Journal ArticleDOI
Synthesis of 3-substituted indoles promoted by pulverization-activation method catalyzed by Bi(NO3)3·5H2O
Mohammad Mehdi Khodaei,Parvin Ghanbary,Iraj Mohammadpoor-Baltork,Hamid Reza Memarian,Ahmad Reza Khosropour,Kobra Nikoofar +5 more
TLDR
In this paper, 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(NO 3)3 ·5H 2O) through grinding of indoles with aldehydes or Michael acceptors.About:
This article is published in Journal of Heterocyclic Chemistry.The article was published on 2008-03-01. It has received 37 citations till now. The article focuses on the topics: Indole test & Catalysis.read more
Citations
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Journal ArticleDOI
Applications of bismuth(III) compounds in organic synthesis
TL;DR: This review article summarizes the applications of bismuth(III) compounds in organic synthesis since 2002 and is largely organized by the reaction type although some reactions can be placed in multiple sections.
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Glycerol as a promoting medium for electrophilic activation of aldehydes: catalyst-free synthesis of di(indolyl)methanes, xanthene-1,8(2H)-diones and 1-oxo-hexahydroxanthenes
TL;DR: Glycerol was used, for the first time, as a green and effective promoting medium for electrophilic activation of aldehydes, and with which, a catalyst-free system for some reactions that conventionally carried out using acid catalysts, such as synthesis of di(indolyl)methanes, 3,4,5,6,7,9-hexahydro-9-aryl-1H-xanthene-1,8(2H)-dione and 1-oxo-hexaphroxanthenes, was developed
Journal ArticleDOI
A practical and efficient synthesis of bis(indolyl)methanes in water, and synthesis of di-, tri-, and tetra(bis-indolyl)methanes under thermal conditions catalyzed by oxalic acid dihydrate
Ramin Ghorbani-Vaghei,Hojat Veisi,Hassan Keypour,Ahmad Ali Dehghani-Firouzabadi,Ahmad Ali Dehghani-Firouzabadi +4 more
TL;DR: A simple, clean, and highly efficient green protocol has been developed for synthesis of bis(indolyl), di(bis-indolyL), and tris-indolel methanes by the reaction of indole with aldehydes and ketones in the presence of oxalic acid dihydrate.
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A new approach for the synthesis of bisindoles through AgOTf as catalyst
TL;DR: The simplicity and easy operational methodology using a small amount of commercially available AgOTf, one of the lowest catalytic charge used in this process to date, makes this procedure an alternative approach for this interesting and appealing reaction.
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Nano TiO2/SiO2: An efficient and reusable catalyst for the synthesis of oxindole derivatives
Maryam Haghighi,Kobra Nikoofar +1 more
TL;DR: In this paper, a reusable nano-TiO2/SiO2 catalyst for the condensation reaction of indoles with isatins to afford the corresponding bis(indolyl)oxindoles at 50°C under solvent-free conditions was presented.
References
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Cyclizative Condensations. I. 2-Methylindole with Acetone and Methyl Ethyl Ketone1
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Catalytic enantioselective conjugate addition of indoles to simple α,β-unsaturated ketones
TL;DR: Chiral [Al(salen)Cl] complex in the presence of 2,6-lutidine was found to be effective in catalysing the enantioselective Friedel–Crafts-type conjugate addition of indoles to (E)-arylcrotyl ketones in excellent yield and high enantiOSElectivity.
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Bi(TFA)3–[nbp]FeCl4: a new, efficient and reusable promoter system for the synthesis of 4(3H)-quinazolinone derivatives
TL;DR: In this paper, a one-pot condensation of anthranilic acid, trimethyl orthoformate and primary amines in the presence of 5mmol% of Bi(TFA) 3 immobilized on [nbp]FeCl 4 as a room temperature ionic liquid is described.
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Reactions on solid supports part IV: Reactions of αβ-unsaturated carbonyl compounds with indoles using clay as catalyst
TL;DR: In this article, a 3-benzyl substituent already present migrated to the 2-position, being displaced by the incoming electrophile, thus confirming that electrophilic substitution in indole occurs primarily at the 3-position.
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Enamination of β-Dicarbonyl Compounds Catalyzed by CeCl3·7H2O at Ambient Conditions: Ionic Liquid and Solvent-Free Media
TL;DR: In this paper, a wide variety of primary amines were successfully examined in the presence of catalytic amounts of cerium chloride heptahydrate in ionic liquid and solvent-free conditions under mild reaction conditions.