Results 51 to 60 of about 2,292 (253)
Molecules, 2016 A novel series of 1,3,4-thiadiazoles, 5-arylazothiazoles and hexahydropyrimido-[4,5-d][1,2,4]triazolo[4,3-a]pyrimidines were synthesized via reaction of hydrazonoyl halides with each of alkyl carbothioates, carbothioamides and 7-thioxo-5,6,7,8 ...
Abdou O. Abdelhamid +3 more
doaj +1 more source
Journal of Chemistry, Volume 2015, Issue 1, 2015., 2015 New heterocyclic compounds spiroderivatives of allopurinol of biological interest were prepared from allopurinol via thionation and 1,3‐dipolar cycloaddition and were produced in high to excellent yields. These compounds were characterized on the basis of spectral and spectroscopic data (1H NMR, 13C, IR, and MS).
Mohammed El Fal +6 more
wiley +1 more source
Synthesis and Antimicrobial Studies of Some Novel Bis-[1,3,4]thiadiazole and Bis-thiazole Pendant to Thieno[2,3-b]thiophene Moiety [PDF]
, 2012 The synthetic utility of 3,3′-(3,4-dimethylthieno[2,3-b]thiophene-2,5-diyl)bis (3-oxopropanenitrile) (1) in the synthesis of some novel bis-[1,3,4-thiadiazole] 6a–g and bis-thiazole 10 and 13 derivatives with thieno[2,3-b]thiophene moiety is reported ...
Kheder, Nabila Abdelshafy +1 more
core +3 more sources
A new convenient synthesis of 3-hetaryl-pyrazolo[5,1-c][1,2,4]triazines
Journal of Advanced Research, 2012 Reactions of enaminones 2 with diazotized 5-amino-3-phenylpyrazole provide a convenient route to 3-[(4,5-disubstituted-pyrazol-3-yl)carbonyl]-pyrazolo[5,1-c][1,2,4]triazines.
Ahmad S. Shawali
doaj +1 more source
Fused Imidazopyrazoles: Synthetic Strategies and Medicinal Applications
Journal of Chemistry, Volume 2014, Issue 1, 2014., 2014 The current review summarizes the known synthetic routes of fused imidazopyrazoles. This review is classified into two main categories based on the type of annulations, for example, annulation of the imidazole ring onto a pyrazole scaffold or annulation of the pyrazole ring onto an imidazole scaffold. Some medicinal applications of imidazopyrazoles are
Rizk E. Khidre +3 more
wiley +1 more source
Molecules, 2015 Reactions of hydrazonoyl halides and each of methyl 2-(1-(5-methyl-1-phenyl-1H-1,2,3-triazol-4-yl)ethylidene)hydrazine-1-carbodithioate and 2-(1-(5-methyl-1-phenyl-1H-1,2,3-triazol-4-yl)ethylidene)hydrazine-1-carbothioamide afforded 2-(1-(5-methyl-1 ...
Sobhi M. Gomha +2 more
doaj +1 more source
Benzo[1,5]thiazepine: Synthesis, Reactions, Spectroscopy, and Applications
Organic Chemistry International, Volume 2013, Issue 1, 2013., 2013 This review article deals with synthesis and reactions of benzo[1,5]thiazepines and the related derivatives and their applications, biological activity as well as spectroscopic data. Most of the reported data on the methods of synthesis, chemical reactions, and biological activity of these heterocycles published over the last ten years are reviewed in ...
Khairy A. M. El-Bayouki, William Setzer
wiley +1 more source
Molecules, 2011 Enaminone 1 was reacted with hydrazonoyl halides 2a-d to yield 3,4-disubstituted pyrazoles 6a-d. Coupling with arenediazonium chlorides afforded the 2-(arylhydrazono)-3-(1-naphthalenyl)-3-oxopropionaldehydes 13a-c.
Huwaida M. E. Hassaneen
doaj +1 more source
Halide mixing inhibits exciton transport in two-dimensional perovskites despite phase purity [PDF]
arXiv, 2021 Metal-halide perovskites are a versatile material platform for light-harvesting and light-emitting applications as their variable chemical composition allows the optoelectronic properties to be tailored to specific applications. Halide mixing is one of the most powerful techniques to tune the optical bandgap of metal-halide perovskites across wide ...
arxiv
Synthetic Methods, Chemistry, and the Anticonvulsant Activity of Thiadiazoles
International Journal of Medicinal Chemistry, Volume 2013, Issue 1, 2013., 2013 The chemistry of heterocyclic compounds has been an interesting field of study for a long time. Heterocyclic nucleus 1,3,4‐thiadiazole constitutes an important class of compounds for new drug development. The synthesis of novel thiadiazole derivatives and investigation of their chemical and biological behavior have gained more importance in recent ...
Bhawna Sharma +4 more
wiley +1 more source