Results 1 to 10 of about 25,177 (318)

A Green, Scalable, and Catalyst-Free One-Minute Synthesis of Quinoxalines [PDF]

open access: yesSynOpen, 2021
A highly efficient and catalyst-free protocol is reported for the synthesis of quinoxalines via the classical cyclocondensation reaction between aryldiamines and dicarbonyl compounds.
Vijayaragavan Elumalai, Jørn H. Hansen
doaj   +4 more sources

Synthesis of Functionalized 3H-pyrrolo-[1,2,3-de] Quinoxalines via Gold-Catalyzed Intramolecular Hydroamination of Alkynes [PDF]

open access: yesMolecules, 2023
A gold-catalyzed protocol to obtain functionalized 3H-pyrrolo [1,2,3-de] quinoxalines from suitable substituted N-alkynyl indoles has been proposed. The mild reaction conditions were revealed to be compatible with different functional groups, including ...
Antonia Iazzetti   +5 more
doaj   +5 more sources

Novel Synthetic Routes to Prepare Biologically Active Quinoxalines and Their Derivatives: A Synthetic Review for the Last Two Decades

open access: yesMolecules, 2021
Quinoxalines, a class of N-heterocyclic compounds, are important biological agents, and a significant amount of research activity has been directed towards this class.
Hena Khatoon, Emilia Abdulmalek
doaj   +2 more sources

Quinoxaline derivatives as attractive electron-transporting materials [PDF]

open access: yesBeilstein Journal of Organic Chemistry, 2023
This review article provides a comprehensive overview of recent advancements in electron transport materials derived from quinoxaline, along with their applications in various electronic devices. We focus on their utilization in organic solar cells (OSCs)
Zeeshan Abid   +5 more
doaj   +2 more sources

Protocol for stereodivergent asymmetric hydrogenation of quinoxalines [PDF]

open access: yesSTAR Protocols, 2023
Summary: Chiral 1,2,3,4-tetrahydroquinoxalines are ubiquitous in natural products and bioactive molecules. Herein, we disclose a protocol for stereodivergent asymmetric hydrogenation of disubstituted quinoxalines for the preparation of both cis- and ...
Mingyang Wang, Chenguang Liu, Qiang Liu
doaj   +2 more sources

Synthesis and Antimicrobial Activity of Some New Substituted Quinoxalines

open access: yesMolecules, 2019
A number of new symmetrically and asymmetrically 2,3-disubstituted quinoxalines were synthesized through functionalization of 2,3-dichloroquinoxaline (2,3-DCQ) with a variety of sulfur and/or nitrogen nucleophiles.
Mohamed A. El-Atawy   +3 more
doaj   +2 more sources

An Effective Microwave-Induced Iodine-Catalyzed Method for the Synthesis of Quinoxalines via Condensation of 1,2-Diamines with 1,2-Dicarbonyl Compounds [PDF]

open access: yesMolecules, 2010
A microwave-induced iodine-catalyzed simple, rapid and convenient synthesis of different types of quinoxalines via condensation of 1,2-diamines with 1,2-dicarbonyl compounds has been accomplished with an excellent yield.
Debasish Bandyopadhyay   +3 more
doaj   +3 more sources

Benzylic C–H Oxidation: Recent Advances and Applications in Heterocyclic Synthesis [PDF]

open access: yesMolecules
Benzylic C–H oxidation to form carbonyl compounds, such as ketones, is a fundamental transformation in organic synthesis as it allows for the preparation of versatile intermediates.
Nonhlelo Majola, Vineet Jeena
doaj   +2 more sources

An Efficient and Recyclable Nanoparticle-Supported Cobalt Catalyst for Quinoxaline Synthesis [PDF]

open access: yesMolecules, 2015
The syntheses of quinoxalines derived from 1,2-diamine and 1,2-dicarbonyl compounds under mild reaction conditions was carried out using a nanoparticle-supported cobalt catalyst.
Fatemeh Rajabi   +2 more
doaj   +4 more sources

A Direct Method for Synthesis of Quinoxalines and Quinazolinones Using Epoxides as Alkyl Precursor [PDF]

open access: yesMolecules, 2023
An iodine-mediated one-pot synthesis of pyrrolo/indolo [1,2-a]quinoxalines and quinazolin-4-one via utilizing epoxides as alkyl precursors under metal-free conditions has been described.
Xueyan Lv   +5 more
doaj   +2 more sources

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