Studies on furan derivatives. X. Preparation of 2-substituted 3-(5-nitro-2-furyl)quinoxaline 1,4-dioxides and determination of their antibacterial activity.
作者:AKIRA TANAKA、TOSHINAO USUI
DOI:10.1248/cpb.29.110
日期:——
2-Substituted 3-(5-nitro-2-furyl) quinoxaline 1, 4-dioxides (Va-g) were prepared by the reaction of benzofurazan 1-oxide with α-aryl- or α-(2-furyl)-β-(5-nitro-2-furyl)-vinylamines and aryl or 2-furyl 5-nitro-2-furfuryl ketones. It was found that primary enamines, as well as tertiary enamines, are useful in this reaction. One-pot synthesis of 2-(2-furyl)-3-(5-nitro-2-furyl) quinoxaline 1, 4-dioxide (Va) from 2-[β-(5-nitro-2-furyl) ethynyl] furan was examined, and afforded Va in 11% yield. Compounds Va-g were subjected to antibacterial activity tests and some of them showed activity at 6.25-25μg/ml (minimal inhibitory concentration).
通过苯并呋咱 1-氧化物与 α-芳基-或 α-(2-呋喃基)-β-(5-硝基-2-呋喃基)-乙烯基胺和芳基或 2-呋喃基 5-硝基-2-糠基酮的反应,制备了 2-取代的 3-(5-硝基-2-呋喃基)喹喔啉 1,4-二氧化物(Va-g)。研究发现,伯胺和叔胺均可用于该反应。研究人员从 2-[β-(5-硝基-2-呋喃基)乙炔基]呋喃单锅合成 2-(2-呋喃基)-3-(5-硝基-2-呋喃基)喹喔啉 1,4-二氧化物(Va),得到 Va,收率为 11%。对 Va-g 化合物进行了抗菌活性测试,其中一些化合物在 6.25-25μg/ml (最小抑菌浓度)浓度下显示出活性。