Results 1 to 10 of about 130 (118)

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

Green 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, Chao Qian, He Yang, Jicheng Shi, Jerome Claverie, Wenjun Tang   +5 more
doaj   +1 more source

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

شیمی 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, Marjan Peiravi, Eskandar Kolvari   +2 more
doaj   +1 more source

Heterocyclic Synthesis of Crowded Aposafranones: Structure of 1‐Methyl‐8‐dimethylamino‐10‐phenylphenazin‐2‐(10H)one and Related Compounds

ChemistryOpen, 2023
Oxidative condensation of three p‐phenylenediamines with 3‐hydroxy‐2‐methyl‐N‐(phenylamino)benzene gives new coloured aposafranones. 2‐Methylresorcinol is easy to convert into the asymmetric building block 3‐hydroxy‐2‐methyl‐N‐(phenylamino)benzene with ...
Dr. M. John Plater, Prof. Dr. William T. A. Harrison   +1 more
doaj   +1 more source

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

Journal 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, Zhianinasab Ashkan, Jafarinasab Mina   +2 more
doaj   +1 more source

Electrochemical amination of N,N-dimethylaniline

Учёные 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

Cosmetics, 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, Marco Morina, Fabrizia Milani, Marco Pandolfi, Francesca Guerriero, Luca Bernardo   +5 more
doaj   +1 more source

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

Journal 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

Hydrogenative coupling of nitriles with diamines to benzimidazoles using lignin-derived Rh2P catalyst

iScience, 2021
Summary: Nitrile (C≡N bond) activation for direct organic synthesis has been less explored so far due to a high redox potential of nitrile and its low dissociation energy of C−CN bond.
Jiarui Zhang, Ruxu Yao, Jinzhu Chen, Tao Li, Yisheng Xu   +4 more
doaj   +1 more source

SYNTHESIS AND IN-VITRO CYTOTOXIC ACTIVITY OF NOVEL BENZO[b]PHENAZINE-6,11-DIONE AND 1,4- NAPHTHOQUINONE DERIVATIVES [PDF]

Bulletin of Pharmaceutical Sciences. Assiut University, 2008
5,12-Dihydrobenzophenazine-6,11-diones,2-Arylamino-3-chloro-1,4-naphthoquinones and 6,11-dihydrobenzo[b]phenazine-6,11-diones, were synthesized from 2,3-dichloro-1,4-naphthoquinoneand arylamines/phenylenediamines.
Eman Noaman, Magda F. Ismail, Maha A. Khalifa   +2 more
doaj   +1 more source

Switchable highly regioselective synthesis of 3,4-dihydroquinoxalin-2(1H)ones from o-phenylenediamines and aroylpyruvates

Beilstein Journal of Organic Chemistry, 2017
3-Acylmethylidene-3,4-dihydroquinoxalin-2(1H)-ones are compounds which possess a wide range of physical and pharmaceutical applications. These compounds can be easily prepared by cyclocondensation of o-phenylenediamines and aroylpyruvates ...
Juraj Dobiaš, Marek Ondruš, Gabriela Addová, Andrej Boháč   +3 more
doaj   +1 more source