TEMPO/CuI synergetic catalyzed oxidative cross-coupling of indoles with benzylamines: Synthesis of bis(indolyl)phenylmethanes
摘要:
TEMPO/CuI was found to be an effective catalyst for the cross-coupling of indoles with benzylic amines affording the corresponding bis(indolyl)phenylmethanes under air atmosphere at room temperature in good to excellent yields. The efficiency, easy workup, simplicity, and chemoselectivity of this protocol provide a green and low-cost procedure for the synthesis of these compounds.[GRAPHICS].
Synthesis of 3‐substituted indoles promoted by pulverization‐activation method catalyzed by Bi(NO
<sub>3</sub>
)
<sub>3</sub>
·5H
<sub>2</sub>
O
作者:Mohammad M. Khodaei、Parvin Ghanbary、Iraj Mohammadpoor‐Baltork、Hamid R. Memarian、Ahmad R. Khosropour、Kobra Nikoofar
DOI:10.1002/jhet.5570450213
日期:2008.3
A new, facile, efficient, “green” and chemoselective procedure for the synthesis of indole derivatives has been developed with pulverization-activation method catalyzed by Bi(NO3)3·5H2O (PAMC- Bi(NO3)3·5H2O) through grinding of indoles with aldehydes or Michael acceptors in the presence of catalytic amounts of Bi(NO3)3·5H2O undersolvent-freeconditions.
Development of an imidazole salt catalytic system for the preparation of bis(indolyl)methanes and bis(naphthyl)methane
作者:Xu Wang、Courtney C. Aldrich
DOI:10.1371/journal.pone.0216008
日期:——
Imidazolium salts are shown to catalyze the rapid room temperature reaction of indoles or naphthol with aldehydes to provide bis(indolyl)methanes or bis(naphthol)methane in excellent yields and the reaction proceeds optimally in dichloromethane with no base additives. The reaction exhibits a broad substrate tolerance and occurs through nucleophilic activation of the indoles and naphthols through a
Herein, we demonstrated Mn-catalyzed selective C-3 functionalization of indoles with alcohols. The developed catalyst can also furnish bis(indolyl)methanes from the same set of substrates under slightly modified reaction conditions. Mechanistic studies reveal that the C-3 functionalization of indoles is going via a borrowing hydrogen pathway. To highlight the practical utility, a diverse range of substrates
Sulfonated Organic Heteropolyacid Salts: Recyclable Green Solid Catalysts for the Highly Efficient and Green Synthesis of Bis(indolyl)methanes in Water
作者:Seyed M. Vahdat、Samad Khaksar、Saeed Baghery
DOI:10.2174/157017812800221690
日期:2012.2.1
In the present study, we introduce two nonconventional ionic liquids [MIMPS]3PW12O40 (a) and [TEAPS]3PW12O40 (b) as green solid acid catalysts for the efficient synthesis of bis(indolyl)methanes. The reaction of indole with aldehydes or ketones in water afforded the corresponding bis(indolyl)methanes in excellent yields. This reaction has been carried out in the presence of 1 mol% of catalysts at room temperature. The reusability of the catalysts was demonstrated by a six-run test. Additionally, the catalysts pose several advantages including mild reaction conditions, cleaner reactions and shorter reaction times.
Ionic Liquid Tributyl (Carboxymethyl) Phosphonium Bromide as an efficient Catalyst for the Synthesis of bis(indolyl)Methanes under Solvent-Free Conditions
作者:Ardeshir Khazaei、Mohammad Ali Zolfigol、Toktam Faal-Rastegar
DOI:10.3184/174751913x13787959859380
日期:2013.10
A simple green synthesis of bis (indolyl)methanes involved the reaction of indole with aldehydes in the presence of a phosphonium salt ionicliquid as the catalyst. The simple experimental procedures, short reaction times, high yields of product, non-toxic catalyst and the absence of solvent are the advantages of this method.