Results 171 to 180 of about 39,725 (197)

ChemInform Abstract: REACTION OF HYDRAZONOYL HALIDES WITH N‐ARYL‐SUBSTITUTED BENZAMIDINES

Chemischer Informationsdienst, 1980
AbstractHydrazonoylchloride (I) reagieren mit den N‐Arylbenzamidinen (II) zu Mischungen aus den Reaktionsprodukten (III)‐(VII).
F. ANZANI, P. DALLA CROCE, R. STRADI
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Tautomerism and Reactions of 1H-1,2,4-Triazole-5-thiones with Hydrazonoyl Halides

Journal f�r Praktische Chemie/Chemiker-Zeitung, 1998
The acid dissociation constants (Ka) of a series of 3,4-diaryl-1H-1,2,4-triazole-5-thiones (1) were determined and were found to correlated linearly with Hammett substituent constants; log Ka = 1.06 σx − 11.01. Such a result indicates that 1 exists essentially in one tautomeric form namely the thione form.
Mosselhi A. N. Mosselhi, Magda A. Abdallah, Sayed M. Riyadh, Abdelhamid E. Harhash, Ahmad S. Shawali   +4 more
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Hydrazonoyl Halides as Key Precursors for the Synthesis of Arylazo and Arylhydrazo Thiazoles

Mini-Reviews in Organic Chemistry
Abstract: Hydrazonoyl halides are versatile precursors in organic synthesis and are widely employed for constructing heterocyclic frameworks, including arylazo and hydrazo thiazoles. These compounds exhibit significant biological activities, including antimicrobial, antitumor, antiinflammatory, and antioxidant properties, as well as have applications ...
Sobhi M. Gomha, Magdi E. A. Zaki, Tariq Z. Abolibda, Thoraya A. Farghaly, Shubham Sharma, Yasser H. Zaki   +5 more
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Reactions with Hydrazonoyl Halides. Part 15.1 A Synthetic Approach to 2,3-Dihydrothiadiazoles

Journal of Chemical Research, 1998
Hydrazonoyl halides 1 and 6a–f reacted with methyl hydrazinecarbodithioate (2) and methyl 3-[1-(aryl)alkylmethylidene]hydrazinecarbodithioates (9a–d or 10a,b), in ethanolic triethylamine solution, to afford the corresponding 2-hydrazono-3,5-diphenyl-2,3-dihydro-1,3,4-thiadiazoles (3), 5-methyl-2-methylsulfanyl-6-phenylhydrazono-1,3,4-thiadiazine (8 ...
Hussein A. Emam, Hussein F. Zohdi, Adbou O. Abdelhamid   +2 more
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Biological Activity, Apoptotic Induction and Cell Cycle Arrest of New Hydrazonoyl Halides Derivatives

Anti-Cancer Agents in Medicinal Chemistry, 2019
Background:The hydrazonoyl halides are presently an important target in the field of medicinal chemistry. The interest in the chemistry of hydrazonoyl halides is a consequence of the fact that they undergo a wide variety of reactions which provide routes to a myriad of both heterocyclic and acyclic compounds.
Magda F, Mohamed, Hamdi M, Hassaneen, Emad M, Elzayat, Salwa M, El-Hallouty, May, El-Manawaty, Fatma M, Saleh, Yasmin, Mohamed, Dina, El-Zohiry, Ghada, Fahmy, Nesma, Abdelaal, Nouran, Hassanin, Nouran, Hossam   +11 more
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ChemInform Abstract: Reactions of C‐(Dialkoxyphosphoryl)hydrazonoyl Halides with Acid Salts.

ChemInform, 1991
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
B. I. BUZYKIN, M. P. SOKOLOV
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ChemInform Abstract: Chemoselectivity in Reactions of Hydrazonoyl Halides with Ethyl 2(3H)‐Permidinylideneacetate.

ChemInform, 2016
AbstractThe chemoselectivity of the title reaction is shown to be depending on the type of the utilized hydrazonoyl halide.
Ahmed Sami Shawali, Thoraya A. Farghaly, Tarek M. S. Nawar   +2 more
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[3 + 2] Cycloaddition Reaction of Vinylsulfonium Salts with Hydrazonoyl Halides: Synthesis of Pyrazoles

The Journal of Organic Chemistry
An efficient [3 + 2] cycloaddition reaction between in situ generated nitrile imines from hydrazonoyl halides and vinylsulfonium salts is developed. The nitrile imines are demonstrated to be a new class of reaction partner for vinylsulfonium salts to conduct the [3 + 2] cycloaddition reaction. The process provides a concise and efficient method for the
Wen-Jing Luo, Xiuwen Liang, Maizhuo Chen, Ke-Hu Wang, Danfeng Huang, Junjiao Wang, Dong-Ping Chen, Yulai Hu   +7 more
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Studies on Organophosphorus Compounds. Part 11. The Reaction of Phosphorus Reagents with Hydrazonoyl Halides, Hydrazonoyl Azides, and Schiff′s Bases.

ChemInform, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
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Advances in the Synthesis of Heterocycles with Two and Three Heteroatoms using Hydrazonoyl Halides

Helvetica Chimica Acta
AbstractThe review covers the results of studies published in the literature on the use of hydrazonoyl halides in the synthesis of five‐ (pyrazoles, thiazoles, triazoles, oxa‐ and thiadiazoles), six‐ (oxa‐ and thiadiazines, indazoles, pyridazines, pyrazines, tetrazines) or seven‐membered (benzotriazepine) heterocycles.
Nargiza R. Yamaletdinova, Rail R. Gataullin   +1 more
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