Results 1 to 10 of about 26,685 (297)

Ceria-Based Mixed Oxide Supported Nano-Gold as an Efficient and Durable Heterogeneous Catalyst for Oxidative Dehydrogenation of Amines to Imines Using Molecular Oxygen [PDF]

open access: yesBulletin of Chemical Reaction Engineering & Catalysis, 2012
The present work is intended to determine the catalytic activity of Mixed Oxide supported gold for aerobic oxidative dehydrogenation of amines to imines using Ceria as a main constituent of the each support. The model catalysts Au/CeO2:TiO2 Au/CeO2:SiO2,
Bashir Ahmad Dar   +2 more
doaj   +2 more sources

Mechanochemical Synthesis of Fluorinated Imines

open access: yesMolecules, 2022
A number of imines, including 12 new compounds, previously not reported in the literature, derived from variously fluorinated benzaldehydes and different anilines or chiral benzylamines were synthesized by a solvent-free mechanochemical method, which was
Karolina Ciesielska   +3 more
doaj   +2 more sources

Recent Advances in the Domino Annulation Reaction of Quinone Imines

open access: yesMolecules
Quinone imines are important derivatives of quinones with a wide range of applications in organic synthesis and the pharmaceutical industry. The attack of nucleophilic reagents on quinone imines tends to lead to aromatization of the quinone skeleton ...
Zhen-Hua Wang   +7 more
doaj   +2 more sources

Cycloruthenated Imines: A Step into the Nanomolar Region [PDF]

open access: yesMolecules
A new series of promising and easily accessible antiproliferative agents based on cycloruthenated imines of benzene and thiophene carbaldehydes has been developed and fully characterized using UV-Vis spectroscopy, X-ray diffraction, NMR, HRMS, and cyclic
Arsenii A. Vasil’ev   +6 more
doaj   +2 more sources

Asymmetric Reactions of N-Phosphonyl/Phosphoryl Imines

open access: yesMolecules, 2023
The asymmetric reactions of imines continued to attract the attention of the scientific community for decades. However, the stereoselective reactions of N-phosphonyl/phosphoryl imines remained less explored as compared to other N-substituted imines.
Devalina Ray   +3 more
doaj   +1 more source

Determination of some imines structures derived from salicylaldehyde with phenylene diamines by physical methods [PDF]

open access: yesKirkuk Journal of Science, 2012
The project is concerned with the preparation of four imines derived from salicylaldehyde with some aromatic primary amines, namely, o,m and p–phenylene diamine.These imines were identified by physical means available, namely the melting points, UV
A.S.P. Azzouz   +2 more
doaj   +1 more source

A Comparative Study of the Values of Ionization Constants for Acid Compounds Derived from N-formyl pipyidines [PDF]

open access: yesمجلة التربية والعلم, 2012
The paper is concerned with the determination of pKa or pK′a values for a new fourteen imines by potentometric titration method. These imines are prepared from the mother compound the N- formyl pipyidines in a forms of oximes, phenolic Schiff bases ...
Adel Azzouz, Heba El Mawla
doaj   +1 more source

Influence of percentages of ethanol alcohol on the acidity and basal of various imines derived from N-formylpipridine [PDF]

open access: yesمجلة التربية والعلم, 2012
The project describes the influence of five different percentages of ethanol in a range between (10-50)% in a mixture of ethanol-water on the acidity of thirteen imines as derived from N-formyl-pipyridine. These five percentages of ethanol-water mixtures
Adel Azzouz, Heba El Mawla
doaj   +1 more source

Electronic interaction and oxygen vacancy engineering of g-C3N4/α-Bi2O3 Z-scheme heterojunction for enhanced photocatalytic aerobic oxidative homo-/hetero-coupling of amines to imines in aqueous phase

open access: yesGreen Carbon, 2023
Photocatalytic oxidation coupling of amines represents a green and cost-effective method for the synthesis of highly value-added imines under visible light irradiation. However, the catalytic efficiency was severely limited by poor visible light response
Yanhua Gao   +4 more
doaj   +1 more source

Comparison of pKa values for some phenols imines derived from 3-acetyl and 4-acetyl pyridines. [PDF]

open access: yesمجلة التربية والعلم, 2013
The study includes the preparation of a new six imines derived from the mother ketones, namely the 3-acetyl and 4-acetyl pyridines. These imines containing phenols groups in ortho, meta and para positions on aromatic amine side of the molecules.
Adel Azzouz, R Uezbaky
doaj   +1 more source

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