Results 1 to 10 of about 17,166 (251)

Reactivity of aminophenols in forming nitrogen-containing brown carbon from iron-catalyzed reactions

open access: yesCommunications Chemistry, 2022
Iron is the most abundant redox active transition metal in mineral dust, but its role in nitrogen-containing organic carbon formation remains largely unexplored. Here, the authors show that Fe(III) catalyzes the dark oxidative oligomerization of o- and p-
Hind A. Al-Abadleh   +7 more
doaj   +2 more sources

Tuning the electronic states of Pd(II) defect-engineered metal-organic framework catalysts for efficient conversion of isocyanides [PDF]

open access: yesCommunications Chemistry
Recently, defective sites in MOFs have become an important tool for tuning the catalytic performance of MOFs. Herein, we report a heterogeneous catalyst “Pd-UiO-67(N)x” by utilizing the active site of defective MOF to modulate the electronic state of Pd,
Shaoting Su   +4 more
doaj   +2 more sources

Selective alkylation of aminophenols [PDF]

open access: yesARKIVOC, 2010
Oor N-Alkylated derivatives of aminophenols are important synthetic intermediates in organic synthesis. A series of aminophenols were selectively alkylated on their hydroxyl group in good yields via benzaldehyde protection of the amino group, subsequent alkylation, and hydrolysis; or on their amino group via imination and following reduction.
Jiaxi Xu, Renchao Wang
doaj   +2 more sources

General Synthesis of 2-Substituted Benzoxazoles Based on Tf2O-Promoted Electrophilic Activation of Tertiary Amides [PDF]

open access: yesMolecules
We report a method for the synthesis of 2-substituted benzoxazoles from tertiary amides and 2-aminophenols in the presence of triflic anhydride (Tf2O) and 2-Fluoropyridine (2-F-Pyr).
Hongchen Li   +4 more
doaj   +2 more sources

Recent Progress on Covalent Organic Frameworks Supporting Metal Nanoparticles as Promising Materials for Nitrophenol Reduction [PDF]

open access: yesNanomaterials
With the utilization of nitrophenols in manufacturing various materials and the expansion of industry, nitrophenols have emerged as water pollutants that pose significant risks to both humans and the environment.
Mohammad Dinari   +5 more
doaj   +2 more sources

Straightforward Access to Pentafluorosulfanylated Phenols and Aminophenols via [4 + 2] Diels–Alder Cycloaddition Reaction [PDF]

open access: yesACS Organic & Inorganic Au
Mariam Abd El Sater   +5 more
doaj   +2 more sources

Towards Efficient Catalysts via Biomimetic Chemistry for Diphenols and Aminophenols Aerobic Oxidation [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2023
Biomimetic chemistry is a new environment-friendly approach that is inspired by biological processes, to produce new catalysts, and to develop ‘green’ synthetic routes to chemical catalysts based on the benefits of biological systems, aimed to find ...
Abdeslam Mouadili   +2 more
doaj   +1 more source

An Optimised Method to Synthesise N5O2 Aminophenols

open access: yesChemistry Proceedings, 2023
Aminophenol compounds are usually employed in coordination chemistry due to their versatility to form metal complexes. Heptadentate N5O2 aminophenol ligands can lead to the formation of lanthanoid complexes with pentagonal bypiramidal (pbp) geometry ...
Paula Oreiro-Martínez   +3 more
doaj   +1 more source

Protecting-group-free enantioselective tandem allylic substitution of o-phenylenediamines and o-aminophenols

open access: yesGreen Synthesis and Catalysis, 2022
A protecting-group-free enantioselective tandem allylic substitution of o-phenylenediamines and o-aminophenols is realized for the first time with a Pd-WingPhos catalyst, providing expedient access to a series of chiral vinyl-substituted heterocycles in ...
Xuehua Kang   +5 more
doaj   +1 more source

Synthesis of Chiral 1,4,2-Oxazaphosphepines

open access: yesMolecules, 2015
Synthesis and structural characterization of 1,4,2-oxazaphosphepines is described. The 1,4,2-oxazaphosphepines were obtained from reaction of chiral 1,3-benzoxazines with dichlorophenylphosphine or triethyl phosphite.
Oscar Salgado-Escobar   +4 more
doaj   +1 more source

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