A Novel and Efficient Synthesis of Pyrido[1,2-a]-Fused 1,3-Diazaheterocyclic Compounds via a One-Pot Three-Component Reaction
作者:Abdolali Alizadeh、Atieh Rezvanian
DOI:10.1002/hlca.201100274
日期:2012.1
An efficient one‐pot synthesis of pyrido[1,2‐a]‐fused 1,3‐diazaheterocyclic compounds by three‐component reaction of diamine, nitroketene dithioacetal (=1,1‐bis(methylsulfanyl)‐2‐nitroethene), and electron‐poor itaconic anhydride (=2‐methylidenesuccinic anhydride=2‐methylidenebutanedioic anhydride) in aqueous EtOH is reported. This protocol has the advantages of easiness, higher yields, and shorter
通过二胺,硝基烯酮二硫缩醛(= 1,1-双(甲基硫烷基)-2-硝基乙烯)和三胺的三组分反应有效地单锅合成吡啶并[1,2 - a ]-稠合的1,3-二氮杂杂环化合物据报道在EtOH水溶液中贫电子的衣康酸酐(= 2-甲基亚甲基琥珀酸酐= 2-甲基亚丁基丁二酸酐)。该方案具有容易,产率高和反应时间短的优点。该结构在光谱学上得到了证实(IR,1 H和13 C-NMR,以及EI-MS)并通过元素分析得到了证实。对于这种类型的环化,提出了一种合理的机制(方案2)。