Results 21 to 30 of about 3,055 (201)
Different Schiff Bases—Structure, Importance and Classification
Schiff bases are a vast group of compounds characterized by the presence of a double bond linking carbon and nitrogen atoms, the versatility of which is generated in the many ways to combine a variety of alkyl or aryl substituents. Compounds of this type
Edyta Raczuk +3 more
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Hydrazi‐dicarbon‐hydrazid [PDF]
n ...
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Aim. Analysis of the scientific literature over the past decade has shown that large synthetic possibilities towards creating new and effective drug substances have heterocyclic compounds, in particular the derivatives of 1,2,4-triazole.
O. A. Suhak +2 more
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The synthesis of hydrazides formed by quinazolin-4(3H)-ylidenehydrazine and dicarboxylic acids, as well as their further modification are described in the present manuscript.
Nataliia Krasovska +5 more
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Three 1,2,4-triazole derivatives have been synthesised from hydrazides and 2-(2-hydroxyphenyl)-4H-1,3-benzoaxin-4-one. With the aid of Conceptual Density Functional Theory (CDFT), Molecular Electrostatic Potential (MEP) and Quantum Theory of Atoms in ...
Louis-Charl C. Coetzee +4 more
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Pharmacological aspects of hydrazides and hydrazide derivatives
Intense search for new antimicrobials, including anti-tuberculosis drugs, is dictated by the phenomenon of bacterial multidrug resistance. Hydrazides are considered the key intermediate and valuable starting material for some novel biologically active compounds.
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Novel one-pot process for the synthesis of ethyl 2-imino-4-methyl-2,3-dihydrothiazole-5-carboxylates [PDF]
A facile one-pot two-step process for the synthesis of ethyl 2-imino-4-methyl-2,3-dihydrothiazole-5-carboxylates via the cyclocondensation of ethyl 2-thiocyanatoacetoacetate with a variety of hydrazine and hydrazide derivatives has been ...
Beyzaei Hamid, Aryan Reza, Moghadas Hadi
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Organic solvent-free synthesis of sulfonyl hydrazides in water
An organic solvent-free synthesis of sulfonyl hydrazides has been achieved in water. The reactions of equimolar amount of sulfonyl chlorides and hydrazines afforded a series of substituted sulfonyl hydrazides at 60 °C for 1 h in water as a solvent in ...
Shizuki Noda, Shinji Tanimori
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Synthesis and Antioxidant Activity of Some New Coumarinyl-1,3-Thiazolidine-4-ones
A series of Schiff’s bases (E)-N-2-aryliden-2-(4-methyl-2-oxo-2H-chromen-7-yloxy)acetohydrazides 2a-l and N-(2-(substituted phenyl)-4-oxo-thiazolidin-3-yl)-2-(4-methyl-2-oxo-2H-chromen-7-yloxy)acetamides 3a-l were synthesized and evaluated for their ...
Valentina Rajković +4 more
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An efficient, fast, and environmentally gentle protocol for phthaloylation of amines, hydrazines and hydrazides via transamidation is described. The current research focuses on the phthaloylation of alicyclic, aliphatic, aromatic, heterocyclic amines ...
Prerna Ganwir +2 more
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