Results 1 to 10 of about 913 (183)

5-(4H)-Oxazolones and Their Benzamides as Potential Bioactive Small Molecules [PDF]

open access: yesMolecules, 2020
The five membered heterocyclic oxazole group plays an important role in drug discovery. Oxazolones present a wide range of biological activities. In this article the synthesis of 4-substituted-2-phenyloxazol-5(4H)-ones from the appropriate substituted ...
Evangelos Mavridis   +3 more
doaj   +3 more sources

Inhibitory Activity of 4-Benzylidene Oxazolones Derivatives of Cinnamic Acid on Human Acetylcholinesterase and Cognitive Improvements in a Mouse Model [PDF]

open access: yesMolecules, 2023
We synthesized seven (Z)-benzylidene-2-(E)-styryloxazol-5(4H)-ones derivatives of cinnamic acid and evaluated the ability of these compounds to inhibit human acetylcholinesterase (hAChE).
Alma Marisol Ramírez-Ruiz   +9 more
doaj   +2 more sources

New Heterocyclic Compounds from Oxazol-5(4H)-one and 1,2,4-Triazin-6(5H)-one Classes: Synthesis, Characterization and Toxicity Evaluation [PDF]

open access: yesMolecules, 2023
This paper describes the synthesis of new heterocycles from oxazol-5(4H)-one and 1,2,4-triazin-6(5H)-one classes containing a phenyl-/4-bromophenylsulfonylphenyl moiety.
Stefania-Felicia Barbuceanu   +12 more
doaj   +2 more sources

One-Pot Synthesis of 3,4-Dihydrocoumarins via C-H Oxidation/Conjugate Addition/Cyclization Cascade Reaction [PDF]

open access: yesMolecules, 2023
The 3,4-dihydrocoumarin derivatives were obtained from 2-alkyl phenols and oxazolones via C–H oxidation and cyclization cascade in the presence of silver oxide (Ag2O) and p-toluenesulfonic acid as a Brønsted acid catalyst.
Dae Young Kim
doaj   +2 more sources

Fluorescent Orthopalladated Complexes of 4-Aryliden-5(4H)-oxazolones from the Kaede Protein: Synthesis and Characterization [PDF]

open access: yesMolecules, 2021
The goal of the work reported here was to amplify the fluorescent properties of 4-aryliden-5(4H)-oxazolones by suppression of the hula-twist non-radiative deactivation pathway. This aim was achieved by simultaneous bonding of a Pd center to the N atom of
Eduardo Laga   +7 more
doaj   +2 more sources

Synthesis of esters of diaminotruxillic bis-amino acids by Pd-mediated photocycloaddition of analogs of the Kaede protein chromophore [PDF]

open access: yesBeilstein Journal of Organic Chemistry, 2020
The stereoselective synthesis of truxillic bis-amino esters from polyfunctional oxazolones is reported. The reaction of 4-((Z)-arylidene)-2-(E)-styryl-5(4H)-oxazolones 2 with Pd(OAc)2 resulted in ortho-palladation and the formation of a dinuclear open ...
Esteban P. Urriolabeitia   +6 more
doaj   +2 more sources

Pharmacological investigations of newly synthesized oxazolones and imidazolones as COX-2 inhibitors [PDF]

open access: yesSaudi Pharmaceutical Journal
Oxazoles and Imidazoles are heterocyclic compounds with significant biological activities. The present study explores the pharmacological effects of some new oxazole and imidazole derivatives as potential COX-2 inhibitors.
Iqra Saleem Naz Babari   +4 more
doaj   +2 more sources

Chiral phosphoric acid-catalyzed stereodivergent synthesis of trisubstituted allenes and computational mechanistic studies [PDF]

open access: yesNature Communications, 2020
Despite of the high demand of chiral allenes, their asymmetric synthesis remains a challenge for organic chemists. Here, the authors report a stereodivergent synthesis of trisubstituted allenes via asymmetric additions of oxazolones to activated 1,3 ...
Jiawen Wang   +6 more
doaj   +2 more sources

Design, synthesis, anticancer properties, and molecular docking of imidazolone derivatives with lipophilic moiety [PDF]

open access: yesScientific Reports
As part of an ongoing investigation into imidazolone derivatives with anticancer activities, herein we present the synthesis of a new series of imidazolones with various substituents, including lipophilic and hydrophilic. All synthesized imidazolones (3a–
Oswa Fares   +10 more
doaj   +2 more sources

Synthesis, spectroscopic characterization and pharmacological evaluation of oxazolone derivatives [PDF]

open access: yesJournal of the Serbian Chemical Society, 2013
A series of 4-aryl methylidene-2-phenyl/methyl-5-(4H)-oxazolone derivatives (2-7) have been synthesized using the reported method by condensation of aldehydes with N-benzoyl / N-acetyl glycine in the presence of zinc oxide as a catalyst and acetic ...
Fareed Ghulam   +7 more
doaj   +1 more source

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