develop an efficient and convenient procedure for the synthesis of 1,3- indandiones through three component synthesis of aldehydes, indole and 1,3-indandione catalyzed by [BDBDIm]Br as a reusable ionic liquid as catalyst. The remarkable advantages offered by this method are: catalyst is inexpensive, non-toxic, easy handling and reusable, simple work-up procedure, short reaction time, high yields of
背景:近年来,由于其具有显着的生物活性,人们越来越关注2-取代的1,3-茚满二酮化合物的合成。众所周知,茚满二酮和相关化合物具有广泛的生物学活性,例如抗肿瘤,抗癌,镇静,降压和神经肌肉阻滞活性。各种2-取代的1,3-茚满二酮的合成最初已被其已知的抗凝血和药理特性所刺激。作为一种非常强的电子受体,1,3-茚满二酮是新型双极分子的一部分,这些双极分子表现出令人感兴趣的光学特性,并在新型功能材料中用作掺杂剂。 方法:将含有醛,1,3-茚满二酮,吲哚和[BDBDIm] Br的混合物在80°C加热所需的反应时间。通过TLC(EtOAc∶石油醚1∶3)监测反应进程。反应完成后,产物用CHCl 3 / H 2 O萃取,优选有机相。蒸发和重结晶后,获得纯产物。还蒸发水相以产生再循环的双离子液体[BDBDIm] Br。通过IR,1 H NMR,13 C NMR和元素分析确认产物的身份和纯度。 结果:在继续进
“On-water” synthesis of 3-substituted indoles via Knoevenagel/Michael addition sequence catalyzed by Cu doped ZnS NPs
作者:Anshu Dandia、Shyam L. Gupta、Vijay Parewa、Amit Sharma、Kuldeep S. Rathore、Amit Sharma
DOI:10.1016/j.tetlet.2013.08.013
日期:2013.10
Cu doped ZnS NPs represent a green catalyst for an 'on-water' one-pot rapid synthesis of 3-substituted indole derivatives via Knoevenagel/Michael addition reaction of indane-1,3-dione, aromatic aldehydes, and indole. The catalytic activity of Cu doped ZnS NPs was about sevenfold higher as compared to the ZnS NPs. The Cu doped ZnS NPs catalyst could be recovered and reused for five reaction cycles, giving a total TOF = 201 h(-1). (C) 2013 Elsevier Ltd. All rights reserved.
Potassium 2-oxoimidazolidine-1,3-diide: An effective and new catalyst for the grinding synthesis of (1H-indol-3-yl)methyl-2H-indan-1,3-diones
作者:F. Bahrami、M. Nikpassand
DOI:10.4314/bcse.v32i2.18
日期:——
Potassium 2-oxoimidazolidine-1,3-diide (POImD) is easily used as an efficient and recyclable catalyst for the synthesis of 2H-indene-1,3-dione derivatives by a reaction between indoles, 2H-indene-1,3-dione and aldehydes at room temperature. All reactions are performed in humid POImD in high to excellent yield during short reaction time. Further, the catalyst can be reused and recovered for several times without loss of activity.