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
Cobalt ferrite encapsulated in a zwitterionic chitosan derived shell: An efficient nano-magnetic catalyst for three-component syntheses of pyrano[3,2-<i>c</i>
]quinolines and spiro-oxindoles
作者:Fatereh Asghari-Haji、Kurosh Rad-Moghadam、Nosrat O. Mahmoodi、Tayyebeh Tonekaboni、Najmeh Rahimi
DOI:10.1002/aoc.3891
日期:2017.12
nano‐magnetic core‐shell composite fabricated of a unique zwitterionicchitosan‐derived coating and cobaltferrite core was found to be a green and reusable heterogeneous catalyst for efficient synthesis of pyrano[3,2‐c]quinoline and spiro‐oxindole derivatives in high to excellent yields. Due to having negative charges at its outermost layer and a high magnetization, the catalyst is finely dispersed
由独特的两性离子壳聚糖衍生的涂层和钴铁氧体磁芯制成的纳米磁性核-壳复合物被发现是一种绿色且可重复使用的非均相催化剂,可高效合成吡喃并[3,2- c ]喹啉和螺-吲哚衍生物高到优异的产量。由于在其最外层具有负电荷并具有高磁化强度,因此该催化剂可以精细地分散在乙醇中,并且可以通过使用简单的外部磁体轻松地从反应混合物中分离出来。它相当稳定,可以重复使用多次,而催化活性没有明显损失。