Results 171 to 180 of about 586 (203)

Regioselectivity in Reactions of Bis‐Hydrazonoyl Halides with Some Bifunctional Heterocycles

Journal of the Chinese Chemical Society, 2002
AbstractBis‐hydrazonoyl chloride 1 reacts regioselectively with 3‐mercapto‐1,2,4‐triazole 2a, 2,3‐dihydro‐3‐thioxo‐1,2,4‐triazin‐5(4H)‐one 2b and 2‐mercaptobenzimidazole 2c to give the hitherto unknown annelated 2,3‐bis‐(phenylhydrazono)thiazoles 6a‐c, respectively.
Ahmad S. Shawali, Magda A. Abdallah, Mohie E. M. Zayed   +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: 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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Reaction of hydrazonoyl halides with N‐aryl substituted benzamidines

Journal of Heterocyclic Chemistry, 1980
AbstractThe reaction between hydrazonoyl halides and N‐arylbenzamidines leads to the simultaneous formation of products derived from a substitution and a cycloaddition reaction via two independent paths.
Fulvio Anzani, Piero Dalla Croce, Riccardo Stradi   +2 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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Hydrazonoyl Halides Precursors to Synthesis of New Thiazole, Thiadiazole, and Benzothiazepine Derivatives

Journal of Heterocyclic Chemistry, 2016
New series of substituted thiazole and thiadiazoles were prepared starting from N′‐(3,4‐dihydronaphthalen‐1(2H)‐ylidene)hydrazinecarbothiohydrazide by reacting with different types of hydrazonoyl chlorides. In addition, 7‐(4‐chlorophenyl)‐5,6,6a,7‐tetrahydrobenzo [b]naphtha‐[1,2‐e][1,4]thiazepine reacted with hydrazonoyl halides to afford a new ...
Fatma A. A. El‐Hag, Sobhi M. Gomha, Thoraya A. Farghaly   +2 more
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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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New Convenient Routes of Hydrazonoyl Halides for the Synthesis of Novel Thiazoles and Polythiazoles

Polycyclic Aromatic Compounds, 2020
The present effort is to use good organized method for the synthesis of novel thiazoles from the reaction of different α-haloketohydrazonoyl halides with thiosemicarbazones in the basic medium at r...
Abdelwahed R. Sayed, Sobhi M. Gomha, Yasair S. Al-Faiyz, Yasser H. Zaki   +3 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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Regioselectivity in the Reactions of Bis-hydrazonoyl Halides with Pyrimidine-2-thiones

Monatshefte fuer Chemie/Chemical Monthly, 2001
Bis-hydrazonoyl chlorides react regioselectively with pyrimidine-2-thiones, which contain a masked thiourea residue, to give the hitherto unknown annelated 2,3-bis-arylhydrazono-thiazoles and 3,3′-bis-1,2,4-triazoles. Reaction of bis-hydrazonoyl chlorides with 2-methylthio derivatives gave only 3,3′-bis-1,2,4-triazoles.
Ahmad S. Shawali, Rifaat H. Hilal, Said El-Sheikh   +2 more
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