Simple Three-Component Method for the Synthesis of Spiroindeno[1,2-<i>b</i>]pyrido[2,3-<i>d</i>]pyrimidine-5,3′-indolines
作者:Ghazaleh Imani Shakibaei、Afsaneh Feiz、Hamid Reza Khavasi、Ali Abolhasani Soorki、Ayoob Bazgir
DOI:10.1021/co1000053
日期:2011.1.10
An efficient, simple, and catalyst-free synthesis of spiroindeno[1,2-b]pyrido[2,3-d]pyrimidine-5,3′-indolines and spiroacenaphthylene-1,4′-indeno-1,5′-pyrido[2,3-d]pyrimidines by the three-component reaction of 1,3-indandione, amino uracils and isatins or acenaphthylene-1,2-dione in refluxing ethanol is reported.
螺啶[1,2- b ]吡啶基[2,3 - d ]嘧啶-5,3'-二氢吲哚和螺ac烯-1,4'-indeno-1,5'-的高效,简单且无催化剂的合成据报道,在回流的乙醇中,通过1,3-茚满二酮,氨基尿嘧啶和靛红或ena-1,2-二酮的三组分反应生成吡啶并[2,3- d ]嘧啶。
A Simple, Efficient and Environmentally Benign Synthetic Protocol for the Synthesis of Spirooxindoles Using Choline Chloride-Oxalic Acid Eutectic Mixture as Catalyst/Solvent System
efficient catalyst and environmentallybenign reaction medium. The present protocol offers several advantages such as operational simplicity with easy workup, shorter reaction times excellent yields with superior atom economy and environmentallybenign reaction conditions with the use of cost-effective, recyclable, non-toxic and bio-degradable DES as catalyst/solvent.