A general and efficient method has been developed for the synthesis of 3-aminoalkylated indoles by a three-componentcoupling of indoles, aldehydes, and amines in the presence of a catalytic amount of zwitterionic-type molten salt under solvent-free conditions. The non-hazardous experimental procedure, mild reaction conditions, and the reusability of the catalyst are the notable advantages of the present
PANI-HBF<sub>4</sub>: A Reusable Polymer-Based Solid Acid Catalyst for Three-Component, One-Pot Synthesis of 3-Substituted Amino Methyl Indoles Under Solvent-Free Conditions
Abstract A simple, fast, efficient, high-yielding, and green process is developed for one-pot, three-componentsynthesis of 3-substituted amino methyl indolesundersolvent-freeconditions using polyaniline salt as polymer-based reusable solid acid catalyst at room temperature. The advantages of polyaniline salt catalyst are ease of synthesis and handling, low cost, versatality, and recyclability.
Catalyst-free, ethylene glycol promoted one-pot three component synthesis of 3-amino alkylated indoles via Mannich-type reaction
作者:U. Chinna Rajesh、Rohit Kholiya、V. Satya Pavan、Diwan S. Rawat
DOI:10.1016/j.tetlet.2014.03.112
日期:2014.4
A highly efficient and sustainable approach for the multi-component synthesis of biologically important 3-amino alkylated indoles has been investigated via Mannich-type reaction under catalyst-free, ethylene glycol as a recyclable promoting medium. The wide applicability of the present method was examined with various substrates viz substituted aldehydes, indoles and secondary amines. This method will be useful for a large scale synthesis of 3-amino alkylated indoles without the use of column chromatography. The present method provides higher environmental compatibility and sustainability factors such as smaller E-factor (0.433) and higher atom-economy (AE = 93.3%). (C) 2014 Elsevier Ltd. All rights reserved.
Bromodimethylsulfonium bromide (BDMS)-catalyzed multicomponent synthesis of 3-aminoalkylated indoles
作者:Deepak K. Yadav、Rajesh Patel、Vishnu P. Srivastava、Geeta Watal、Lal Dhar S. Yadav
DOI:10.1016/j.tetlet.2010.08.065
日期:2010.10
Bromodimethylsulfonium bromide (BDMS)-catalyzed three-component coupling reaction between indoles, aldehydes, and N-alkylanilines is reported to access substituted 3-aminoalkylated indoles at room temperature in high yields (82-96%) within 1.5-3.5 h. The salient features of this protocol are the simplicity of the procedure, the ready accessibility of the catalyst, its cost effectiveness, and higher yields in relatively short reaction times. (C) 2010 Elsevier Ltd. All rights reserved.
3-Substitued indoles: One-pot synthesis and evaluation of anticancer and Src kinase inhibitory activities
作者:V. Kameshwara Rao、Bhupender S. Chhikara、Amir Nasrolahi Shirazi、Rakesh Tiwari、Keykavous Parang、Anil Kumar
DOI:10.1016/j.bmcl.2011.05.010
日期:2011.6
An efficient and economical method was developed for the synthesis of 3-substituted indoles by one-pot three-component coupling reaction of a substituted or unsubstituted benzaldehyde, N-methylaniline, and indole or N-methylindole using Yb(OTf)(3)-SiO2 as a catalyst. All the synthesized compounds were evaluated for inhibition of cell proliferation of human colon carcinoma (HT-29), human ovarian adenocarcinoma (SK-OV-3), and c-Src kinase activity. The 4-methylphenyl (4o and 4p) and 4-methoxyphenyl (4q) indole derivatives inhibited the cell proliferation of SK-OV-3 and HT-29 cells by 70-77% at a concentration of 50 mu M. The unsubstituted phenyl (4d) and 3-nitrophenyl (4l) derivatives showed the inhibition of c-Src kinase with IC50 values of 50.6 and 58.3 mu M, respectively. (C) 2011 Elsevier Ltd. All rights reserved.