An efficient synthesis of multisubstituted 4-nitrobuta-1,3-dien-1-amines and application in cyclisation reactions
作者:Brigita Vigante、Aiva Plotniece、Martins Rucins、Marina Petrova、Ruslan Muhamadejev、Karlis Pajuste、Sergey Belyakov、Yuriy G. Shermolovich、Arkadij Sobolev
DOI:10.1016/j.tet.2018.03.075
日期:2018.5
synthetic usefulness of obtained 4-nitrobuta-1,3-dien-1-amines has also been demonstrated by achieving the synthesis of multisubstituted 5-nitro-1,6-dihydropyridines in two-component cyclocondensation reactions of 4-nitrobuta-1,3-dien-1-amines with aromatic or aliphatic aldehydes. Lastly, diverse N-H and N-substituted 5-nitro-1,6-dihydropyridines have been obtained in 35–87% yields.
由3-氨基巴豆酸酯和硝基乙醛钾盐合成多取代的4-nitrobuta-1,3-dien-1-amines(nitrodienamines)的产率为45-89%。这一一步方案可与各种NH和N-取代的3-氨基巴豆酸酯有效结合,并同时提供伯氮和仲氮二烯胺。另外,已经显示了4-硝基丁-1,3-二烯-1-胺的2和3位上的取代基的可能变化。通常,仲4-硝基丁-1,3-dien-1-胺的收率低于伯。通过在4-硝基丁-1的两组分环缩合反应中实现多取代的5-硝基-1,6-二氢吡啶的合成,也证明了所获得的4-硝基buta-1,3-dien-1-胺的合成有用性。 3-dien-1-胺与芳族或脂族醛。