Results 91 to 100 of about 7,031 (227)

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  

Foodborne Carcinogens: Formation Pathways, Health Risks, and Cutting‐Edge Physical and Chemical Prevention Strategies

eFood, Volume 7, Issue 3, June 2026.
This review highlights the formation of foodborne carcinogens during processing and evaluates different mitigation strategies, including natural antioxidants and modern cooking techniques, to reduce associated cancer risks and enhance food safety. ABSTRACT Food processing methods, though vital for improving food safety, taste, and shelf life, can ...
Naglaa S. Ashmawy, Ahmed A. Zaky, Noha H. Badr, Ali Korin, Mohamed A. Farag   +4 more
wiley   +1 more source

Studies in Benzimidazo Thiazolo Quinoxalines and Benzimidazo Thiazino Quinoxalines

, 1970
Benzimidazo (2', 1': 2, 3) thiazolo (4, 5-b) quinoxalines and 7H-benzimidazo (1', 2': 4, 5) (1 : 4) thiazino (2, 3-b) quinoxalines have been synthesised by the condensations of 2-mercapto benzimidazoles with 2 : 3-dichloro quinoxalines and 2-(mercaptomethyl) benzimidazole with 2 : 3-dichloro quinoxalines respectively.
Simran Singh, Singh, Chanan, K. S. Narang   +2 more
openaire   +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  

PFAS properties and destruction methods: A focus on enzymatic degradation

Journal of Chemical Technology &Biotechnology, Volume 101, Issue 6, Page 1126-1152, June 2026.
Abstract Per‐ and polyfluoroalkyl substances (PFAS) are known as ‘forever’ chemicals and have lasting detrimental impact on the environment and living organisms. To understand PFAS molecules better, this review begins with an overview of PFAS definition, classifications and applications, and then provides a comprehensive summary and critical analysis ...
Guobin Liang, Hua Zhao
wiley   +1 more source

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

Iron(III) promoted oxidative annulation of benzylic C-H bonds in (α-amino)arylacetic acids for synthesis of 4-aryl pyrrolo[1,2-a]quinoxalines

Vietnam Journal of Science, Technology and Engineering, 2023
Using amino acids for synthesis of heterocycles is a synthetically promising field. However, developing the practical methods for transformations of amino acids into heterocycles is still challenging.
Tuan Hoang Ho, Tung Thanh Nguyen, Tran Hoang Bao Ngo, Nam Thanh Son Phan   +3 more
doaj  

Mo‐Catalyzed Synthesis of N‐Polyheterocycles From Functionalized Nitroarenes and Aldehydes

Asian Journal of Organic Chemistry, Volume 15, Issue 5, May 2026.
Mo(VI)‐catalyzed one‐pot conversion of readily available functionalized nitroarenes and aldehydes yielded fused N‐polyheterocycles by sequential nitro reduction, imine formation, and cyclization. Using pinacol as a benign reductant, this sustainable tandem strategy suppresses side reactions and grants rapid access to diverse pharmacologically relevant ...
Raúl Martínez‐González, Rubén Rubio‐Presa, María R. Pedrosa, Samuel Suárez‐Pantiga, Roberto Sanz   +4 more
wiley   +1 more source

Improved catalytic activity of ruthenium–arene complexes in the reduction of NAD+ [PDF]

, 2012
A series of neutral Ru-II half-sandwich complexes of the type [(eta(6)-arene)Ru(N,N')Cl] where the arene is para-cymene (p-cym), hexamethylbenzene (hmb), biphenyl (bip), or benzene (bn) and N,N' is N-(2-aminoethyl) -4-(trifluoromethyl)benzenesulfonamide (
Abraha Habtemariam, Canivet J., Carrión M. C., Chen Q., Clayden J., Creutz C., Dibenedetto A., Fish R. H., Grau M. M., Grimme S., Guy J. Clarkson, Habtemariam A., Haquette P., Held M., Hileman E. O., Joan J. Soldevila-Barreda, Khan J. A., Kim Y. H., Leiva C., Li X., Lo H. C., Maenaka Y., Martins J. E. D., Matharu D. S., Matthew C. K., Morris R. E., Neese F., Noyori R., Peacock A. F. A., Peter J. Sadler, Pieter C. A. Bruijnincx, Robert J. Deeth, Robertson A., Romain C., Ruppert R., Sandoval C. A., Schäfer A., Sheldrick G. M., Sinnecker S., Tan J., Thai T., Wang C., Wang F., Watanabe M., Weckbecker A., Weigend F., Wolfson A., Wu J., Wu X., Yan Y. K., Ying W., Zhou Z., Zhou Z.   +52 more
core   +2 more sources

ChemBang: Expanding the Chemical Space Around Small Molecules

Molecular Informatics, Volume 45, Issue 5, May 2026.
Schematic diagram of the underlying concepts behind ChemBang and the molecular generation process from a seed molecular structure by applying the three main categories of chemical transformations, namely, interchange of small substituents, replacement of ring systems, and scaffold enlargement by additional ring systems.
Diana Montes‐Grajales, Luca Menestrina, Ricard Garcia‐Serna, Jordi Mestres   +3 more
wiley   +1 more source