Results 71 to 80 of about 9,914 (265)
Beilstein Journal of Organic ChemistryFor the first time, the interaction of aroyl containing pyrano[2,3-d]isoxazolone derivatives with various hydrazines was studied. It was shown that the considered process includes formation of corresponding hydrazones followed by Boulton–Katritzky ...
Constantine V. Milyutin +2 more
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Síntese e avaliação preliminar da atividade antinociceptiva de novas isoxazolil-aril-hidrazonas
Química Nova, 2011 New 2-isoxazoline aldehydes were synthesized, in good yields, from cycloadduct of the 1,3-dipolar cycloaddition reaction between endocyclic enecarbamate and carboethoxyformonitrile oxide (CEFNO). Condensation of these 2-isoxazoline aldehydes with several
Sílvio Leandro Gonçalves Bomfim Reis +8 more
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, 2014 Citation: 'hydrazines' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.H02881 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire +1 more source
Novel biodegradable protonic ionic liquid for the Fischer indole synthesis reaction
Green Chemistry Letters and Reviews, 2016 Novel eco-friendly tetramethylguanidinium propanesulfonic acid trifluoromethylacetate ([TMGHPS][TFA]) ionic liquid was developed as catalyst and medium for the Fischer indole synthesis of a wide variety of hydrazines and ketones. The indole products were
William C. Neuhaus +4 more
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Microwave-Assisted Synthesis of Some 3,5-Arylated 2-Pyrazolines
Molecules, 2003 Condensation of 2-acetylnaphthalene with benzaldehydes under microwave irradiation affords chalcones which undergo facile and clean cyclizations with hydrazines RNHNH2 (R= H, Ph, Ac) to afford 3,5-arylated 2-pyrazolines in quantitative yields, also under
Hassan Ghasemnejad, Davood Azarifar
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Methanolysis of Benzoyl hydrazines in the presence of Trifluoromethanesulfonic acid
, 2023 Methanolysis of variously substituted benzoyl hydrazines in the presence of CF3SO3H was explored for the first time. The effects of CF3SO3H acid concentration and substituents attached to benzoyl hydrazine on yield and reaction times were also examined.
Ul Haq, Intasar
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Quantum Mechanical and Molecular Mechanics (MM3) Studies of Hydrazines
, 2016 The structures, conformational energies, and vibrational frequencies of hydrazines have been studied at 6-31G** MP2 and 6-31G** B3LYP levels. Our theoretical structures generally agree with the available experimental data.
Jenn-Huei Lii (1824316) +3 more
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Molecules, 2011 Enaminone 1 was reacted with hydrazonoyl halides 2a-d to yield 3,4-disubstituted pyrazoles 6a-d. Coupling with arenediazonium chlorides afforded the 2-(arylhydrazono)-3-(1-naphthalenyl)-3-oxopropionaldehydes 13a-c.
Huwaida M. E. Hassaneen
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Kinetic Spectrophotometric Determination of Propellant Grade Hydrazines using Thiophenes with Active Carbonyl Groups [PDF]
, 2014 A simple, cost effective, highly sensitive and rapid kinetic spectrophotometric method was developed for hydrazines by using Thiophene-3-carboxaldehyde (3-Thienaldehyde) and 3-Butenone (E)-1,1,1-trifluoro-4-(3-thienyl) (CF3 enone). CF3 enone was prepared
Subramanian, Selvakumar +2 more
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