Results 101 to 110 of about 4,154 (224)

Synthesis and in Vitro Antimicrobial Activity of Some Pyrazolyl-1-carboxamide Derivatives

open access: yesMolecules, 2011
A series of 3,5-disubstituted pyrazole-1-carboxamides were obtained by treatment of chalcones with semicarbazide hydrochloride in dioxane containing sodium acetate/acetic acid as a buffer solution.
Essam Mohamed Sharshira   +1 more
doaj   +1 more source

Tetrahydroquinazoline-substituted chromones from Diels–Alder reaction of (E)-2-styrylchromones and pyrimidine ortho-quinodimethane [PDF]

open access: yes, 2012
The Diels-Alder reaction of (E)-2-styrylchromones with a pyrimidine ortho-quinodimethane is reported for the first time. These cycloaddition reactions afford mixtures of two regioisomeric tetrahydroquinazoline-substituted chromones in moderate to ...
Cavaleiro, José   +5 more
core   +1 more source

Synthesis and fluorine-mediated interactions in methanol-encapsulated solid state self-assembly of an isatin-thiazoline hybrid

open access: yes, 2015
International audienceAn exciting isatin-thiazoline hybrid molecule 2 having -C=N-N=C- linkage has been synthesized in 88% yield by the reaction of 5-fluoroisatin with N-(4-fluorophenyl)hydrazinecarbothioamide followed by condensation of the resultant ...
Ahmad, Maqbool   +4 more
core   +3 more sources

Synthesis, in vitro antifungal evaluation and in silico study of 3-azolyl-4-chromanone phenylhydrazones [PDF]

open access: yes, 2012
BACKGROUND: The currently available antifungal drugs suffer from toxicity, greatest potential drug interactions with other drugs, insufficient pharmacokinetics properties, and development of resistance.
Adile Ayati   +3 more
core   +1 more source

An Efficient Protocol for Synthesis of Pyrazolo[3,4-a]acridines [PDF]

open access: yes, 2015
A new class of pyrazolo[3,4-a]acridines have been prepared, the synthon acridones were obtained in very good yield by one pot reaction of 2-amino-5-chloro or nitro substituted benzophenones with 1,3-cyclic diketones in the presence of freshly prepared ...
Kaminsky, Werner   +3 more
core   +2 more sources

Photochemical Transformations of Tetrazole Derivatives: Applications in Organic Synthesis [PDF]

open access: yes, 2010
Tetrazoles remain a challenge to photochemists. Photolysis leads to cleavage of the tetrazolyl ring, may involve various photodegradation pathways and may produce a diversity of photoproducts, depending on the structure and conformational flexibility of
Amin Ismael   +18 more
core   +2 more sources

Synthesis and Characterization of Some New Pyrazoline and Isoxazoline Derivatives as Antibacterial Agents

open access: yesمجلة بغداد للعلوم, 2016
In this paper some chalcones (C1-C8) are prepared based on the reaction of one mole of substituted acetophenone with one mole of substituted benzaldehydes in the presence of (40%) sodium hydroxide as a base.
Baghdad Science Journal
doaj   +1 more source

Green synthesis and biological evaluation of novel 5-fluorouracil derivatives as potent anticancer agents [PDF]

open access: yes, 2019
This study reports the formation of 5-FU co-crystals with four different pharmacologically safe co-formers; Urea, Thiourea, Acetanilide and Aspirin using methanol as a solvent. Two fabrication schemes were followed i.e., solid-state grinding protocol, in
Abdelghani   +53 more
core   +2 more sources

Synthesis, Characterization and Fluorescent Property Evaluation of 1,3,5-Triaryl-2-pyrazolines

open access: yesMolecules, 2011
A series of 1,3,5-triaryl-2-pyrazolines was synthesized by dissolving the corresponding 4-alkoxychalcones in glacial acetic acid containing a few drops of concentrated hydrochloric acid.
Asghar Abbas   +2 more
doaj   +1 more source

Синтез нових біс-a, b-ненасичених похідних 4-метилциклогексанону - напівпродуктів для одержання біологічно активних гетероциклів [PDF]

open access: yes, 2004
Одержано низку нових біс-a, b-ненасичених кетонів конденсацією 4-метилциклогексанону з ароматичними та гетероциклічними альдегідами. Досліджено їх фізичні та спектральні властивості; показана можливість їх застосування для синтезу нових п`ятичленних ...
Листван, В. В.
core  

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