One-pot pseudo three-component reaction of nitroketene-N,S-acetals and aldehydes for synthesis of highly functionalized hexa-substituted 1,4-dihydropyridines
作者:H. Surya Prakash Rao、A. Parthiban
DOI:10.1039/c4ob00628c
日期:——
We have described the simple, convenient and high yielding one-pot synthesis of a library of highly functionalized hexa-substituted 1,4-dihydropyridines (1,4-DHPs) by 2-aminopyridine catalysed pseudo three-component reaction of nitroketene-N,S-acetals and aldehydes. This domino transformation involves formation of dihydropyridine ring by creation of two C–C bonds and one C–N bond, all of them taking
我们已经描述了由2-氨基吡啶催化的硝基烯酮-N的拟三组分反应简单,便捷且高产率的一锅合成高功能化六取代的1,4-二氢吡啶(1,4-DHPs)库的方法,小号-缩醛和醛。这种多米诺骨牌转化涉及通过创建两个C–C键和一个C–N键形成二氢吡啶环,所有这些键均在一个合成操作中进行。由于产物从反应中沉淀出来,简单的过滤就足以收集产物,因此,不需要后处理或柱色谱法。用伯胺和仲胺取代产物1,4-DHP中的C6-甲基硫烷基,以提供1,4-DHP在结构多样性上进一步的可能性。为了证明该方法的应用,我们合成了新烟碱类杀虫剂乙炔吡喃的类似物。