Results 11 to 20 of about 21,034 (299)

Advances in Analytical Determination Methods and Toxicity and Health Risk Assessment of 6PPD and Its Transformation Products in Food [PDF]

open access: yesToxics
N-(1,3-Dimethylbutyl)-N’-phenyl-p-phenylenediamine (6PPD) is a member of the p-phenylenediamines (PPDs), recognized as a highly effective antioxidant. It has been extensively employed in the automotive tire manufacturing industry, and plays a critical ...
Bolin Liu   +5 more
doaj   +2 more sources

Metal-catalyzed coupling/carbonylative cyclizations for accessing dibenzodiazepinones: an expedient route to clozapine and other drugs [PDF]

open access: yesBeilstein Journal of Organic Chemistry
A sequential strategy to access 10,11-dihydro-5H-dibenzo[b,e][1,4]diazepinones (DBDAPs) is disclosed in this article through a palladium and copper-catalyzed amination (Buchwald–Hartwig (B–H) or Chan–Lam (C–L)) followed by a palladium-catalyzed ...
Amina Moutayakine, Anthony J. Burke
doaj   +2 more sources

Sustainable Synthesis of 1,2-Disubstituted Benzimidazoles as Promising α-Glucosidase Inhibitors: In Vitro and In Silico Evaluation [PDF]

open access: yesPharmaceuticals
Background: Inhibiting α-glucosidase and α-amylase is a well-established strategy for managing postprandial hyperglycemia in type 2 diabetes mellitus. However, the adverse effects of current α-glucosidase inhibitors (α-GIs) underscore the need for safer ...
Graziella Tocco   +5 more
doaj   +2 more sources

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

Green SDS-assisted synthesis of quinoxaline derivatives in the water [PDF]

open access: yesشیمی کاربردی روز, 2016
A simple, practical and convenient procedure for the synthesis of quinoxaline derivatives has been developed by reaction of 1,2-phenylenediamines with 1,2-diketones in the presence of sodium dodecyl sulfate (SDS) in the aqueous medium at room temperature
Elham Ghobadi   +2 more
doaj   +1 more source

Polystyrene-supported pyridinium chloroaluminate ionic liquid as a new heterogeneous Lewis acid catalyst for selective synthesis of benzimidazoles [PDF]

open access: yesJournal of the Serbian Chemical Society, 2013
Polystyrene-supported pyridinium chloroaluminate ionic liquid was prepared from the reaction of Merrifield resin with pyridine followed by reaction with aluminium chloride.
Parvanak Boroujeni Kaveh   +2 more
doaj   +1 more source

Electrochemical amination of N,N-dimethylaniline

open access: yesУчёные записки Казанского университета: Серия Естественные науки, 2021
The process of indirect cathodic amination of N,N-dimethylaniline using the Ti(IV) – NH2OH system was studied in aqueous solutions of 7–16 M sulfuric acid at 40 ?C.
Yu.A. Lisitsyn
doaj   +1 more source

Sensitization and Clinically Relevant Allergy to Hair Dyes and Clothes from Black Henna Tattoos: Do People Know the Risk? An Uncommon Serious Case and a Review of the Literature

open access: yesCosmetics, 2016
Henna (Lawsonia inermis L.) tattooing has been used in Egypt and India since ancient times. Today this temporary body art is becoming increasingly popular among young people.
Paola A. Moro   +5 more
doaj   +1 more source

A novel approach toward the synthesis of some new tridentate Schiff bases from anil-like compounds [PDF]

open access: yesJournal of the Serbian Chemical Society, 2016
A novel method was developed for synthesizing a series of new three dentate Schiff base ligands starting from hydroxynaphthalidene pyrimidinyl amines with o-phenylenediamines or o-aminophenol or 2-amino-3-hydroxy-pyri-dine in the presence of ...
Bagheri Fatemeh, Olyaei Abolfazl
doaj   +1 more source

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