Silica-bonded 1,4-diaza-bicyclo[2.2.2]octane-sulfonic acid chloride catalyzed synthesis of spiropyran derivatives
作者:Ahmad Reza Moosavi-Zare、Mohammad Ali Zolfigol、Ehsan Noroozizadeh、Rasoul Salehi-Moratab、Mahmoud Zarei
DOI:10.1016/j.molcata.2016.04.021
日期:2016.8
Abstract In this research, a novel nanostructured heterogeneous catalyst, namely silica-bonded 1,4-diaza-bicyclo[2.2.2]octane-sulfonic acid chloride (SBDBSAC), as an acidic ionic liquid based on 1,4-diaza-bicyclo[2.2.2]octane ring bonded to silica has been prepared and fully characterized by several techniques such as fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric
A general, efficient, and green method for one-potsynthesis of functionalized spirooxindoles through three-component condensation reaction of isatins, cyclohexane-1,3-diones, and barbituric acids is described employing gluconic acid aqueous solution (GAAS) as a novel reaction medium and catalyst. The reaction medium could be recycled and reused several times without significant loss of its efficiency
One‐pot three‐component synthesis of chromeno [2,3‐
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] pyrimidine derivatives: Novel, simple, and efficient electrochemical approach
作者:Jyoti Malviya、Rana Krishna Pal Singh
DOI:10.1002/jhet.3741
日期:2020.1
An atom economical, selective, and convenient one‐pot protocol for the synthesis of the medicinally privileged novel chromeno [2,3‐d] pyrimidine scaffold, viz, multicomponent reaction of barbituric acid derivatives, 1,3 cyclic diketone, and various aldehydes in the presence of tetra n‐butyl ammonium iodide (TBAI) as an electrolyte in water media under room temperature, is reported. This ecologically
一种原子经济,选择性和方便的单罐操作规程,可用于合成具有医学优势的新型chromeno [2,3- d ]嘧啶支架,即巴比妥酸衍生物,1,3环二酮和各种醛的多组分反应据报道,室温下水介质中存在四正丁基碘化铵(TBAI)作为电解质。这种具有生态学意义的新颖概念提供了对环境无害的合成路线,较短的反应时间和简便的后处理步骤,且收率极高(88%至90%),并且还有利于面向多样性的大规模流程。通过IR,MS,NMR和CHN分析对合成产物进行表征。
One-Pot, Three-Component Synthesis of a Library of Spirooxindole-Pyrimidines Catalyzed by Magnetic Nanoparticle Supported Dodecyl Benzenesulfonic Acid in Aqueous Media
作者:Jia Deng、Li-Ping Mo、Fei-Yang Zhao、Zhan-Hui Zhang、Shou-Xin Liu
DOI:10.1021/co3000264
日期:2012.5.14
Dodecyl benzenesulfonic acid functionalized silica-coated magnetic nanoparticles (gamma-Fe2O3@SiO2-DDBSA) were readily prepared and identified as an efficient catalyst for the synthesis of a library of spirooxindole-pyrimidine derivatives by three-component condensation reaction of barbituric acids, isatins and cyclohexane-1,3-diones. The aqueous reaction medium, easy recovery of the catalyst using an external magnet, and high yields make the protocol sustainable and economic.
Alum (KAl(SO4)2·12H2O) Catalyzed Multicomponent Transformation: Simple, Efficient, and Green Route to Synthesis of Functionalized Spiro[chromeno[2,3-d]pyrimidine-5,3′-indoline]-tetraones in Ionic Liquid Media
作者:Mojtaba Mirhosseini Moghaddam、Ayoob Bazgir、Akhondi Mohammad Mehdi、Ramin Ghahremanzadeh
DOI:10.1002/cjoc.201280014
日期:2012.3
The combination of isatin, barbituric acid, and cyclohexane‐1,3‐dione derivatives in the presence of alum (KAl(SO4)2·12H2O) as a catalyst for 15 min was found to be a suitable and efficient method for the synthesis of spiro[chromeno[2,3‐d]pyrimidine‐5,3′‐indoline]‐tetraones.
发现在明矾(KAl(SO 4)2 ·12H 2 O)作为催化剂存在下15分钟将Isatin,巴比妥酸和环己烷-1,3-二酮衍生物组合使用是一种合适且有效的方法螺[ chromeno [2,3 - d ]嘧啶-5,3'-二氢吲哚]-四酮的合成。