One-Pot Synthesis of Biologically Important Spiro-2-amino-4<i>H</i>-pyrans, Spiroacenaphthylenes, and Spirooxindoles Using DBU as a Green and Recyclable Catalyst in Aqueous Medium
作者:Pooja Saluja、Komal Aggarwal、Jitender M. Khurana
DOI:10.1080/00397911.2012.760130
日期:2013.12.17
Abstract We have reported DBU-catalyzed one-potsynthesis of biologically and pharmacologically important spiropyrans from condensation of malononitrile/ethyl cyanoacetate, 1,3-dicarbonyl compounds, and ninhydrin/acenaphthequinone/istain in good yields. This new protocol employing DBU, which is a green, recyclable, and inexpensive catalyst, offers advantages such as mild reaction conditions, short
A bioglycerol derived carbon-sulfonic acid is found to catalyze efficiently the three-component one-pot condensation of isatin, malononitrile, and 1,3-dicarbonyls to afford a wide range of spiro[4H-pyran-3,3′-oxindole]derivatives in good yields and selectivity. The use of a recyclable solid acid catalyst makes this method simple, convenient, and cost-effective.
Ionic liquid catalyzed one-pot synthesis of spiropyran derivatives via three-component reaction in water
作者:Shuai-Shuai Jin、Mao-Hua Ding、Hong-Yun Guo
DOI:10.1515/hc-2012-0159
日期:2013.4.1
Abstract The ionic liquid [H3N+CH2CH2OH][CH3COO-] (HEAA) catalyzes a three-component, one-pot condensation of malononitrile/ethyl cyanoacetate, 1,3-dicarbonyl compound/enol, and quinone or ninhydrin in water to afford a spiropyran derivative. This method has advantages of mild reaction conditions, short reaction time, and environmental friendliness.
Durable magnetite-chitosan core–shell nanoparticles as reusable green nanocatalyst for the benign one-pot three-component synthesis of spirooxindoles and spirochromenes at ambient temperature under both solvent-free and ultrasonic conditions in aqueous ethanol solution
作者:Pegah Mardaneh、Ali Reza Sardarian
DOI:10.1007/s13738-023-02919-2
日期:2024.1
environmentally benign and efficacious fabrication of a variety of spirooxindole and spirochromene derivatives in high yields via employing three-component reactions of malononitrile, dimedone, and isatin in a solvent-free medium (Method A) and under ultrasonic conditions in EtOH/H2O (Method B) at ambient temperature. The achieved nanocatalyst could be easily removed from the mixture of the reaction and
在本研究中,通过简单易得的化学品将壳聚糖涂覆在 Fe 3 O 4纳米颗粒上,从而提供了一种新型、高效、绿色的纳米催化剂。使用傅里叶变换红外光谱、X射线衍射、扫描电子显微镜、动态光散射、振动样品磁力计和热重分析来描述这种纳米催化剂。Fe 3 O 4 @壳聚糖多相纳米催化剂的催化性能通过采用丙二腈、双甲酮和靛红的三组分反应在溶剂中进行,以环境友好且有效的方式高产率地制备各种螺吲哚和螺色烯衍生物,从而研究了Fe 3 O 4 @壳聚糖多相纳米催化剂的催化性能。自由介质(方法A)和在环境温度下在EtOH/H 2 O(方法B)中的超声波条件下。所获得的纳米催化剂可以很容易地从反应混合物中去除,并且可以通过简单的外部磁铁回收七次,而催化能力没有明显损失。该方法的其他几个优点是环境友好、操作简单、产率优异、处理经济且易于后处理。 图形概要
Ammonium salt catalyzed multicomponent transformation: simple route to functionalized spirochromenes and spiroacridines
The combination of isatin or acenaphthoquinone, an activated methylene reagent, and 1,3-dicarbonyl compounds in the presence of catalytic ammonium chloride was found to be a suitable and efficient method for the synthesis of the biologically important spirooxindoles. (c) 2009 Elsevier Ltd. All rights reserved.