Tris-hydroxymethylaminomethane (THAM): An efficient organocatalyst in diversity-oriented and environmentally benign synthesis of spirochromenes
作者:Supriya S. Khot、Prashant V. Anbhule、Uday V. Desai、Prakash P. Wadgaonkar
DOI:10.1016/j.crci.2018.05.005
日期:2018.9
Résumé Tris-hydroxymethylaminomethane has been demonstrated to be an efficient organocatalyst in diversity-oriented synthesis of medicinally prevalent spirochromenes by one-pot, three-component reactions between isatins, malononitrile, and enolizable CH acids like dimedone, 4-hydroxycoumarin, 4-hydroxy-N-methylquinolin-2-one, or in situ generated 2-methylpyrazolon-2-one. Biodegradability and extremely low cost of the catalyst are the noteworthy features of this chromatography-free protocol. Supplementary Materials: Supplementary material for this article is supplied as a separate file: mmc1.pdf
Ultrasound-assisted the three-component synthesis of spiro[4H-pyrano[3,2-c]quinolin-4,3′-indoline]-2′,5(6H)-diones in water
作者:Shaghyegh Gholizadeh、Koorosh Radmoghadam
DOI:10.13005/ojc/290450
日期:2013.12.30
A simple and efficient synthesis of the titled spirooxindoles was accomplished via the three-component reaction between isatins, 4-hydroxy-2H-quinolin-2-one, and malononitrile or ethylcyanoacetate in aqueous medium under ultrasound irradiation.
‘Solvent-free’ and ‘on-solvent’ multicomponent reaction of isatins, malononitrile, and bicyclic CH-acids: fast and efficient way to medicinal privileged spirooxindole scaffold
作者:Michail N. Elinson、Anatoly N. Vereshchagin、Fedor V. Ryzhkov、Yuliya E. Anisina
DOI:10.24820/ark.5550190.p010.640
日期:——
The fast (15 min) PASE-'solvent-free' and 'on-solvent' multicomponentreactions of isatins, malononitrile and bicyclicCH-acids catalyzed by sodium acetate result in efficient formation of substituted spiro-oxindoles in 90– 98% yields. These methods are fastmulticomponent approaches to the spiro-oxindoles, substances with promising anticancer activities. These new 'solvent-free' and 'on-solvent' techniques
A highly active FeNi3–SiO2 magnetic nanoparticles catalyst for the preparation of 4H-benzo[b]pyrans and Spirooxindoles under mild conditions
作者:Mohammad Ali Nasseri、Seyed Mohsen Sadeghzadeh
DOI:10.1007/s13738-013-0243-3
日期:2013.10
A green and efficient method for the synthesis of various 4H-benzo[b]pyrans and Spirooxindoles in the presence of FeNi3–SiO2 as the nanocatalyst at room temperature is reported. High catalytic activity and ease of recovery from the reaction mixture using an external magnet, and several reuse times without significant losses in performance are additional eco-friendly attributes of this catalytic system
Synthesis of spiro[indoline-3,4′-pyrano[3,2-c]quinolone]-3′-carbonitriles
作者:Ashraf A. Aly、Essmat M. El-Sheref、Aboul-Fetouh E. Mourad、Alan B. Brown、Stefan Bräse、Momtaz E. M. Bakheet、Martin Nieger
DOI:10.1007/s00706-017-2078-6
日期:2018.3
2′-amino-2,5′-dioxo-5′,6′-dihydrospiro(indoline-3,4′-pyrano[3,2-c]quinoline)-3′-carbonitriles in good to excellent yields. The structures of all new products were proven using one- and two-dimensional NMR, IR, and mass spectral data, and in five cases X-ray structural analyses. The possible mechanism for the reaction is also discussed. Graphical abstract
摘要喹啉-2,4-二酮与吡啶中的2-(2-氧代-1,2-二氢吲哚-3-亚烷基)丙二腈反应生成2'-氨基-2,5'-二氧代-5',6'-二氢螺基(二氢吲哚-3,4'-吡喃并[3,2- c ]喹啉)-3'-腈的收率良好。使用一维和二维NMR,IR和质谱数据以及五种情况下的X射线结构分析证明了所有新产品的结构。还讨论了反应的可能机理。 图形概要