Results 21 to 30 of about 34,049 (283)

Periselectivity in the Aza-Diels–Alder Reaction of 1-Azadienes with α-Oxoketenes: A Combined Experimental and Theoretical Study

open access: yesMolecules, 2020
Inversions in the periselectivity of formal aza-Diels–Alder cycloadditions between α-oxoketenes generated by a thermally-induced Wolff rearrangement and 1-azadienes were observed experimentally as a function of the α-oxoketene and the 1-azadiene, as well
Marc Presset   +4 more
doaj   +1 more source

Schiff Bases: Interesting Scaffolds with Promising Antitumoral Properties

open access: yesApplied Sciences, 2021
Schiff bases, named after Hugo Schiff, are highly reactive organic compounds broadly used as pigments and dyes, catalysts, intermediates in organic synthesis, and polymer stabilizers.
Domenico Iacopetta   +6 more
doaj   +1 more source

Determination of Stability for imines derived from carbonyl compounds by conductivity measurements

open access: yesTikrit Journal of Pure Science, 2018
The project explained for the first time, how conductivity method was used in the determination of stability of some imines derived from mother compounds 2-acetyl pyridine, 3 or 4 –hydroxy benzaldehyde, and others. The method as found, simple precise
A.S.P. Azzouz, D.B.AL-Bakzo
doaj   +1 more source

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   +1 more source

Synthesis and Reactions of New 4-Oxo-4H-benzopyran-3-carboxaldehydes Containing Hydroxy Groups or 2-Oxopyran Cycles

open access: yesMolecules, 1998
The synthesis of eight hydroxy- and 2-oxopyranochromone-3-carboxaldehydes 3, 5 and their reactions with 2-hydroxyaniline, 2,4-dinitrophenylhydrazine and 2-benzothiazolylhydrazine were investigated.
Hafez M. El-Shaaer   +4 more
doaj   +1 more source

Old Dogs with New Tricks: Antiparasitic Potential of Structurally Diverse 5-Nitrofuran and 5-Nitrothiophene Imines and Acyl Hydrazones

open access: yesScientia Pharmaceutica, 2023
Miscellaneous imines and acyl hydrazones were prepared from 5-nitrofuraldehyde and 5-nitrothiophene-2-carboxaldehyde. Their activities against Toxoplasma gondii and Leishmania major parasites were evaluated.
Ibrahim S. Al Nasr   +4 more
doaj   +1 more source

Harnessing Fungal Biowelding for Constructing Mycelium‐Engineered Materials

open access: yesAdvanced Engineering Materials, EarlyView.
Mycelium‐bound composites (MBCs) offer low‐carbon alternatives for construction, yet interfacial bonding remains a critical challenge. This review examines fungal biowelding as a biocompatible adhesive, elucidating mycelium‐mediated interfacial mechanisms and their role in material assembly. Strategies to optimize biowelding are discussed, highlighting
Xue Brenda Bai   +2 more
wiley   +1 more source

MnI‐Functionalized Covalent Organic Framework as Efficient Electrocatalyst for CO2 Reduction in a Catholyte‐Free Zero‐Gap Electrolyzer

open access: yesAdvanced Functional Materials, EarlyView.
This work demonstrates the successful integration of a phenanthroline‐based 2D COF with MnI catalytic sites into a catholyte‐free membrane‐electrode‐assembly cell for CO2 electroreduction. The crystalline COF actively suppresses Mn⁰–Mn⁰ dimerization, achieving a turnover frequency of 617 h⁻¹ at 2.8 V (full‐cell potential), and enabling stable operation.
Laura Spies   +8 more
wiley   +1 more source

Flexibility and Dynamicity Enhances and Controls Supramolecular Self‐Assembly of Zinc(II) Metallogels

open access: yesAdvanced Functional Materials, EarlyView.
Zinc(II) coordination complexes with tunable aryloxy‐imine ligands exhibit controllable supramolecular self‐assembly into hierarchical fibrous structures. Coordination‐driven stacking, not π–π interactions, enables gelation, dynamic assembly/disassembly, and enhanced nanomechanical properties.
Merlin R. Stühler   +10 more
wiley   +1 more source

Metal Complexes with Schiff Bases as Antimicrobials and Catalysts

open access: yesInorganics, 2023
Complexes of Schiff bases (SBs) with metals are promising compounds exhibiting a broad range of applications, such as catalysts, polymers, dyes, and several biological activities, including antimicrobial, anticancer, antioxidant, antimalarial, analgesic,
Domenico Iacopetta   +7 more
doaj   +1 more source

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