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.
Journal ArticleDOI
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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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Journal ArticleDOI
A Convenient and Chemoselective Acetylation and Formylation of Alcohols and Phenols Using Acetic Acid and Ethyl Formate in the Presence of Bi(III) Salts
TL;DR: A variety of alcohols are acetylated and formylated efficiently with acetic acid and ethyl formate in the presence of catalytic amounts of Bi(III) salts such as BiCl3, Bi(TFA)3 and Bi(OTf)3.
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Hafnium trifluoromethanesulfonate [Hf(OTf)4]-catalyzed conjugate addition of indoles to α,β-enones
TL;DR: Hafnium trifluoromethanesulfonate [Hf(OTf) 4 ]- and scandium tefluorsulfonates [Sc(OTF) 3 ]-catalyzed conjugated addition of 3position of indoles to several enones proceeded in acetonitrile as solvent as discussed by the authors.
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Zn/CeCl3.7H2O-TBPB: A new and 'green' promoter system for rapid and regioselective thiolyzation of 1,2-epoxides with aryl disulfides
TL;DR: In this article, a new, efficient, clean, and regioselective "one-pot" procedure for thiolyzation of epoxides with aryl disulfides catalyzed by cerium(III) chloride heptahydrate immobilized on tetrabutyl phosphonium bromide as an ionic liquid is reported.
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Chemoselective One-pot Conversion of Primary Alcohols to their Bis(indolyl)methanes Promoted by Bi(NO3)3·5H2O
TL;DR: In this article, a green and efficient one-pot protocol for the synthesis of bis(indoyl)methanes from primary alcohols using Bi(NO3)3 ·5H2O is described.
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Transformations of 3-formylindoles under the action of acids
TL;DR: In this paper, the influence of acids 3-formylindole forms urorosein (the salt of di(indol-3-yl)methylium) which is unstable in solution and decomposes to give a series of indole derivatives.