A one-pot, pseudo four-component synthesis of novel benzopyrano[2,3-b]pyridines under solvent-free conditions
作者:Abolfazl Olyaei、Mohsen Vaziri、Reza Razeghi
DOI:10.1016/j.tetlet.2013.01.124
日期:2013.4
facile, one-pot, pseudofour-component catalyst- and solvent-free synthesis of novel benzopyrano[2,3-b]pyridines is achieved by Michael addition of various naphthols to iminocoumarin derivatives obtained from Knoevenagel condensation of salicylaldehydes with malononitrile, which can be attacked by another molecule of malononitrile to afford the title products. The advantages of this procedure are mild
一种新型的苯并吡喃并[2,3- b ]吡啶的轻质,一锅,假四组分催化剂和无溶剂合成方法是通过将各种萘酚加成到水杨醛与丙二腈的Knoevenagel缩合得到的亚氨基香豆素衍生物中来实现的,可能会受到另一分子丙二腈的攻击而获得标题产物。该方法的优点是反应条件温和,产物收率高,通用性强,反应时间短和操作简便。
An Efficient One-Pot Three-Component Synthesis of Naphthyl-Substituted 5H-Chromeno[2,3-b]pyridine Derivatives under Solvent-Free Conditions
作者:K. Nissi Sharon、P. Padmaja、M. Tarun、E. Sumanth、P. Narayana Reddy
DOI:10.1134/s1070428023030156
日期:2023.3
Abstract An efficient one-pot three-component reaction for the synthesis of 5-[naphthalen-1(2)yl]-5H-chromeno[2,3-b]pyridine derivatives has been developed. The synthesis was achieved by reacting salicylaldehydes, 2-aminopropene-1,1,3-tricarbonitrile, and naphthols catalyzed by triethylamine undersolvent-freeconditions at 120°C. The reaction involves formation of two C–C bonds, one C–O bond, and
摘要 开发了一种用于合成 5-[naphthalen-1(2)yl]-5 H -chromeno[2,3- b ]pyridine 衍生物的高效一锅法三组分反应。该合成是通过水杨醛、2-氨基丙烯-1,1,3-三腈和萘酚在无溶剂条件下于 120°C 下由三乙胺催化反应实现的。该反应涉及在一次合成操作中形成两个 C-C 键、一个 C-O 键和一个 C-N 键。在用乙醇处理反应混合物后,可通过简单过滤分离最终产物。这种快速的一锅法反应不需要色谱纯化,并以良好的收率提供产品。