Synthesis of functionalized chromene and spirochromenes using l -proline-melamine as highly efficient and recyclable homogeneous catalyst at room temperature
commercially cheap l-proline and melamine for the synthesis of chromenes and spirochromenes (spirooxindoles) via multicomponent reactions at room temperature. Systematic studies were conducted in order to achieve desired reactivity and recyclability of the catalyst using various α-amino acids and aromatic amines as donor-acceptor pairs. Among the screened combinations, l-proline and melamine (3:1 ratio;
Preparation of GO/SiO<sub>2</sub>/PEA as a new solid base catalyst for the green synthesis of some spirooxindole derivatives
作者:Mahla Toorbaf、Leila Moradi
DOI:10.1039/d1ra02850b
日期:——
Efficient and green one pot multi component synthesis of some spirooxindole derivatives in the presence of grapheneoxide functionalized with 2-(1-piperazinyl) ethylamine (GO/SiO2/PEA) as a solid base catalyst was studied. GO/SiO2/PEA has been obtained through a two step reaction and characterized by Fourier transform infrared spectroscopy (FTIR), field emission scanning electron microscopy (FE-SEM)
研究了在以 2-(1-哌嗪基) 乙胺 (GO/SiO2/PEA) 为固体碱催化剂功能化的氧化石墨烯存在下,高效、绿色地一锅法合成一些螺吲哚衍生物。GO/SiO2/PEA通过两步反应得到,并通过傅里叶变换红外光谱(FTIR)、场发射扫描电子显微镜(FE-SEM)、能量色散X射线光谱(EDX)、热重分析( TGA)、拉曼光谱和 X 射线衍射 (XRD)。绿色反应条件、短反应时间、可重复使用的催化剂和高至优异的产品产率是该方法的一些优势。
A simple and clean method for multicomponent synthesis of spiro [indole-tetrahydropyrano(2,3-d)pyrimidine] derivatives using SBA-Pr-SO3H as catalyst under solvent-free conditions
functionalized SBA-15 (SBA-Pr-SO3H) as a new nanoporous solid acid catalyst was applied in the green one-pot synthesis of spiro[indole-tetrahydropyrano(2,3-d)pyrimidine] derivatives via three-component reaction of isatins, malononitrile or cyanoacetic esters and barbituric acids under solvent-freeconditions. SBA-Pr-SO3H was proved to be an efficient heterogeneous nanoporous solid acid catalyst with a pore
Oxalic acid dihydrate: proline as a new recyclable designer solvent: a sustainable, green avenue for the synthesis of spirooxindole
作者:Dattatray R. Chandam、Abhijeet G. Mulik、Dayanand R. Patil、Madhukar B. Deshmukh
DOI:10.1007/s11164-015-2093-3
日期:2016.2
encouraged to explore oxalic acid dihydrate: proline low transition temperature mixture as a new designer solvent for the said synthesis at room temperature. It has been successfully applied for the three componentreaction of isatin, malononitrile or ethyl cyanoacetate and 1,3–dicarbonyl compounds for the first time. Moderate to good yield of the products, shorter reaction time, energy efficiency, chromatography-free
An Efficient and Easy Method for the One‐pot Synthesis of Spirooxindoles in the Presence of Na
<sub>2</sub>
CO
<sub>3</sub>
作者:Khadhar Navaz Umar Basha、Shanthi Gnanamani
DOI:10.1002/jhet.3580
日期:2019.7
An efficient and easy procedure for the one‐potsynthesis of spirooxindoles in the presence of Na2CO3 in water : methanol (1:1) is described. The salient features of this method are simple methodology, shorter reaction time, easy product isolation, and no chromatographic purification.
描述了一种在Na 2 CO 3在水:甲醇(1:1)中单罐合成螺硫辛酯的有效简便的方法。该方法的主要特点是方法简单,反应时间短,产物易于分离且无需色谱纯化。