Synthesis of novel 1,7-naphthyridines by Friedländer condensation of pyridine substrates
作者:Vegar Stockmann、Anne Fiksdahl
DOI:10.1002/jhet.657
日期:2011.11
The general ability of appropriate pyridyl compounds (aldehyde or ketone) to undergo Friedländer condensation to give different 1,7‐naphthyridines has been demonstrated. 2,4‐Disubstituted 1,7‐naphthyridine 8 was prepared from 3‐amino‐4‐acetylpyridine (6) and ketone 4 (82%). The Friedländer self‐condensation of pyridyl substrate 6 is reported, as well. The dimer product, 2‐(3‐aminopyridin‐4‐yl)‐4‐methyl‐1
适当的吡啶基化合物(醛或酮)经历弗里德兰德缩合反应生成不同的1,7-萘啶的一般能力已得到证明。由3-氨基-4-乙酰基吡啶(6)和酮4(82%)制备2,4-二取代的1,7-萘啶8。也报道了吡啶基底物6的Friedländer自缩合反应。获得二聚体产物2-(3-氨基吡啶-4-基)-4-甲基-1,7-萘啶(7),收率为97%。2-芳基-和2,3-二芳基-1,7-萘啶(16,17,18)从3- aminoisonicotinaldehyde(制备13)和arylketones 4,14和15(28-71%)。通过改进的吡啶硝化方法可以容易地获得关键衬底6和13。J.杂环化学。(2011)。