

Reactivity of 2-Thiohydantoins Towards Various Electrophilic Reagents: Applications to the Synthesis of New 2-Ylidene-3,5-dihydro-4H-imidazol-4-ones.

open access: yesMolecules, 2004
A new route to 5-(imidazolidin-2-ylidene)-2-methylsulfanyl-3,5-dihydro-imidazol-4-ones 4a-c using ketene dithioacetal intermediates 3a-c is described.
Jean Pierre Bazureau   +2 more
doaj   +1 more source

Investigation of Novel Isatinylhydantoin Derivatives as Potential Anti‐Kinetoplastid Agents

open access: yesChemMedChem, Volume 20, Issue 1, January 2, 2025.
A series of isatinylhydantoin derivatives were synthesized and investigated for antileishmanial and antitrypanosomal activities in vitro and in vivo. The derivative 5 was identified with higher leishmanicidal activity than the clinical drug amphotericin B while 4b was uncovered as in vitro trypanocidal hit against T. congolense parasite.
Keamogetswe Sechoaro   +5 more
wiley   +1 more source

1,2‐Diaza‐1,3‐Dienes as a Multifaceted Synthons for the Synthesis of Heterocycles: A Fifteen‐Years Update

open access: yesEuropean Journal of Organic Chemistry, Volume 27, Issue 44, November 25, 2024.
1,2‐Diaza‐1,3‐butadienes, also called azoalkenes, have received considerable attention as key synthons for constructing various heterocyclic scaffolds. This minireview summarizes the contribution of our group in this field over the period from 2009 to the present, focusing on the role of the azoene building block in forming the heterocyclic structures.
Lucia De Crescentini   +4 more
wiley   +1 more source

HYDANTOINS: SYNTHESIS OF 5-THIOHYDANTOINS. [NINETEENTH PAPER.] [PDF]

open access: yesJournal of the American Chemical Society, 1912
n ...
Johnson, Treat B., Chernoff, Lewis H.
openaire   +2 more sources

Chiral Quaternary Ammonium Salt‐Catalyzed Enantioselective Addition Reactions of Hydantoins

open access: yesHelvetica Chimica Acta, Volume 107, Issue 3, March 2024.
Abstract We herein report a protocol for the asymmetric 1,4‐addition of hydantoins to various Michael acceptors by utilizing Cinchona alkaloid‐based chiral quaternary ammonium salt catalysts. Various products were obtained with moderate to good enantioselectivities and accompanying computational investigations helped to identify key interactions ...
Katharina Röser   +5 more
wiley   +1 more source

Dopaminergic neuronal death via necroptosis in Parkinson's disease: A review of the literature

open access: yesEuropean Journal of Neuroscience, Volume 59, Issue 6, Page 1079-1098, March 2024.
We reviewed the current literature on the potential role of necroptosis, a recently characterized regulated cell death mechanism, in Parkinson's disease (PD) pathogenesis. We summarized findings from studies on necroptosis in PD preclinical models and PD human tissue samples, discussing how manipulating necroptosis might open a novel therapeutic ...
Maria Regoni   +2 more
wiley   +1 more source

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