A Novel Method for the Synthesis of Spiro[indoline-Pyrazolo[4′,3′:5,6]pyrido[2,3-<i>d</i>]pyrimidine]triones by Alum as a Reusable Catalyst
作者:Sadif A. Shirvan、Ramin Ghahremanzadeh、Mojtaba Mirhosseini Moghaddam、Ayoob Bazgir、Amir Hassan Zarnani、Mohammad Mehdi Akhondi
DOI:10.1002/jhet.898
日期:2012.7
Synthesis of spiro[indoline‐pyrazolo[4′,3′:5,6]pyrido[2,3‐d]pyrimidine]trione derivatives by a cyclo‐condensation reaction of indolin‐2‐ones, barbituric acids, and 1,3‐diphenyl‐1H‐pyrazol‐5‐amines with the ionicliquid as an effective green reaction media and in the presence of Alum as a reusablecatalyst was reported. Excellent yields of products, green media, use of a reusablecatalyst, and short
吲哚啉-2-酮,巴比妥酸和1,3的环缩合反应合成螺[吲哚啉-吡唑并[4',3':5,6]吡啶[2,3- d ]嘧啶]三酮衍生物报道了以离子液体为有效绿色反应介质并以明矾为可重复使用催化剂的二苯基-1 H-吡唑-5-胺。这种新方法的主要优点是产品收率高,绿色介质,可重复使用的催化剂的使用以及较短的反应时间。
Choline chloride and lactic acid: A natural deep eutectic solvent for one-pot rapid construction of spiro[indoline-3,4′-pyrazolo[3,4-b]pyridines]
solvent (NDDES) in organic synthesis has received more and more attention. In this work, a green protocol for one-pot synthesis of spiro[indoline-3,4′-pyrazolo[3,4-b]pyridines] via three-componentreactions of 1H-pyrazol-5-amin, isatin and enolizable CH activated compound is achieved by the combination of microwave irradiation with choline chloride and lactic acidbased NDDES. This novel method is
天然共晶溶剂(NDDES)在有机合成中的应用受到越来越多的关注。在这项工作中,通过1 H-吡唑-5-氨基,靛红和烯醇化的三组分反应,一锅法合成螺[吲哚啉-3,4'-吡唑并[3,4- b ]吡啶]的绿色方案通过结合氯化胆碱和乳酸的NDDES进行微波辐射,可以实现C H活化的化合物。这种新颖的方法清洁,便宜,简单,产率高,无色谱且可扩展。氯化胆碱和乳酸作为可生物降解,可循环使用和可重复使用的介质的使用符合大多数被认为是可持续的和对环境有益的过程的标准。
An Efficient Four-component Synthesis of Spiro[indoline-pyrazolo[4′,3′:5,6]pyrido[2,3-d]pyrimidine]triones
A four‐component reaction in the presence of Alum [KAl(SO4)2·12H2O] as an inexpensive and reusable catalyst using the ionic liquid as an effective green reaction media is reported.