We describe a direct construction of all-carbon quaternary centers from secondary C(sp3)–H substrates through a dehydrogenativecross-couplingreaction. Using FeCl2·4H2O as the catalyst and employing air (molecular oxygen) as the terminal oxidant, the cross-coupling of indolin-2-ones with indoles proceeded smoothly under mild, ligand-free and base-free conditions, providing 3,3-disubstituted oxindoles
An Efficient and Green Method for the Synthesis of Oxindole Derivatives in Water
作者:G. Srihari、M. Marthanda Murthy
DOI:10.1246/cl.2008.268
日期:2008.3.5
An environmentally benign method for the synthesis of 3,3-di(3-indolyl)- and 3,3-di(2-pyrrolyl)oxindoles by using various isatins, indoles, and pyrrole in water in excellent yields and high regiose...
Someoxindolesderivatives are synthesized from the condensation of indoles with isatins in the presence of green and recycable catalyst [(CH2)4SO3HMIM][HSO4] in water at room temperature.
室温下,在绿色和可回收催化剂[(CH 2)4 SO 3 HMIM] [HSO 4 ]存在下,吲哚与靛红的缩合反应合成了一些羟吲哚衍生物。
Efficient synthesis of 3,3-di(indolyl)oxindoles catalyzed by sulfonic acid-functionalized mesoporous silica nanoparticles (SAMSNs) in aqueous media
An efficient protocol has been developed for the aqueous-mediated synthesis of 3,3-di(indolyl)oxindole derivatives via the electrophilic substitution reaction of indoles with various isatins using sulfonic acid-functionalized mesoporous silica nanoparticles (SAMSNs) as a recoverable heterogeneous acid catalyst. This catalyst can be reused several times without significant loss of activity.
A facile and efficient protocol for the synthesis of C3‐substituted indole derivatives has been developed under mild condition. The iron‐containing ionicliquid, 1‐(2‐hydroxyethyl)‐1,4‐diazabicyclo[2.2.2] octanylium tetrachloroferrate ([Dabco‐C2OH][FeCl4]) as a recyclable catalyst has been successfully used in the synthesis of trisindolines, bis(3‐indolyl) methanes and β‐indolyl alcohols for the first