Results 21 to 30 of about 3,055 (201)

Different Schiff Bases—Structure, Importance and Classification

open access: yesMolecules, 2022
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
doaj   +1 more source

Hydrazi‐dicarbon‐hydrazid [PDF]

open access: yesBerichte der deutschen chemischen Gesellschaft, 1910
n ...
openaire   +1 more source

Synthesis, physical-chemical properties of 2-((4-R-5-(thiophene-2-ylmethyl)-4H-1,2,4-triazole-3-yl)thio)acetohydrazides

open access: yesAktualʹnì Pitannâ Farmacevtičnoï ì Medičnoï Nauki ta Praktiki, 2017
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
doaj   +1 more source

Quinazoline-containing Hydrazydes of Dicarboxylic Acids and Products of Their Structural Modification – A Novel Class of Anti-inflammatory Agents

open access: yesActa Chimica Slovenica, 2021
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
doaj   +1 more source

Synthesis, characterisation and DFT studies of [3,5-bis(2-hydroxyphenyl)-1H-1,2,4-triazol-1-yl](phenyl)methanone derivatives

open access: yesResults in Chemistry, 2021
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
doaj   +1 more source

Pharmacological aspects of hydrazides and hydrazide derivatives

open access: yesHealth Promotion & Physical Activity, 2017
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.
openaire   +1 more source

Novel one-pot process for the synthesis of ethyl 2-imino-4-methyl-2,3-dihydrothiazole-5-carboxylates [PDF]

open access: yesJournal of the Serbian Chemical Society, 2015
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
doaj   +1 more source

Organic solvent-free synthesis of sulfonyl hydrazides in water

open access: yesTetrahedron Green Chem, 2023
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
doaj   +1 more source

Synthesis and Antioxidant Activity of Some New Coumarinyl-1,3-Thiazolidine-4-ones

open access: yesMolecules, 2010
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
doaj   +1 more source

Phthaloylation of amines, hydrazines, and hydrazides by N-substituted phthalimides using recyclable sulfated polyborate

open access: yesResults in Chemistry, 2022
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
doaj   +1 more source

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