Results 71 to 80 of about 2,292 (253)
Regioselective Catalytic Synthesis of Potentially Bioactive 1,3,4-Selenadiazole [PDF]
, 2023 Isoselenocyanates have a crucial role as reactants in chemical processes, facilitating the efficient synthesis of significant chemical intermediates and physiologically active chemicals.
Mahmoud, Mohamed Ali
core +1 more source
Synthesis of New Azoles and Azolopyrimidines Incorporating Morpholine Moiety as Potent Anti-Tumor Agents [PDF]
, 2018 A new series of morpholinyl-chalcones 2a–d was prepared by reaction of 2-oxo-N,4-diarylbut-3-enehydrazonoyl chlorides 1a–d with morpholine. These chalcones were used as a building block for constructing pyrazoles 3a–d and 3,4-dihydropyrimidine-2(1H ...
Elham Ezz El-Arab +3 more
core +2 more sources
Journal of Advanced Research, 2014 This review article presents a survey of the utility of a new synthetic strategy for 1,3,4-thiadiazole derivatives based on reactions of nitrilimines with various functionalized sulfur dipolarophiles which proceed via tandem in situ 1,3-dipolar ...
Ahmad S. Shawali
doaj +1 more source
Recent Applications of Sulfonium Salts in Synthesis and Catalysis
Chemistry – A European Journal, Volume 30, Issue 70, December 13, 2024.This review summarizes the recent developments on the synthetic applications of sulfonium salts with an emphasis on the description of the operating mechanistic pathways. Abstract The use of sulfonium salts in organic synthesis has experienced a dramatic increase during the last years that can arguably be attributed to three main factors; the ...
Sven Timmann, Zeyu Feng, Manuel Alcarazo
wiley +1 more source
Site-selectivite Synthesis and Tautomerism of Arylazo Derivatives of Pyrazolo[3,4-d]pyrimido-[1,6-b][1,2,4]triazine [PDF]
, 2008 A simple synthetic strategy is described for synthesis of the hitherto unreported 5-arylazo-1,3-diphenyl-6-substituted-1H-pyrazolo[3,4-d]pyrimido[1,6-b][1,2,4]triazines 5a-n.
Darwish, Manal A. A. +3 more
core
Synthesis and Antimicrobial Activity of Some New 1,3,4-Thiadiazole Derivatives
Molecules, 2012 New series of 1,3,4-thiadiazoles have been prepared via reaction of 1,3,4-thiadiazolenaminones 1 with N-phenyl 2-oxopropanehydrazonoyl chloride (2) in dioxane in the presence of triethylamine.
Mohamed R. Abdel Aziz +2 more
doaj +1 more source
Synthesis and Biological Evaluation of Some Novel Thiazole-Based Heterocycles as Potential Anticancer and Antimicrobial Agents. [PDF]
Molecules, 2019 A novel series of thiazole-based heterocycles was synthesized using 1,3-dipolar cycloaddition reactions in the presence of chitosan-grafted-poly(vinylpyridine) as an eco-friendly biopolymeric basic catalyst.
Abu-Melha S +5 more
europepmc +2 more sources
Chemistry – A European Journal, Volume 30, Issue 60, October 28, 2024.Due to the increasing interest in halo compounds in chemotherapy and protein modification/targeting in chiral bioenvironments, controlling the halogenation stereoselectivity is state‐of‐the‐art science. Halogenation of carbamoyl group (−NHC=O) has never been mechanistically studied. Herein, we dive into depths of regioselectivity and stereoselectivity,
Raed M. Maklad +3 more
wiley +1 more source
Sinteza i protuupalno, analgetsko i ulcerogeno djelovanje derivata tieno[2,3-d]pirimidina [PDF]
, 2007 5-Methyl-6-phenyl-2-thioxothieno[2,3-d]pyrimidone derivative (2) reacted with hydrazonoyl chloride derivatives to afford triazolothienopyrimidones 4a-f.
A. Abdel-Fattah +25 more
core +2 more sources
Molecules, 2012 A number of interesting heterocycles were prepared through interaction of the intermediate 3-amino-8-hydroxy-4-imino-6-methyl-5-phenyl-4,5-dihydro-3H-chromeno-[2,3-d]pyrimidine (1) and reagents such as hydrazonyl halides 2 to furnish triazine derivatives
Sobhi M. Gomha, Mohamed G. Badrey
doaj +1 more source