Iron mediated one pot three component synthesis of 3-substituted indoles via aerobic iminium ion formation
摘要:
An efficient and economical method was developed for the synthesis of 3 substituted indoles by a highly efficient one-pot three component coupling reaction of substituted or unsubstituted benzyl alcohol, N-methyl aniline or pyrrolidine, and indoles or substituted indoles. (C) 2015 Published by Elsevier Ltd.
An efficient micelle promoted one-pot synthesis of 3-amino alkylated indoles has been developed via a three-component Mannich-type reaction from secondary amines, aldehydes and indoles in water under mild reaction conditions. In this Mannich-type reaction, micelles stabilize iminium ions, which undergo a nucleophilic addition of the indole to give 3-amino alkylated indoles in very good yields.
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
One-Pot Synthesis of 3-[(<i>N</i>-Alkylanilino)(aryl)methyl]indoles via a Transition Metal Assisted Three-Component Condensation at Room Temperature
作者:Goutam Brahmachari、Suvankar Das
DOI:10.1002/jhet.1909
日期:2014.8
A simple and highly efficient protocol for the one-pot synthesis of a series of 3-[(N-alkylanilino)(aryl)methyl]indoles has been developed based on low-cost and environmentally benign zirconium oxychloride octahydrate and copper chloride dihydrate catalysts via three-component condensation between indoles, aromatic aldehydes, and N-alkylanilines at room temperature under neat condition. Mild reaction
Three component reaction of indoles, benzaldehydes, and N-alkylanilines in the presence of 2,4,6-trichloro-1,3,5-triazine (TCT) afforded the corresponding 3-[(N-alkylanilino)(aryl)methyl]indoles at room temperature in high yields (87-95%) within 1 to 2.5 hours.
Solvent‐freesynthesis of 3‐substituted indole derivatives by a one‐pot three‐component coupling reaction between aldehyde, N‐alkyl aniline and indole by Fe(HSO4)3 catalyzed is described. The noticeable features of this protocol are the simplicity of the procedure, easy synthesized, recyclable and inexpensive catalyst, no organic solvent and high yields in relatively short reaction times.