Results 1 to 10 of about 18,062 (258)

Research Progress on the Reaction of Carbon Dioxide with Hydrazones and Their Derivatives [PDF]

Molecules
CO2, an abundant and renewable C1 source, presents significant potential for applications in organic synthesis. Hydrazones, recognized for their distinctive properties, exhibit high versatility in synthetic chemistry, facilitating numerous chemical ...
Hong-Xia Sun, Shao-Xuan Gong, Hong-Yang Zhang, Yu-Ting Liu, Li-Ling Shi, Yong-Jie Zhu, Xiu-Mei Xie, Jun-Jie Li, Jing Wen, Yong-Chang Guan, Zhen Zhang, Miao Zhang, Yun-Feng Zhang   +12 more
doaj   +2 more sources

2,4-Dinitrobenzaldehyde hydrazone [PDF]

Acta Crystallographica Section E Structure Reports Online, 2008
The title compound, C(7)H(6)N(4)O(4), plays an important role in the synthesis of biologically active compounds. The planar hydrazone group is oriented at a dihedral angle of 8.27 (3)° with respect to the benzene ring. In the crystal structure, inter-molecular N-H⋯O and N-H⋯N hydrogen bonds link the mol-ecules.
Zhang, N., Wang, R. J., Tan, C. Y., Jiang, Y. Y., Zhao, Y. F.   +4 more
openaire   +3 more sources

Hydrazones as Singular Reagents in Asymmetric Organocatalysis [PDF]

, 2016
This Minireview summarizes strategies and developments regarding the use of hydrazones as reagents in asymmetric organocatalysis, their distinct roles in nucleophile–electrophile, cycloaddition, and cyclization reactions.
Fernández Fernández, Rosario Fátima, Lassaletta, José M., Matador Martínez, Esteban, Monge Fernández, David, Retamosa Hernández, María Gracia   +4 more
core   +3 more sources

Synthesis and antibacterial evaluation of novel hydrazones and bis-hydrazones containing 1,2,3-triazole moiety

Journal of Taibah University for Science, 2022
The current work reports the synthesis of novel hydrazones and bis-hydrazones containing 1,2,3-triazole moiety. Base-assisted aldol condensation of 4-acetyl-1,2,3-triazole 1a (R = NO2) and anisaldehyde (2) gave the corresponding chalcone 3 in 88% yield ...
Mohammed A. Baashen
doaj   +1 more source

Chemical Storage of Solar Energy Using Hydrazones [PDF]

Kirkuk Journal of Science, 2013
Hydrazones derived from 4- phenoxybutanoic acid were reprepared and their oxidation potentials in Micellar-Ethanol solution were measured using cyclic voltammetric technique.
Nashwan O. Tapabashi
doaj   +1 more source

New possibilities of the functionalization of 6-hydrazino-1,3-dimethyluracils: one-pot synthesis of 5,7-dimethylpyrazolopyrimidine-4,6-dione and 1,3-dimethyl-5-arylidenebarbituric acid derivatives

Chimica Techno Acta, 2021
3-aryl-5,7-dimethylpyrazolopyrimidine-4,6-diones and 5-benzylidene-1,3-dimethylpyrimidine-2,4,6-triones were obtained by heating hydrazones of 1,3-dimethyl-6 -hydrazinouraciles in trifluoroacetic acid (TFA).
Yu. A. Azev, O. S. Koptyaeva, T. A. Pospelova   +2 more
doaj   +1 more source

Attempts to Access a Series of Pyrazoles Lead to New Hydrazones with Antifungal Potential against Candida species including Azole-Resistant Strains

Molecules, 2021
The treatment of benzylidenemalononitriles with phenylhydrazines in refluxing ethanol did not provide pyrazole derivatives, but instead furnished hydrazones. The structure of hydrazones was secured by X-ray analysis.
Georgiana Negru, Laure Kamus, Elena Bîcu, Sergiu Shova, Boualem Sendid, Faustine Dubar, Alina Ghinet   +6 more
doaj   +1 more source

Terpenoid Hydrazones as Biomembrane Penetration Enhancers: FT-IR Spectroscopy and Fluorescence Probe Studies

Molecules, 2021
Hydrazones based on mono- and bicyclic terpenoids (verbenone, menthone and carvone) have been investigated in vitro as potential biomembrane penetration enhancers.
Mariia Nesterkina, Serhii Smola, Nataliya Rusakova, Iryna Kravchenko   +3 more
doaj   +1 more source

A simple procedure for synthesis of 3H-quinazolin-4-one hydrazones under mild conditions

Journal of Saudi Chemical Society, 2014
Condensation of 6-bromo- and 6,8-dibromo-2-hydrazino-3-phenyl-3H-quinazolin-4-ones with d-sugars in the presence of a catalytic quantity of glacial acetic acid gave the corresponding hydrazones in good yields.
Mohamed F. Abdel-Megeed, Mohamed M. Azaam, Gamal A. El-Hiti   +2 more
doaj   +1 more source

Synthesis of Some Substituted 1,3,4-Oxadiazoles from Hydrazones [PDF]

مجلة التربية والعلم, 2009
In this paper the synthesis of some 2-(3-pyridyl)-5-aryl-1,3,4-oxadiazoles from hydrazones is reported. Nicotinic acid was converted to ethyl nicotinate (1) by its reaction with thionyl chloride and the resultant acid chloride was treated with absolute ...
Khalid Daoud, A. Ahmad, Amal Ali
doaj   +1 more source