نتایج جستجو برای: hydrazone

تعداد نتایج: 2025  

Jabbar Khalafy Karim Akbari Dilmaghani, Mina Mohammadzadeh Nader Noroozi Pesyan, Saeed Rastgar, Zahra Malekpoor,

The NMR spectra of azo dyes, 5-arylazobarbituric (5a-g), 5-arylazo-1,3-dimethylbarbituric(6a-g) and 5-arylazothiobarbituric acids (7a-g) were studied in DMSO-d6 in differentconcentrations. An intramolecular hydrogen bond was observed and indicating that thehydrazone forms is mostly predominant. The peak of the hydrazone proton was severelybroadened and its chemical shift appeared at down field ...

2012
Xiao-Yan Li

In the title compound, C(15)H(12)I(2)N(2)O(4)·CH(3)OH, the hydrazone mol-ecule exists in an E conformation with respect to the C=N bond. The dihedral angle between the rings is 11.9 (2)°. There is one intra-molecular O-H⋯N hydrogen bond in the hydrazone mol-ecule. In the crystal, the hydrazone and methanol mol-ecules are linked through O-H⋯O and N-H⋯O hydrogen bonds and C-H⋯O inter-actions to f...

Journal: :iranian journal of pharmaceutical research 0
mansur koopaei department of medicinal chemistry, pharmaceutical sciences branch, islamic azad university, tehran, iran. mohammad javad assarzadeh department of medicinal chemistry, pharmaceutical sciences branch, islamic azad university, tehran, iran. ali almasirad department of medicinal chemistry, pharmaceutical sciences branch, islamic azad university, tehran, iran. seyedeh farnaz ghasemi-niri department of pharmacology and toxicology, faculty of pharmacy and pharmaceutical sciences research center, tehran university of medical sciences, tehran, iran. mohsen amini department of medicinal chemistry, faculty of pharmacy and pharmaceutical sciences research center, tehran university of medical sciences, tehran, iran. abbas kebriaeezadeh department of pharmacology and toxicology, faculty of pharmacy and pharmaceutical sciences research center, tehran university of medical sciences, tehran, iran.

the uses of non-steroidal anti-inflammatory drugs (nsaids) are limited by a variety of side effects. so research on preparing new analgesic agents is important. according to some reports about the analgesic activity of hydrazide and hydrazine derivatives a new series of these compounds were synthesized in order to obtain new analgesic compounds. the final compounds 10a-10e and 15a-15d were prep...

2008
Nicholas R. Natale Monica I. Szabon-Watola Brendan Twamley Richard J. Bridges Sarjubhai Patel Trideep Rajale

The title compound, C(26)H(23)N(5)O(8), was prepared and its structure investigated to further develop a working hypothesis for the essential binding pharmacophore for ligands of the System Xc- transporter [Patel et al. (2004 ▶). Neuropharmacology, 46, 273-284]. The hydrazone group displays an E geometry and the isoxazole double bond and C=N group of the hydrazone are in an s-cis relationship. ...

Journal: :Chemical communications 2008
Zaida Rodriguez-Docampo Sijbren Otto

Hydrazone and disulfide exchange have been combined in a single system, but can be addressed independently: by adjusting the pH of the solution from acidic to mildly basic it is possible to switch from exclusively hydrazone exchange to exclusively disulfide exchange, while at intermediate pH both reactions occur simultaneously.

Journal: :Chemical communications 2018
Xujun Zheng Yang Zhang Guangcheng Wu Ji-Ren Liu Ning Cao Lei Wang Yan Wang Xiaopeng Li Xin Hong Chuluo Yang Hao Li

Using a novel dynamic covalent approach relying on reversible hydrazone formation, a purely organic 3-dimensional prismatic cage was developed in water at elevated temperatures. By lowering the temperature, the hydrazone bond becomes kinetically inert. This self-assembled cage acts as an effective receptor for donor-acceptor pairs, whose interactions are weak in the absence of the cage.

Journal: :Sains Malaysiana 2021

Two vanillin-hydrazone compounds as the colorimetric amine detection during chicken meat spoilage are described. hydrazone (1 and 2) have been synthesized from condensation reaction of vanillin with phenylhydrazine 2,4-dinitrophenylhydrazine. Their properties for recognition were determined by naked eye UV-vis spectra. indicators investigated toward primary amine: butylamine (BA); secondary dim...

2012
Jian Wu Jian Wang Deyu Hu Ming He Linhong Jin Baoan Song

BACKGROUND The plant pathogenic fungus (such as Gibberella zeae, Fusarium oxysporum and Cytospora mandshurica) causes devastating disease in agriculture. The pathogenic fungus is responsible for billions of dollars in economic losses worldwide each year. In order to discover new fungicidal molecule with good fungicidal activity against G. zeae, F. oxysporum, and C. mandshurica, we sought to com...

2012
Jian Wu Shenghong Kang Baoan Song Deyu Hu Ming He Linhong Jin Song Yang

BACKGROUND Ralstonia solanacearum, one of the most important bacterial diseases on plants, is a devastating, soil-borne plant pathogen with a global distribution and an unusually wide host range. In order to discover new bioactive molecules and pesticides acting on tobacco bacterial wilt, we sought to combine the active structure of hydrazone and pyridine together to design and synthesize a ser...

Journal: :European journal of medicinal chemistry 2010
Adnan S Abu-Surrah Kayed A Abu Safieh Iman M Ahmad Maher Y Abdalla Mikdad T Ayoub Abdussalam K Qaroush Ahmad M Abu-Mahtheieh

Reactions of 5-hydrazino-1,3-dimethyl-4-nitro-1H-pyrazole (1) with substituted benzaldehydes (2-5) in methanol gave the new substituted benzaldehyde (1,3-dimethyl-4-nitro-1H-pyrazol-5-yl)hydrazone Schiff base ligands (6-9) benzaldehyde (1,3-dimethyl-4-nitro-1H-pyrazol-5-yl)hydrazone (H-BDH, 6), 2,3-dimethoxybenzaldehyde (1,3-dimethyl-4-nitro-1H-pyrazol-5-yl)hydrazone (MeO-BDH, 7), 4-chlorobenza...

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