Results 91 to 100 of about 26,379 (326)

Asymmetric Transfer Hydrogenations of 2,3-Disubstituted Quinoxalines with Ammonia Borane.

Organic Letters, 2017
An asymmetric transfer hydrogenation of 2,3-disubstituted quinoxalines using a chiral frustrated Lewis pair of Piers' borane and (R)-tert-butylsulfinamide as the catalyst with ammonia borane as the hydrogen source has been successfully realized.
Songlei Li, Wei Meng, H. Du
semanticscholar   +1 more source

Organic Interlayer for Enhanced Buried Interfaces in Wide‐Bandgap Perovskite Solar Cells

ChemSusChem, EarlyView.
High‐performance, stable wide‐bandgap perovskite solar cells (PSCs) are vital for tandem cell development, yet nonradiative interfacial recombination limits efficiency. Herein, a donor–acceptor quinoxaline‐based interlayer is introduced (QxNN) at the NiOx/perovskite interface in p‐i‐n PSCs. This interlayer passivates defects, enhances charge extraction
JeeHee Hong, Yu Kyung Lee, Seoungyun Shin, Dong Ryeol Whang, Dong Wook Chang, Hui Joon Park   +5 more
wiley   +1 more source

Efficient and Practical Protocol for the Synthesis of Pyridopyrazines, Pyrazines and Quinoxalines Catalyzed by La(OAc)3 in Water [PDF]

Iranian Journal of Chemistry & Chemical Engineering, 2013
La(OAc)3 has been used as an efficient catalytic system for the synthesis of quinoxalines. This method provides several advantages over methods that are currently employed such as a simple work-up, mild reaction conditions, good to excellent yields, and ...
Ghasem Rezanejade Baradajee, Ali Mohamadi   +1 more
doaj  

α,β‐Alkylation Reactions Catalyzed by Ruthenium Triphenylphosphine Complexes Bearing Substituted Pyridine–Quinoline Based Ligands

European Journal of Inorganic Chemistry, EarlyView.
A series of new air‐stable ruthenium(II) bis‐triphenylphosphine complexes comprising substituted pyridine–quinoline ligands have been developed via a one‐pot procedure. The new complexes successfully serve as scaffolds to promote catalytic CC bond formation, more precisely the α‐alkylation of ketones with primary alcohols, via the borrowing hydrogen ...
Nikolaos Zacharopoulos, Panagiotis‐Georgios Kanellopoulos, Evangelos Bakeas, Antigoni Cheilari, Gregor Schnakenburg, Athanassios Chrissanthopoulos, Athanassios Philippopoulos   +6 more
wiley   +1 more source

Quinoxaline 1,4-di-N-oxide and the Potential for Treating Tuberculosis [PDF]

, 2011
New drugs active against drug-resistant tuberculosis are urgently needed to extend the range of TB treatment options to cover drug resistant infections.
Aldana, I. (Ignacio), Ancizu, S. (Saioa), Burguete, A. (Asunción), Goldman, R.C. (Robert C.), Jaso, A. (Andrés), Marin, A. (Adoración), Monge, A. (Antonio), Pérez-Silanes, S. (Silvia), Solano, B. (Beatriz), Vicente, E. (Esther), Villar, R. (Raquel), Zarranz, B. (Belén)   +11 more
core  

Exploring novel antitubercular agents: Innovative design of 2,3-diaryl-quinoxalines targeting DprE1 for effective tuberculosis treatment

Open Chemistry
The rising instances of drug resistance in Mycobacterium tuberculosis strains pose a significant global health challenge. Conventional tuberculosis (TB) treatments, which typically involve multiple antibiotics, face hurdles like drug resistance, reduced ...
Sharma Kirti, Sharma Atul, Sanduja Mohit, Jogpal Vikas, Mishra Asim Kumar, Kumar Girish, Virmani Tarun, Noman Omar M., Alhalmi Abdulsalam   +8 more
doaj   +1 more source

Phospho Sulfonic Acid Catalyzed Synthesis of Benzimidazole, Benzoxazole and Quinoxaline Derivatives under Green Solvent at Ambient Temperature [PDF]

Journal of Sciences, Islamic Republic of Iran, 2016
Phospho sulfonic acid (PSA) synthesized as an environmentally safe and efficient solid acid catalyst, and it used for the synthesis of several 2-disubstituted benzimidazoles, 2-substituted benzoxazoles, and 2-substituted quinoxalines in ethanol as a ...
S. Rezayati, M. Mehmannavaz, E. Salehi, Sh. Haghi, R. Hajinasiri, S. Afshari Sharif Abad   +5 more
doaj  

Electrochemical Hydrogenation of N‐Heterocycles and Related Substrates: A Mini‐Review

Electrochemical Science Advances, EarlyView.
ABSTRACT Catalytic hydrogenation refers to the (often) metal‐mediated addition of dihydrogen (H2) equivalents to unsaturated compounds to form new element‐hydrogen bonds. This conceptually simple reaction is ubiquitous in the production of a vast number of essential chemicals.
Esteban Garcia‐Torres, David E. Herbert   +1 more
wiley   +1 more source

FLT3 inhibition in acute myeloid leukaemia [PDF]

, 2007
FMS-like tyrosine kinase 3 (FLT3) is a receptor tyrosine kinase that appears to play a significant role in leukaemogenesis. Activating mutations of FLT3 are present in approximately one-third of acute myeloid leukaemia patients and are associated ...
Knapper, Steven
core   +1 more source

Efficient Syntheses of Diverse N-Heterocycles: The Molybdenum(VI)-Catalyzed Reductive Cyclization of Nitroarenes using Pinacol as a Deoxygenating­ Agent

SynOpen, 2018
Molybdenum(VI)-catalyzed domino reductive cyclization of nitroarenes has been devised for the syntheses of 1,4-benzoxazines and 1,4-benzothiazines in the presence of pinacol as deoxygenating agent.
Raghuram Gujjarappa, Nagaraju Vodnala, Arup K. Kabi, Dhananjaya Kaldhi, Mohan Kumar, Uwe Beifuss, Chandi C. Malakar   +6 more
doaj   +1 more source