A simple and efficientsynthesis of 4-aryl-4,5-dihydro-1H-indeno[1,2-b]pyridine derivatives has been achieved via a four-component cyclocondensation of 1,3-indanedione, aromatic aldehydes, β-ketoesters and ammonium acetate in one-pot in the absence of catalyst and solvent at room temperature on grinding. The present approach offers several advantages such as shorter reaction times, higher yields, low
通过1,3-茚满二酮,芳族醛,β-的四组分环缩合反应,可以实现4-芳基-4,5-二氢-1 H-茚并[1,2- b ]吡啶衍生物的简单有效合成在室温下,在不存在催化剂和溶剂的情况下,一锅法制得酮酯和乙酸铵。本方法具有几个优点,例如较短的反应时间,较高的产率,低成本,简单的后处理和容易的纯化。
Rapid and Efficient Synthesis of 1,4-Dihydropyridines using a Sulfonic Acid-functionalized Ionic Liquid
classical Hantzsch synthesis, involve a threecomponent condensation of an aldehyde with ethylacetoacetate, and ammonia in acetic acid or in refluxing ethanol.13–18 These methods suffer from drawbacks such as long reaction times, lower yields, use of large volumes of organic solvents and harsh refluxing conditions. Several more efficient methods have recently been developed for the synthesis of fused derivatives
An eco-benign and highly efficient access to dihydro-1H-indeno[1,2-b]pyridines in 2,2,2-trifluoroethanol
作者:Samad Khaksar、Milad Gholami
DOI:10.1016/j.molliq.2014.03.030
日期:2014.8
4-Aryl-4,5-dihydro-1H-indeno[1,2-b]pyridine derivatives are synthesized from both electron-deficient and electron-rich substrates in a fast, high yielding, and operationally simple protocol in 2,2,2-trifluoroethanol (TFE). The solvent (TFE) can be readily separated from reaction products and recovered in excellent purity for direct reuse. (C) 2014 Elsevier B.V. All rights reserved.
Magnetic Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub> Core–Shell Nanoparticles Functionalized with Sulfamic Acid Polyamidoamine (PAMAM) Dendrimer for the Multicomponent Synthesis of Polyhydroquinolines and Dihydro-1H-Indeno[1,2-b] Pyridines
(2021). Magnetic Fe3O4@SiO2 Core–Shell Nanoparticles Functionalized with Sulfamic Acid Polyamidoamine (PAMAM) Dendrimer for the Multicomponent Synthesis of Polyhydroquinolines and Dihydro-1H-Indeno[1,2-b] Pyridines. Organic Preparations and Procedures International: Vol. 53, No. 5, pp. 498-508.