Results 191 to 200 of about 126,036 (251)
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Advances in the synthesis of heterocycles with two and three heteroatoms using hydrazonoyl halides.
Helvetica Chimica ActaThe 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 ...
R. Gataullin +1 more
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REACTION OF HYDRAZONOYL HALIDES WITH 2,4-DIOXOTETRAHYDROTHIAZOLE-5-THIOCARBOXANILIDES
Phosphorus, Sulfur, and Silicon and the Related Elements, 1995Abstract Reaction of 3-phenyl-2,4-dioxotetrahydrothiazole-5-thiocarboxanilides 3 with hydrazonoyl halides 4 in N,N-dimethylformamide in the presence of potassium hydroxide yielded the thiadiazoline derivatives 7 and 13. The mechanism of formation of the latter products is discussed.
Hyam A. Abdelhadi +2 more
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Synthesis and Development of Suitable Method for New Thiadiazoles using Hydrazonoyl Halides.
Current Organic SynthesisBACKGROUND Hydrazonoyl halides and methylhydrazinecarbodithioate have been generally utilized in the synthesis of heterocycles. METHODS This study describes a new and simple method to prepare new thiadiazoles from the reaction of N-(naphthalen-1-yl)-2 ...
Munirah F. Alarbash +3 more
semanticscholar +1 more source
, 2017
The chromene compound is used as a key intermediate for synthesis of new heterocyclic compounds, and it reacted with hydrazonoyl chlorides in presence of TEA to give the amidrazone derivatives , which were cyclized to the corresponding triazepines on ...
M. Badrey +3 more
semanticscholar +1 more source
The chromene compound is used as a key intermediate for synthesis of new heterocyclic compounds, and it reacted with hydrazonoyl chlorides in presence of TEA to give the amidrazone derivatives , which were cyclized to the corresponding triazepines on ...
M. Badrey +3 more
semanticscholar +1 more source
, 2013
New bis(pyrazolylenaminones) were prepared in good yields. Their synthetic utilities as precursors for regioselective synthesis of novel bis(hetarylpyrazoles) were also investigated. The mechanisms and selectivities observed in the studied reactions were
A. S. Shawali, Adel J. M. Haboub
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New bis(pyrazolylenaminones) were prepared in good yields. Their synthetic utilities as precursors for regioselective synthesis of novel bis(hetarylpyrazoles) were also investigated. The mechanisms and selectivities observed in the studied reactions were
A. S. Shawali, Adel J. M. Haboub
semanticscholar +2 more sources
1,4‐benzothiazine derivatives from 2‐aminobenzenethiol and hydrazonoyl halides
Journal of Heterocyclic Chemistry, 1983Abstract2‐Aminobenzenethiol was condensed with alkyl α‐chlorophenylhydrazonoglyoxylates yielding alkyl 2‐(2‐aminophenylthio)‐2‐arylhydrazonoglyoxylates which were cyclized to the corresponding 2‐arylhydrazono‐2,3‐dihydro‐4H‐1,4‐benzothiazin‐3‐ones.
Luciana Forti, Nicoletta Almirante
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ChemInform Abstract: Synthesis and Antitumor Activity of Novel Pyrazolylenaminone and Bis(pyrazolyl)ketones via Hydrazonoyl Halides. [PDF]
ChemInform, 2009 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 of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
Manal A. A. Darwish +3 more
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ChemInform Abstract: Reactions of C‐(Dialkoxyphosphoryl)hydrazonoyl Halides with Acid Salts.
ChemInform, 1991AbstractChemInform 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.
M. P. Sokolov, B. I. Buzykin
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Phosphorus, Sulfur, and Silicon and the Related Elements, 2006
N-(chloro-furan-2-yl)methylene-N′-(4-nitrophenyl)hydrazone (I) reacted with triethylphosphite to produce the phosphonate derivative III. The tetrazine derivative VI was produced by the interaction of I with diethyl-phosphite. Hydrazonoyl azide derivatives VIIIa–c reacted with triphenyl phosphine to form the iminophosphorane derivatives Xa–c.
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N-(chloro-furan-2-yl)methylene-N′-(4-nitrophenyl)hydrazone (I) reacted with triethylphosphite to produce the phosphonate derivative III. The tetrazine derivative VI was produced by the interaction of I with diethyl-phosphite. Hydrazonoyl azide derivatives VIIIa–c reacted with triphenyl phosphine to form the iminophosphorane derivatives Xa–c.
openaire +2 more sources