Cooperative iridium complex-catalyzed synthesis of quinoxalines, benzimidazoles and quinazolines in water
作者:Kaushik Chakrabarti、Milan Maji、Sabuj Kundu
DOI:10.1039/c8gc03744b
日期:——
Herein, an efficient methodology for the synthesis of a diverse class of N-heterocyclic moieties, such as quinoxalines, benzimidazoles and quinazolines, was developed in water using bio-renewable alcohols. The quinoxalines were successfully synthesized from a wide range of diamines and nitroamines with diols in air. Interestingly, benzimidazoles and quinazolines were synthesized with excellent isolated
Iron-catalyzed one-pot synthesis of quinoxalines: transfer hydrogenative condensation of 2-nitroanilines with vicinal diols
作者:Ramachandra Reddy Putta、Simin Chun、Seok Beom Lee、Junhwa Hong、Dong-Chan Oh、Suckchang Hong
DOI:10.1039/d1ra02532e
日期:——
one-pot synthesis of quinoxalines via transfer hydrogenative condensation of 2-nitroanilines with vicinal diols. The tricarbonyl (η4-cyclopentadienone) iron complex, which is well known as the Knölker complex, catalyzed the oxidation of alcohols and the reduction of nitroarenes, and the corresponding carbonyl and 1,2-diaminobenzene intermediates were generated in situ. TrimethylamineN-oxide was used
Microwave-assisted Solvent-free Synthesis and in Vitro Antibacterial Screening of Quinoxalines and Pyrido[2, 3b]pyrazines
作者:J. Jesús Morales-Castellanos、Karina Ramírez-Hernández、Nancy S. Gómez-Flores、Oscar R. Rodas-Suárez、Javier Peralta-Cruz
DOI:10.3390/molecules17055164
日期:——
We report herein the microwaveassistedsynthesis, without solvents and catalysts, of 6-substituted quinoxalines and 7-substituted pyrido[2,3b]pyrazines. The compounds were obtained in good yields and short reaction times using the mentioned procedure and two new structures are reported. A complete 1H- and 13C-NMR assignment was performed using 1D and 2D-NMR. Additionally, an in vitro screening was